diff options
Diffstat (limited to 'collectors/proc.plugin/proc_pressure.c')
| -rw-r--r-- | collectors/proc.plugin/proc_pressure.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/collectors/proc.plugin/proc_pressure.c b/collectors/proc.plugin/proc_pressure.c new file mode 100644 index 0000000..4a40b4a --- /dev/null +++ b/collectors/proc.plugin/proc_pressure.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "plugin_proc.h" + +#define PLUGIN_PROC_MODULE_PRESSURE_NAME "/proc/pressure" +#define CONFIG_SECTION_PLUGIN_PROC_PRESSURE "plugin:" PLUGIN_PROC_CONFIG_NAME ":" PLUGIN_PROC_MODULE_PRESSURE_NAME + +// linux calculates this every 2 seconds, see kernel/sched/psi.c PSI_FREQ +#define MIN_PRESSURE_UPDATE_EVERY 2 + + +static struct pressure resources[PRESSURE_NUM_RESOURCES] = { + { + .some = { .id = "cpu_pressure", .title = "CPU Pressure" }, + }, + { + .some = { .id = "memory_some_pressure", .title = "Memory Pressure" }, + .full = { .id = "memory_full_pressure", .title = "Memory Full Pressure" }, + }, + { + .some = { .id = "io_some_pressure", .title = "I/O Pressure" }, + .full = { .id = "io_full_pressure", .title = "I/O Full Pressure" }, + }, +}; + +static struct { + procfile *pf; + const char *name; // metric file name + const char *family; // webui section name + int section_priority; +} resource_info[PRESSURE_NUM_RESOURCES] = { + { .name = "cpu", .family = "cpu", .section_priority = NETDATA_CHART_PRIO_SYSTEM_CPU }, + { .name = "memory", .family = "ram", .section_priority = NETDATA_CHART_PRIO_SYSTEM_RAM }, + { .name = "io", .family = "disk", .section_priority = NETDATA_CHART_PRIO_SYSTEM_IO }, +}; + +void update_pressure_chart(struct pressure_chart *chart) { + rrddim_set_by_pointer(chart->st, chart->rd10, (collected_number)(chart->value10 * 100)); + rrddim_set_by_pointer(chart->st, chart->rd60, (collected_number) (chart->value60 * 100)); + rrddim_set_by_pointer(chart->st, chart->rd300, (collected_number) (chart->value300 * 100)); + + rrdset_done(chart->st); +} + +int do_proc_pressure(int update_every, usec_t dt) { + int fail_count = 0; + int i; + + static usec_t next_pressure_dt = 0; + static char *base_path = NULL; + + update_every = (update_every < MIN_PRESSURE_UPDATE_EVERY) ? MIN_PRESSURE_UPDATE_EVERY : update_every; + + if (next_pressure_dt <= dt) { + next_pressure_dt = update_every * USEC_PER_SEC; + } else { + next_pressure_dt -= dt; + return 0; + } + + if (unlikely(!base_path)) { + base_path = config_get(CONFIG_SECTION_PLUGIN_PROC_PRESSURE, "base path of pressure metrics", "/proc/pressure"); + } + + for (i = 0; i < PRESSURE_NUM_RESOURCES; i++) { + procfile *ff = resource_info[i].pf; + int do_some = resources[i].some.enabled, do_full = resources[i].full.enabled; + + if (unlikely(!ff)) { + char filename[FILENAME_MAX + 1]; + char config_key[CONFIG_MAX_NAME + 1]; + + snprintfz(filename + , FILENAME_MAX + , "%s%s/%s" + , netdata_configured_host_prefix + , base_path + , resource_info[i].name); + + snprintfz(config_key, CONFIG_MAX_NAME, "enable %s some pressure", resource_info[i].name); + do_some = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_PRESSURE, config_key, CONFIG_BOOLEAN_YES); + resources[i].some.enabled = do_some; + if (resources[i].full.id) { + snprintfz(config_key, CONFIG_MAX_NAME, "enable %s full pressure", resource_info[i].name); + do_full = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_PRESSURE, config_key, CONFIG_BOOLEAN_YES); + resources[i].full.enabled = do_full; + } + + ff = procfile_open(filename, " =", PROCFILE_FLAG_DEFAULT); + if (unlikely(!ff)) { + error("Cannot read pressure information from %s.", filename); + fail_count++; + continue; + } + } + + ff = procfile_readall(ff); + resource_info[i].pf = ff; + if (unlikely(!ff)) { + fail_count++; + continue; + } + + size_t lines = procfile_lines(ff); + if (unlikely(lines < 1)) { + error("%s has no lines.", procfile_filename(ff)); + fail_count++; + continue; + } + + struct pressure_chart *chart; + if (do_some) { + chart = &resources[i].some; + if (unlikely(!chart->st)) { + chart->st = rrdset_create_localhost( + "system" + , chart->id + , NULL + , resource_info[i].family + , NULL + , chart->title + , "percentage" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_PRESSURE_NAME + , resource_info[i].section_priority + 40 + , update_every + , RRDSET_TYPE_LINE + ); + chart->rd10 = rrddim_add(chart->st, "some 10", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + chart->rd60 = rrddim_add(chart->st, "some 60", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + chart->rd300 = rrddim_add(chart->st, "some 300", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + } else { + rrdset_next(chart->st); + } + + chart->value10 = strtod(procfile_lineword(ff, 0, 2), NULL); + chart->value60 = strtod(procfile_lineword(ff, 0, 4), NULL); + chart->value300 = strtod(procfile_lineword(ff, 0, 6), NULL); + update_pressure_chart(chart); + } + + if (do_full && lines > 2) { + chart = &resources[i].full; + if (unlikely(!chart->st)) { + chart->st = rrdset_create_localhost( + "system" + , chart->id + , NULL + , resource_info[i].family + , NULL + , chart->title + , "percentage" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_PRESSURE_NAME + , resource_info[i].section_priority + 45 + , update_every + , RRDSET_TYPE_LINE + ); + chart->rd10 = rrddim_add(chart->st, "full 10", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + chart->rd60 = rrddim_add(chart->st, "full 60", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + chart->rd300 = rrddim_add(chart->st, "full 300", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + } else { + rrdset_next(chart->st); + } + + chart->value10 = strtod(procfile_lineword(ff, 1, 2), NULL); + chart->value60 = strtod(procfile_lineword(ff, 1, 4), NULL); + chart->value300 = strtod(procfile_lineword(ff, 1, 6), NULL); + update_pressure_chart(chart); + } + } + + if (PRESSURE_NUM_RESOURCES == fail_count) { + return 1; + } + + return 0; +} |