Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 1342 deletions

diff --git a/collectors/perf.plugin/perf_plugin.c b/collectors/perf.plugin/perf_plugin.c
deleted file mode 100644
index fe3b04daa..000000000
--- a/collectors/perf.plugin/perf_plugin.c
+++ /dev/null
@@ -1,1342 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include "libnetdata/libnetdata.h"
-#include "libnetdata/required_dummies.h"
-
-#include <linux/perf_event.h>
-
-#define PLUGIN_PERF_NAME "perf.plugin"
-
-// Hardware counters
-#define NETDATA_CHART_PRIO_PERF_CPU_CYCLES            8800
-#define NETDATA_CHART_PRIO_PERF_INSTRUCTIONS          8801
-#define NETDATA_CHART_PRIO_PERF_IPC                   8802
-#define NETDATA_CHART_PRIO_PERF_BRANCH_INSTRUCTIONS   8803
-#define NETDATA_CHART_PRIO_PERF_CACHE                 8804
-#define NETDATA_CHART_PRIO_PERF_BUS_CYCLES            8805
-#define NETDATA_CHART_PRIO_PERF_FRONT_BACK_CYCLES     8806
-
-// Software counters
-#define NETDATA_CHART_PRIO_PERF_MIGRATIONS            8810
-#define NETDATA_CHART_PRIO_PERF_ALIGNMENT             8811
-#define NETDATA_CHART_PRIO_PERF_EMULATION             8812
-
-// Hardware cache counters
-#define NETDATA_CHART_PRIO_PERF_L1D                   8820
-#define NETDATA_CHART_PRIO_PERF_L1D_PREFETCH          8821
-#define NETDATA_CHART_PRIO_PERF_L1I                   8822
-#define NETDATA_CHART_PRIO_PERF_LL                    8823
-#define NETDATA_CHART_PRIO_PERF_DTLB                  8824
-#define NETDATA_CHART_PRIO_PERF_ITLB                  8825
-#define NETDATA_CHART_PRIO_PERF_PBU                   8826
-
-#define RRD_TYPE_PERF "perf"
-#define RRD_FAMILY_HW "hardware"
-#define RRD_FAMILY_SW "software"
-#define RRD_FAMILY_CACHE "cache"
-
-#define NO_FD -1
-#define ALL_PIDS -1
-#define RUNNING_THRESHOLD 100
-
-static int debug = 0;
-
-static int update_every = 1;
-static int freq = 0;
-
-typedef enum perf_event_id {
-    // Hardware counters
-    EV_ID_CPU_CYCLES,
-    EV_ID_INSTRUCTIONS,
-    EV_ID_CACHE_REFERENCES,
-    EV_ID_CACHE_MISSES,
-    EV_ID_BRANCH_INSTRUCTIONS,
-    EV_ID_BRANCH_MISSES,
-    EV_ID_BUS_CYCLES,
-    EV_ID_STALLED_CYCLES_FRONTEND,
-    EV_ID_STALLED_CYCLES_BACKEND,
-    EV_ID_REF_CPU_CYCLES,
-
-    // Software counters
-    // EV_ID_CPU_CLOCK,
-    // EV_ID_TASK_CLOCK,
-    // EV_ID_PAGE_FAULTS,
-    // EV_ID_CONTEXT_SWITCHES,
-    EV_ID_CPU_MIGRATIONS,
-    // EV_ID_PAGE_FAULTS_MIN,
-    // EV_ID_PAGE_FAULTS_MAJ,
-    EV_ID_ALIGNMENT_FAULTS,
-    EV_ID_EMULATION_FAULTS,
-
-    // Hardware cache counters
-    EV_ID_L1D_READ_ACCESS,
-    EV_ID_L1D_READ_MISS,
-    EV_ID_L1D_WRITE_ACCESS,
-    EV_ID_L1D_WRITE_MISS,
-    EV_ID_L1D_PREFETCH_ACCESS,
-
-    EV_ID_L1I_READ_ACCESS,
-    EV_ID_L1I_READ_MISS,
-
-    EV_ID_LL_READ_ACCESS,
-    EV_ID_LL_READ_MISS,
-    EV_ID_LL_WRITE_ACCESS,
-    EV_ID_LL_WRITE_MISS,
-
-    EV_ID_DTLB_READ_ACCESS,
-    EV_ID_DTLB_READ_MISS,
-    EV_ID_DTLB_WRITE_ACCESS,
-    EV_ID_DTLB_WRITE_MISS,
-
-    EV_ID_ITLB_READ_ACCESS,
-    EV_ID_ITLB_READ_MISS,
-
-    EV_ID_PBU_READ_ACCESS,
-
-    EV_ID_END
-} perf_event_id_t;
-
-enum perf_event_group {
-    EV_GROUP_CYCLES,
-    EV_GROUP_INSTRUCTIONS_AND_CACHE,
-    EV_GROUP_SOFTWARE,
-    EV_GROUP_CACHE_L1D,
-    EV_GROUP_CACHE_L1I_LL_DTLB,
-    EV_GROUP_CACHE_ITLB_BPU,
-
-    EV_GROUP_NUM
-};
-
-static int number_of_cpus;
-
-static int *group_leader_fds[EV_GROUP_NUM];
-
-static struct perf_event {
-    perf_event_id_t id;
-
-    int type;
-    int config;
-
-    int **group_leader_fd;
-    int *fd;
-
-    int disabled;
-    int updated;
-
-    uint64_t value;
-
-    uint64_t *prev_value;
-    uint64_t *prev_time_enabled;
-    uint64_t *prev_time_running;
-} perf_events[] = {
-    // Hardware counters
-    {EV_ID_CPU_CYCLES,              PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES,              &group_leader_fds[EV_GROUP_CYCLES], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_INSTRUCTIONS,            PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS,            &group_leader_fds[EV_GROUP_INSTRUCTIONS_AND_CACHE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_CACHE_REFERENCES,        PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES,        &group_leader_fds[EV_GROUP_INSTRUCTIONS_AND_CACHE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_CACHE_MISSES,            PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES,            &group_leader_fds[EV_GROUP_INSTRUCTIONS_AND_CACHE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_BRANCH_INSTRUCTIONS,     PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS,     &group_leader_fds[EV_GROUP_INSTRUCTIONS_AND_CACHE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_BRANCH_MISSES,           PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES,           &group_leader_fds[EV_GROUP_INSTRUCTIONS_AND_CACHE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_BUS_CYCLES,              PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES,              &group_leader_fds[EV_GROUP_CYCLES], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_STALLED_CYCLES_FRONTEND, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND, &group_leader_fds[EV_GROUP_CYCLES], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_STALLED_CYCLES_BACKEND,  PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND,  &group_leader_fds[EV_GROUP_CYCLES], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_REF_CPU_CYCLES,          PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES,          &group_leader_fds[EV_GROUP_CYCLES], NULL, 1, 0, 0, NULL, NULL, NULL},
-
-    // Software counters
-    // {EV_ID_CPU_CLOCK,        PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK,        &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    // {EV_ID_TASK_CLOCK,       PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK,       &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    // {EV_ID_PAGE_FAULTS,      PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS,      &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    // {EV_ID_CONTEXT_SWITCHES, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES, &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_CPU_MIGRATIONS,   PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS,   &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    // {EV_ID_PAGE_FAULTS_MIN,  PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN,  &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    // {EV_ID_PAGE_FAULTS_MAJ,  PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ,  &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_ALIGNMENT_FAULTS, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS, &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-    {EV_ID_EMULATION_FAULTS, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS, &group_leader_fds[EV_GROUP_SOFTWARE], NULL, 1, 0, 0, NULL, NULL, NULL},
-
-    // Hardware cache counters
-    {
-        EV_ID_L1D_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1D) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1D], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_L1D_READ_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1D) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1D], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_L1D_WRITE_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1D) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1D], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_L1D_WRITE_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1D) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1D], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_L1D_PREFETCH_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1D) | (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1D], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {
-        EV_ID_L1I_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1I) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_L1I_READ_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_L1I) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {
-        EV_ID_LL_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_LL) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_LL_READ_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_LL) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_LL_WRITE_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_LL) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_LL_WRITE_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_LL) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {
-        EV_ID_DTLB_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_DTLB) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_DTLB_READ_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_DTLB) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_DTLB_WRITE_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_DTLB) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_L1I_LL_DTLB], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_DTLB_WRITE_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_DTLB) | (PERF_COUNT_HW_CACHE_OP_WRITE << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_ITLB_BPU], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {
-        EV_ID_ITLB_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_ITLB) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_ITLB_BPU], NULL, 1, 0, 0, NULL, NULL, NULL
-    }, {
-        EV_ID_ITLB_READ_MISS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_ITLB) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_ITLB_BPU], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {
-        EV_ID_PBU_READ_ACCESS, PERF_TYPE_HW_CACHE,
-        (PERF_COUNT_HW_CACHE_BPU) | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
-        &group_leader_fds[EV_GROUP_CACHE_ITLB_BPU], NULL, 1, 0, 0, NULL, NULL, NULL
-    },
-
-    {EV_ID_END, 0, 0, NULL, NULL, 0, 0, 0, NULL, NULL, NULL}
-};
-
-static int perf_init() {
-    int cpu, group;
-    struct perf_event_attr perf_event_attr;
-    struct perf_event *current_event = NULL;
-    unsigned long flags = 0;
-
-    number_of_cpus = (int)get_system_cpus();
-
-    // initialize all perf event file descriptors
-    for(current_event = &perf_events[0]; current_event->id != EV_ID_END; current_event++) {
-        current_event->fd = mallocz(number_of_cpus * sizeof(int));
-        memset(current_event->fd, NO_FD, number_of_cpus * sizeof(int));
-
-        current_event->prev_value = mallocz(number_of_cpus * sizeof(uint64_t));
-        memset(current_event->prev_value, 0, number_of_cpus * sizeof(uint64_t));
-
-        current_event->prev_time_enabled = mallocz(number_of_cpus * sizeof(uint64_t));
-        memset(current_event->prev_time_enabled, 0, number_of_cpus * sizeof(uint64_t));
-
-        current_event->prev_time_running = mallocz(number_of_cpus * sizeof(uint64_t));
-        memset(current_event->prev_time_running, 0, number_of_cpus * sizeof(uint64_t));
-    }
-
-    for(group = 0; group < EV_GROUP_NUM; group++) {
-        group_leader_fds[group] = mallocz(number_of_cpus * sizeof(int));
-        memset(group_leader_fds[group], NO_FD, number_of_cpus * sizeof(int));
-    }
-
-    memset(&perf_event_attr, 0, sizeof(perf_event_attr));
-
-    for(cpu = 0; cpu < number_of_cpus; cpu++) {
-        for(current_event = &perf_events[0]; current_event->id != EV_ID_END; current_event++) {
-            if(unlikely(current_event->disabled)) continue;
-
-            perf_event_attr.type = current_event->type;
-            perf_event_attr.config = current_event->config;
-            perf_event_attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | PERF_FORMAT_TOTAL_TIME_RUNNING;
-
-            int fd, group_leader_fd = *(*current_event->group_leader_fd + cpu);
-
-            fd = syscall(
-                __NR_perf_event_open,
-                &perf_event_attr,
-                ALL_PIDS,
-                cpu,
-                group_leader_fd,
-                flags
-            );
-
-            if(unlikely(group_leader_fd == NO_FD)) group_leader_fd = fd;
-
-            if(unlikely(fd < 0)) {
-                switch errno {
-                    case EACCES:
-                        collector_error("Cannot access to the PMU: Permission denied");
-                        break;
-                    case EBUSY:
-                        collector_error("Another event already has exclusive access to the PMU");
-                        break;
-                    default:
-                        collector_error("Cannot open perf event");
-                }
-                collector_error("Disabling event %u", current_event->id);
-                current_event->disabled = 1;
-            }
-
-            *(current_event->fd + cpu) = fd;
-            *(*current_event->group_leader_fd + cpu) = group_leader_fd;
-
-            if(unlikely(debug)) fprintf(stderr, "perf.plugin: event id = %u, cpu = %d, fd = %d, leader_fd = %d\n", current_event->id, cpu, fd, group_leader_fd);
-        }
-    }
-
-    return 0;
-}
-
-static void perf_free(void) {
-    int cpu, group;
-    struct perf_event *current_event = NULL;
-
-    for(current_event = &perf_events[0]; current_event->id != EV_ID_END; current_event++) {
-        for(cpu = 0; cpu < number_of_cpus; cpu++)
-            if(*(current_event->fd + cpu) != NO_FD) close(*(current_event->fd + cpu));
-
-        free(current_event->fd);
-        free(current_event->prev_value);
-        free(current_event->prev_time_enabled);
-        free(current_event->prev_time_running);
-    }
-
-    for(group = 0; group < EV_GROUP_NUM; group++)
-        free(group_leader_fds[group]);
-}
-
-static void reenable_events() {
-    int group, cpu;
-
-    for(group = 0; group < EV_GROUP_NUM; group++) {
-        for(cpu = 0; cpu < number_of_cpus; cpu++) {
-            int current_fd = *(group_leader_fds[group] + cpu);
-
-            if(unlikely(current_fd == NO_FD)) continue;
-
-            if(ioctl(current_fd, PERF_EVENT_IOC_DISABLE, PERF_IOC_FLAG_GROUP) == -1
-               || ioctl(current_fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP) == -1)
-            {
-                collector_error("Cannot reenable event group");
-            }
-        }
-    }
-}
-
-static int perf_collect() {
-    int cpu;
-    struct perf_event *current_event = NULL;
-    static uint64_t prev_cpu_cycles_value = 0;
-    struct {
-        uint64_t value;
-        uint64_t time_enabled;
-        uint64_t time_running;
-    } read_result;
-
-    for(current_event = &perf_events[0]; current_event->id != EV_ID_END; current_event++) {
-        current_event->updated = 0;
-        current_event->value = 0;
-
-        if(unlikely(current_event->disabled)) continue;
-
-        for(cpu = 0; cpu < number_of_cpus; cpu++) {
-
-            ssize_t read_size = read(current_event->fd[cpu], &read_result, sizeof(read_result));
-
-            if(likely(read_size == sizeof(read_result))) {
-                if (likely(read_result.time_running
-                           && read_result.time_running != *(current_event->prev_time_running + cpu)
-                           && (read_result.time_enabled / read_result.time_running < RUNNING_THRESHOLD))) {
-                    current_event->value += (read_result.value - *(current_event->prev_value + cpu)) \
-                                             * (read_result.time_enabled - *(current_event->prev_time_enabled + cpu)) \
-                                             / (read_result.time_running - *(current_event->prev_time_running + cpu));
-                }
-
-                *(current_event->prev_value + cpu) = read_result.value;
-                *(current_event->prev_time_enabled + cpu) = read_result.time_enabled;
-                *(current_event->prev_time_running + cpu) = read_result.time_running;
-
-                current_event->updated = 1;
-            }
-            else {
-                collector_error("Cannot update value for event %u", current_event->id);
-                return 1;
-            }
-        }
-
-        if(unlikely(debug)) fprintf(stderr, "perf.plugin: successfully read event id = %u, value = %"PRIu64"\n", current_event->id, current_event->value);
-    }
-
-    if(unlikely(perf_events[EV_ID_CPU_CYCLES].value == prev_cpu_cycles_value))
-        reenable_events();
-    prev_cpu_cycles_value = perf_events[EV_ID_CPU_CYCLES].value;
-
-    return 0;
-}
-
-static void perf_send_metrics() {
-    static int // Hardware counters
-               cpu_cycles_chart_generated = 0,
-               instructions_chart_generated = 0,
-               ipc_chart_generated = 0,
-               branch_chart_generated = 0,
-               cache_chart_generated = 0,
-               bus_cycles_chart_generated = 0,
-               stalled_cycles_chart_generated = 0,
-
-               // Software counters
-               migrations_chart_generated = 0,
-               alignment_chart_generated = 0,
-               emulation_chart_generated = 0,
-
-               // Hardware cache counters
-               L1D_chart_generated = 0,
-               L1D_prefetch_chart_generated = 0,
-               L1I_chart_generated = 0,
-               LL_chart_generated = 0,
-               DTLB_chart_generated = 0,
-               ITLB_chart_generated = 0,
-               PBU_chart_generated = 0;
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_CPU_CYCLES].updated || perf_events[EV_ID_REF_CPU_CYCLES].updated)) {
-        if(unlikely(!cpu_cycles_chart_generated)) {
-            cpu_cycles_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'CPU cycles' 'cycles/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "cpu_cycles"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_CPU_CYCLES
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "cpu");
-            printf("DIMENSION %s '' absolute 1 1\n", "ref_cpu");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "cpu_cycles"
-        );
-        if(likely(perf_events[EV_ID_CPU_CYCLES].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "cpu"
-                   , (collected_number) perf_events[EV_ID_CPU_CYCLES].value
-            );
-        }
-        if(likely(perf_events[EV_ID_REF_CPU_CYCLES].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "ref_cpu"
-                   , (collected_number) perf_events[EV_ID_REF_CPU_CYCLES].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_INSTRUCTIONS].updated)) {
-        if(unlikely(!instructions_chart_generated)) {
-            instructions_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Instructions' 'instructions/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "instructions"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_INSTRUCTIONS
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "instructions");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "instructions"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "instructions"
-               , (collected_number) perf_events[EV_ID_INSTRUCTIONS].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_INSTRUCTIONS].updated) && likely(perf_events[EV_ID_CPU_CYCLES].updated)) {
-        if(unlikely(!ipc_chart_generated)) {
-            ipc_chart_generated = 1;
-
-            printf("CHART %s.%s '' '%s' 'instructions/cycle' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "instructions_per_cycle"
-                   , "Instructions per Cycle(IPC)"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_IPC
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 100\n", "ipc");
-        }
-
-        printf("BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "instructions_per_cycle"
-               );
-
-        NETDATA_DOUBLE result = ((NETDATA_DOUBLE)perf_events[EV_ID_INSTRUCTIONS].value /
-                                    (NETDATA_DOUBLE)perf_events[EV_ID_CPU_CYCLES].value) * 100.0;
-        printf("SET %s = %lld\n"
-               , "ipc"
-               , (collected_number) result
-               );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_BRANCH_INSTRUCTIONS].updated || perf_events[EV_ID_BRANCH_MISSES].updated)) {
-        if(unlikely(!branch_chart_generated)) {
-            branch_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Branch instructions' 'instructions/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "branch_instructions"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_BRANCH_INSTRUCTIONS
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "instructions");
-            printf("DIMENSION %s '' absolute 1 1\n", "misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "branch_instructions"
-        );
-        if(likely(perf_events[EV_ID_BRANCH_INSTRUCTIONS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "instructions"
-                   , (collected_number) perf_events[EV_ID_BRANCH_INSTRUCTIONS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_BRANCH_MISSES].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "misses"
-                   , (collected_number) perf_events[EV_ID_BRANCH_MISSES].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_CACHE_REFERENCES].updated || perf_events[EV_ID_CACHE_MISSES].updated)) {
-        if(unlikely(!cache_chart_generated)) {
-            cache_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Cache operations' 'operations/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "cache"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_CACHE
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "references");
-            printf("DIMENSION %s '' absolute 1 1\n", "misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "cache"
-        );
-        if(likely(perf_events[EV_ID_CACHE_REFERENCES].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "references"
-                   , (collected_number) perf_events[EV_ID_CACHE_REFERENCES].value
-            );
-        }
-        if(likely(perf_events[EV_ID_CACHE_MISSES].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "misses"
-                   , (collected_number) perf_events[EV_ID_CACHE_MISSES].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_BUS_CYCLES].updated)) {
-        if(unlikely(!bus_cycles_chart_generated)) {
-            bus_cycles_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Bus cycles' 'cycles/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "bus_cycles"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_BUS_CYCLES
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "bus");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "bus_cycles"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "bus"
-               , (collected_number) perf_events[EV_ID_BUS_CYCLES].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_STALLED_CYCLES_FRONTEND].updated || perf_events[EV_ID_STALLED_CYCLES_BACKEND].updated)) {
-        if(unlikely(!stalled_cycles_chart_generated)) {
-            stalled_cycles_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Stalled frontend and backend cycles' 'cycles/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "stalled_cycles"
-                   , RRD_FAMILY_HW
-                   , NETDATA_CHART_PRIO_PERF_FRONT_BACK_CYCLES
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "frontend");
-            printf("DIMENSION %s '' absolute 1 1\n", "backend");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "stalled_cycles"
-        );
-        if(likely(perf_events[EV_ID_STALLED_CYCLES_FRONTEND].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "frontend"
-                   , (collected_number) perf_events[EV_ID_STALLED_CYCLES_FRONTEND].value
-            );
-        }
-        if(likely(perf_events[EV_ID_STALLED_CYCLES_BACKEND].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "backend"
-                   , (collected_number) perf_events[EV_ID_STALLED_CYCLES_BACKEND].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_CPU_MIGRATIONS].updated)) {
-        if(unlikely(!migrations_chart_generated)) {
-            migrations_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'CPU migrations' 'migrations' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "migrations"
-                   , RRD_FAMILY_SW
-                   , NETDATA_CHART_PRIO_PERF_MIGRATIONS
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "migrations");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "migrations"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "migrations"
-               , (collected_number) perf_events[EV_ID_CPU_MIGRATIONS].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_ALIGNMENT_FAULTS].updated)) {
-        if(unlikely(!alignment_chart_generated)) {
-            alignment_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Alignment faults' 'faults' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "alignment_faults"
-                   , RRD_FAMILY_SW
-                   , NETDATA_CHART_PRIO_PERF_ALIGNMENT
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "faults");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "alignment_faults"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "faults"
-               , (collected_number) perf_events[EV_ID_ALIGNMENT_FAULTS].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_EMULATION_FAULTS].updated)) {
-        if(unlikely(!emulation_chart_generated)) {
-            emulation_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'Emulation faults' 'faults' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "emulation_faults"
-                   , RRD_FAMILY_SW
-                   , NETDATA_CHART_PRIO_PERF_EMULATION
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "faults");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "emulation_faults"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "faults"
-               , (collected_number) perf_events[EV_ID_EMULATION_FAULTS].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_L1D_READ_ACCESS].updated || perf_events[EV_ID_L1D_READ_MISS].updated
-              || perf_events[EV_ID_L1D_WRITE_ACCESS].updated || perf_events[EV_ID_L1D_WRITE_MISS].updated)) {
-        if(unlikely(!L1D_chart_generated)) {
-            L1D_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'L1D cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "l1d_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_L1D
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-            printf("DIMENSION %s '' absolute 1 1\n", "read_misses");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_access");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "l1d_cache"
-        );
-        if(likely(perf_events[EV_ID_L1D_READ_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_access"
-                   , (collected_number) perf_events[EV_ID_L1D_READ_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_L1D_READ_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_misses"
-                   , (collected_number) perf_events[EV_ID_L1D_READ_MISS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_L1D_WRITE_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_access"
-                   , (collected_number) perf_events[EV_ID_L1D_WRITE_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_L1D_WRITE_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_misses"
-                   , (collected_number) perf_events[EV_ID_L1D_WRITE_MISS].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_L1D_PREFETCH_ACCESS].updated)) {
-        if(unlikely(!L1D_prefetch_chart_generated)) {
-            L1D_prefetch_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'L1D prefetch cache operations' 'prefetches/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "l1d_cache_prefetch"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_L1D_PREFETCH
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "prefetches");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "l1d_cache_prefetch"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "prefetches"
-               , (collected_number) perf_events[EV_ID_L1D_PREFETCH_ACCESS].value
-        );
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_L1I_READ_ACCESS].updated || perf_events[EV_ID_L1I_READ_MISS].updated)) {
-        if(unlikely(!L1I_chart_generated)) {
-            L1I_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'L1I cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "l1i_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_L1I
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-            printf("DIMENSION %s '' absolute 1 1\n", "read_misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "l1i_cache"
-        );
-        if(likely(perf_events[EV_ID_L1I_READ_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_access"
-                   , (collected_number) perf_events[EV_ID_L1I_READ_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_L1I_READ_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_misses"
-                   , (collected_number) perf_events[EV_ID_L1I_READ_MISS].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_LL_READ_ACCESS].updated || perf_events[EV_ID_LL_READ_MISS].updated
-              || perf_events[EV_ID_LL_WRITE_ACCESS].updated || perf_events[EV_ID_LL_WRITE_MISS].updated)) {
-        if(unlikely(!LL_chart_generated)) {
-            LL_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'LL cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "ll_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_LL
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-            printf("DIMENSION %s '' absolute 1 1\n", "read_misses");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_access");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "ll_cache"
-        );
-        if(likely(perf_events[EV_ID_LL_READ_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_access"
-                   , (collected_number) perf_events[EV_ID_LL_READ_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_LL_READ_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_misses"
-                   , (collected_number) perf_events[EV_ID_LL_READ_MISS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_LL_WRITE_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_access"
-                   , (collected_number) perf_events[EV_ID_LL_WRITE_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_LL_WRITE_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_misses"
-                   , (collected_number) perf_events[EV_ID_LL_WRITE_MISS].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_DTLB_READ_ACCESS].updated || perf_events[EV_ID_DTLB_READ_MISS].updated
-              || perf_events[EV_ID_DTLB_WRITE_ACCESS].updated || perf_events[EV_ID_DTLB_WRITE_MISS].updated)) {
-        if(unlikely(!DTLB_chart_generated)) {
-            DTLB_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'DTLB cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "dtlb_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_DTLB
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-            printf("DIMENSION %s '' absolute 1 1\n", "read_misses");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_access");
-            printf("DIMENSION %s '' absolute -1 1\n", "write_misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "dtlb_cache"
-        );
-        if(likely(perf_events[EV_ID_DTLB_READ_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_access"
-                   , (collected_number) perf_events[EV_ID_DTLB_READ_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_DTLB_READ_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_misses"
-                   , (collected_number) perf_events[EV_ID_DTLB_READ_MISS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_DTLB_WRITE_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_access"
-                   , (collected_number) perf_events[EV_ID_DTLB_WRITE_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_DTLB_WRITE_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "write_misses"
-                   , (collected_number) perf_events[EV_ID_DTLB_WRITE_MISS].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_ITLB_READ_ACCESS].updated || perf_events[EV_ID_ITLB_READ_MISS].updated)) {
-        if(unlikely(!ITLB_chart_generated)) {
-            ITLB_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'ITLB cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "itlb_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_ITLB
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-            printf("DIMENSION %s '' absolute 1 1\n", "read_misses");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "itlb_cache"
-        );
-        if(likely(perf_events[EV_ID_ITLB_READ_ACCESS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_access"
-                   , (collected_number) perf_events[EV_ID_ITLB_READ_ACCESS].value
-            );
-        }
-        if(likely(perf_events[EV_ID_ITLB_READ_MISS].updated)) {
-            printf(
-                   "SET %s = %lld\n"
-                   , "read_misses"
-                   , (collected_number) perf_events[EV_ID_ITLB_READ_MISS].value
-            );
-        }
-        printf("END\n");
-    }
-
-    // ------------------------------------------------------------------------
-
-    if(likely(perf_events[EV_ID_PBU_READ_ACCESS].updated)) {
-        if(unlikely(!PBU_chart_generated)) {
-            PBU_chart_generated = 1;
-
-            printf("CHART %s.%s '' 'PBU cache operations' 'events/s' %s '' line %d %d '' %s\n"
-                   , RRD_TYPE_PERF
-                   , "pbu_cache"
-                   , RRD_FAMILY_CACHE
-                   , NETDATA_CHART_PRIO_PERF_PBU
-                   , update_every
-                   , PLUGIN_PERF_NAME
-            );
-            printf("DIMENSION %s '' absolute 1 1\n", "read_access");
-        }
-
-        printf(
-               "BEGIN %s.%s\n"
-               , RRD_TYPE_PERF
-               , "pbu_cache"
-        );
-        printf(
-               "SET %s = %lld\n"
-               , "read_access"
-               , (collected_number) perf_events[EV_ID_PBU_READ_ACCESS].value
-        );
-        printf("END\n");
-    }
-}
-
-void parse_command_line(int argc, char **argv) {
-    int i, plugin_enabled = 0;
-
-    for(i = 1; i < argc ; i++) {
-        if(isdigit(*argv[i]) && !freq) {
-            int n = str2i(argv[i]);
-            if(n > 0 && n < 86400) {
-                freq = n;
-                continue;
-            }
-        }
-        else if(strcmp("version", argv[i]) == 0 || strcmp("-version", argv[i]) == 0 || strcmp("--version", argv[i]) == 0 || strcmp("-v", argv[i]) == 0 || strcmp("-V", argv[i]) == 0) {
-            printf("perf.plugin %s\n", VERSION);
-            exit(0);
-        }
-        else if(strcmp("all", argv[i]) == 0) {
-            struct perf_event *current_event = NULL;
-
-            for(current_event = &perf_events[0]; current_event->id != EV_ID_END; current_event++)
-                current_event->disabled = 0;
-
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("cycles", argv[i]) == 0) {
-            perf_events[EV_ID_CPU_CYCLES].disabled = 0;
-            perf_events[EV_ID_REF_CPU_CYCLES].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("instructions", argv[i]) == 0) {
-            perf_events[EV_ID_INSTRUCTIONS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("branch", argv[i]) == 0) {
-            perf_events[EV_ID_BRANCH_INSTRUCTIONS].disabled = 0;
-            perf_events[EV_ID_BRANCH_MISSES].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("cache", argv[i]) == 0) {
-            perf_events[EV_ID_CACHE_REFERENCES].disabled = 0;
-            perf_events[EV_ID_CACHE_MISSES].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("bus", argv[i]) == 0) {
-            perf_events[EV_ID_BUS_CYCLES].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("stalled", argv[i]) == 0) {
-            perf_events[EV_ID_STALLED_CYCLES_FRONTEND].disabled = 0;
-            perf_events[EV_ID_STALLED_CYCLES_BACKEND].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("migrations", argv[i]) == 0) {
-            perf_events[EV_ID_CPU_MIGRATIONS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("alignment", argv[i]) == 0) {
-            perf_events[EV_ID_ALIGNMENT_FAULTS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("emulation", argv[i]) == 0) {
-            perf_events[EV_ID_EMULATION_FAULTS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("L1D", argv[i]) == 0) {
-            perf_events[EV_ID_L1D_READ_ACCESS].disabled = 0;
-            perf_events[EV_ID_L1D_READ_MISS].disabled = 0;
-            perf_events[EV_ID_L1D_WRITE_ACCESS].disabled = 0;
-            perf_events[EV_ID_L1D_WRITE_MISS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("L1D-prefetch", argv[i]) == 0) {
-            perf_events[EV_ID_L1D_PREFETCH_ACCESS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("L1I", argv[i]) == 0) {
-            perf_events[EV_ID_L1I_READ_ACCESS].disabled = 0;
-            perf_events[EV_ID_L1I_READ_MISS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("LL", argv[i]) == 0) {
-            perf_events[EV_ID_LL_READ_ACCESS].disabled = 0;
-            perf_events[EV_ID_LL_READ_MISS].disabled = 0;
-            perf_events[EV_ID_LL_WRITE_ACCESS].disabled = 0;
-            perf_events[EV_ID_LL_WRITE_MISS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("DTLB", argv[i]) == 0) {
-            perf_events[EV_ID_DTLB_READ_ACCESS].disabled = 0;
-            perf_events[EV_ID_DTLB_READ_MISS].disabled = 0;
-            perf_events[EV_ID_DTLB_WRITE_ACCESS].disabled = 0;
-            perf_events[EV_ID_DTLB_WRITE_MISS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("ITLB", argv[i]) == 0) {
-            perf_events[EV_ID_ITLB_READ_ACCESS].disabled = 0;
-            perf_events[EV_ID_ITLB_READ_MISS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("PBU", argv[i]) == 0) {
-            perf_events[EV_ID_PBU_READ_ACCESS].disabled = 0;
-            plugin_enabled = 1;
-            continue;
-        }
-        else if(strcmp("debug", argv[i]) == 0) {
-            debug = 1;
-            continue;
-        }
-        else if(strcmp("-h", argv[i]) == 0 || strcmp("--help", argv[i]) == 0) {
-            fprintf(stderr,
-                    "\n"
-                    " netdata perf.plugin %s\n"
-                    " Copyright (C) 2019 Netdata Inc.\n"
-                    " Released under GNU General Public License v3 or later.\n"
-                    " All rights reserved.\n"
-                    "\n"
-                    " This program is a data collector plugin for netdata.\n"
-                    "\n"
-                    " Available command line options:\n"
-                    "\n"
-                    "  COLLECTION_FREQUENCY    data collection frequency in seconds\n"
-                    "                          minimum: %d\n"
-                    "\n"
-                    "  all                     enable all charts\n"
-                    "\n"
-                    "  cycles                  enable CPU cycles chart\n"
-                    "\n"
-                    "  instructions            enable Instructions chart\n"
-                    "\n"
-                    "  branch                  enable Branch instructions chart\n"
-                    "\n"
-                    "  cache                   enable Cache operations chart\n"
-                    "\n"
-                    "  bus                     enable Bus cycles chart\n"
-                    "\n"
-                    "  stalled                 enable Stalled frontend and backend cycles chart\n"
-                    "\n"
-                    "  migrations              enable CPU migrations chart\n"
-                    "\n"
-                    "  alignment               enable Alignment faults chart\n"
-                    "\n"
-                    "  emulation               enable Emulation faults chart\n"
-                    "\n"
-                    "  L1D                     enable L1D cache operations chart\n"
-                    "\n"
-                    "  L1D-prefetch            enable L1D prefetch cache operations chart\n"
-                    "\n"
-                    "  L1I                     enable L1I cache operations chart\n"
-                    "\n"
-                    "  LL                      enable LL cache operations chart\n"
-                    "\n"
-                    "  DTLB                    enable DTLB cache operations chart\n"
-                    "\n"
-                    "  ITLB                    enable ITLB cache operations chart\n"
-                    "\n"
-                    "  PBU                     enable PBU cache operations chart\n"
-                    "\n"
-                    "  debug                   enable verbose output\n"
-                    "                          default: disabled\n"
-                    "\n"
-                    "  -v\n"
-                    "  -V\n"
-                    "  --version               print version and exit\n"
-                    "\n"
-                    "  -h\n"
-                    "  --help                  print this message and exit\n"
-                    "\n"
-                    " For more information:\n"
-                    " https://github.com/netdata/netdata/tree/master/collectors/perf.plugin\n"
-                    "\n"
-                    , VERSION
-                    , update_every
-            );
-            exit(1);
-        }
-
-        collector_error("ignoring parameter '%s'", argv[i]);
-    }
-
-    if(!plugin_enabled){
-        collector_info("no charts enabled - nothing to do.");
-        printf("DISABLE\n");
-        exit(1);
-    }
-}
-
-int main(int argc, char **argv) {
-    clocks_init();
-    nd_log_initialize_for_external_plugins("perf.plugin");
-
-    parse_command_line(argc, argv);
-
-    errno = 0;
-
-    if(freq >= update_every)
-        update_every = freq;
-    else if(freq)
-        collector_error("update frequency %d seconds is too small for PERF. Using %d.", freq, update_every);
-
-    if(unlikely(debug)) fprintf(stderr, "perf.plugin: calling perf_init()\n");
-    int perf = !perf_init();
-
-    // ------------------------------------------------------------------------
-    // the main loop
-
-    if(unlikely(debug)) fprintf(stderr, "perf.plugin: starting data collection\n");
-
-    time_t started_t = now_monotonic_sec();
-
-    size_t iteration;
-    usec_t step = update_every * USEC_PER_SEC;
-
-    heartbeat_t hb;
-    heartbeat_init(&hb);
-    for(iteration = 0; 1; iteration++) {
-        usec_t dt = heartbeat_next(&hb, step);
-
-        if(unlikely(netdata_exit)) break;
-
-        if(unlikely(debug && iteration))
-            fprintf(stderr, "perf.plugin: iteration %zu, dt %"PRIu64" usec\n"
-                    , iteration
-                    , dt
-            );
-
-        if(likely(perf)) {
-            if(unlikely(debug)) fprintf(stderr, "perf.plugin: calling perf_collect()\n");
-            perf = !perf_collect();
-
-            if(likely(perf)) {
-                if(unlikely(debug)) fprintf(stderr, "perf.plugin: calling perf_send_metrics()\n");
-                perf_send_metrics();
-            }
-        }
-
-        fflush(stdout);
-
-        // restart check (14400 seconds)
-        if(now_monotonic_sec() - started_t > 14400) break;
-    }
-
-    collector_info("process exiting");
-    perf_free();
-}