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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 02:57:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 02:57:58 +0000 |
commit | be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97 (patch) | |
tree | 9754ff1ca740f6346cf8483ec915d4054bc5da2d /collectors/proc.plugin/sys_block_zram.c | |
parent | Initial commit. (diff) | |
download | netdata-be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97.tar.xz netdata-be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97.zip |
Adding upstream version 1.44.3.upstream/1.44.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/proc.plugin/sys_block_zram.c')
-rw-r--r-- | collectors/proc.plugin/sys_block_zram.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/collectors/proc.plugin/sys_block_zram.c b/collectors/proc.plugin/sys_block_zram.c new file mode 100644 index 00000000..dac7cac0 --- /dev/null +++ b/collectors/proc.plugin/sys_block_zram.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "plugin_proc.h" + +#define PLUGIN_PROC_MODULE_ZRAM_NAME "/sys/block/zram" +#define rrdset_obsolete_and_pointer_null(st) do { if(st) { rrdset_is_obsolete___safe_from_collector_thread(st); (st) = NULL; } } while(st) + +typedef struct mm_stat { + unsigned long long orig_data_size; + unsigned long long compr_data_size; + unsigned long long mem_used_total; + unsigned long long mem_limit; + unsigned long long mem_used_max; + unsigned long long same_pages; + unsigned long long pages_compacted; +} MM_STAT; + +typedef struct zram_device { + procfile *file; + + RRDSET *st_usage; + RRDDIM *rd_compr_data_size; + RRDDIM *rd_metadata_size; + + RRDSET *st_savings; + RRDDIM *rd_original_size; + RRDDIM *rd_savings_size; + + RRDSET *st_comp_ratio; + RRDDIM *rd_comp_ratio; + + RRDSET *st_alloc_efficiency; + RRDDIM *rd_alloc_efficiency; +} ZRAM_DEVICE; + +static int try_get_zram_major_number(procfile *file) { + size_t i; + unsigned int lines = procfile_lines(file); + int id = -1; + char *name = NULL; + for (i = 0; i < lines; i++) + { + if (procfile_linewords(file, i) < 2) + continue; + name = procfile_lineword(file, i, 1); + if (strcmp(name, "zram") == 0) + { + id = str2i(procfile_lineword(file, i, 0)); + if (id == 0) + return -1; + return id; + } + } + return -1; +} + +static inline void init_rrd(const char *name, ZRAM_DEVICE *d, int update_every) { + char chart_name[RRD_ID_LENGTH_MAX + 1]; + + snprintfz(chart_name, RRD_ID_LENGTH_MAX, "zram_usage.%s", name); + d->st_usage = rrdset_create_localhost( + "mem" + , chart_name + , chart_name + , name + , "mem.zram_usage" + , "ZRAM Memory Usage" + , "MiB" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_ZRAM_NAME + , NETDATA_CHART_PRIO_MEM_ZRAM + , update_every + , RRDSET_TYPE_AREA); + d->rd_compr_data_size = rrddim_add(d->st_usage, "compressed", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE); + d->rd_metadata_size = rrddim_add(d->st_usage, "metadata", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE); + rrdlabels_add(d->st_usage->rrdlabels, "device", name, RRDLABEL_SRC_AUTO); + + snprintfz(chart_name, RRD_ID_LENGTH_MAX, "zram_savings.%s", name); + d->st_savings = rrdset_create_localhost( + "mem" + , chart_name + , chart_name + , name + , "mem.zram_savings" + , "ZRAM Memory Savings" + , "MiB" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_ZRAM_NAME + , NETDATA_CHART_PRIO_MEM_ZRAM_SAVINGS + , update_every + , RRDSET_TYPE_AREA); + d->rd_savings_size = rrddim_add(d->st_savings, "savings", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE); + d->rd_original_size = rrddim_add(d->st_savings, "original", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE); + rrdlabels_add(d->st_savings->rrdlabels, "device", name, RRDLABEL_SRC_AUTO); + + snprintfz(chart_name, RRD_ID_LENGTH_MAX, "zram_ratio.%s", name); + d->st_comp_ratio = rrdset_create_localhost( + "mem" + , chart_name + , chart_name + , name + , "mem.zram_ratio" + , "ZRAM Compression Ratio (original to compressed)" + , "ratio" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_ZRAM_NAME + , NETDATA_CHART_PRIO_MEM_ZRAM_RATIO + , update_every + , RRDSET_TYPE_LINE); + d->rd_comp_ratio = rrddim_add(d->st_comp_ratio, "ratio", NULL, 1, 100, RRD_ALGORITHM_ABSOLUTE); + rrdlabels_add(d->st_comp_ratio->rrdlabels, "device", name, RRDLABEL_SRC_AUTO); + + snprintfz(chart_name, RRD_ID_LENGTH_MAX, "zram_efficiency.%s", name); + d->st_alloc_efficiency = rrdset_create_localhost( + "mem" + , chart_name + , chart_name + , name + , "mem.zram_efficiency" + , "ZRAM Efficiency" + , "percentage" + , PLUGIN_PROC_NAME + , PLUGIN_PROC_MODULE_ZRAM_NAME + , NETDATA_CHART_PRIO_MEM_ZRAM_EFFICIENCY + , update_every + , RRDSET_TYPE_LINE); + d->rd_alloc_efficiency = rrddim_add(d->st_alloc_efficiency, "percent", NULL, 1, 10000, RRD_ALGORITHM_ABSOLUTE); + rrdlabels_add(d->st_alloc_efficiency->rrdlabels, "device", name, RRDLABEL_SRC_AUTO); +} + +static int init_devices(DICTIONARY *devices, unsigned int zram_id, int update_every) { + int count = 0; + struct dirent *de; + struct stat st; + procfile *ff = NULL; + ZRAM_DEVICE device; + char filename[FILENAME_MAX + 1]; + + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/dev"); + DIR *dir = opendir(filename); + + if (unlikely(!dir)) + return 0; + while ((de = readdir(dir))) + { + snprintfz(filename, FILENAME_MAX, "%s/dev/%s", netdata_configured_host_prefix, de->d_name); + if (unlikely(stat(filename, &st) != 0)) + { + collector_error("ZRAM : Unable to stat %s: %s", filename, strerror(errno)); + continue; + } + if (major(st.st_rdev) == zram_id) + { + collector_info("ZRAM : Found device %s", filename); + snprintfz(filename, FILENAME_MAX, "%s/sys/block/%s/mm_stat", netdata_configured_host_prefix, de->d_name); + ff = procfile_open(filename, " \t:", PROCFILE_FLAG_DEFAULT); + if (ff == NULL) + { + collector_error("ZRAM : Failed to open %s: %s", filename, strerror(errno)); + continue; + } + device.file = ff; + init_rrd(de->d_name, &device, update_every); + dictionary_set(devices, de->d_name, &device, sizeof(ZRAM_DEVICE)); + count++; + } + } + closedir(dir); + return count; +} + +static void free_device(DICTIONARY *dict, const char *name) +{ + ZRAM_DEVICE *d = (ZRAM_DEVICE*)dictionary_get(dict, name); + collector_info("ZRAM : Disabling monitoring of device %s", name); + rrdset_obsolete_and_pointer_null(d->st_usage); + rrdset_obsolete_and_pointer_null(d->st_savings); + rrdset_obsolete_and_pointer_null(d->st_alloc_efficiency); + rrdset_obsolete_and_pointer_null(d->st_comp_ratio); + dictionary_del(dict, name); +} + +static inline int read_mm_stat(procfile *ff, MM_STAT *stats) { + ff = procfile_readall(ff); + if (!ff) + return -1; + if (procfile_lines(ff) < 1) { + procfile_close(ff); + return -1; + } + if (procfile_linewords(ff, 0) < 7) { + procfile_close(ff); + return -1; + } + + stats->orig_data_size = str2ull(procfile_word(ff, 0), NULL); + stats->compr_data_size = str2ull(procfile_word(ff, 1), NULL); + stats->mem_used_total = str2ull(procfile_word(ff, 2), NULL); + stats->mem_limit = str2ull(procfile_word(ff, 3), NULL); + stats->mem_used_max = str2ull(procfile_word(ff, 4), NULL); + stats->same_pages = str2ull(procfile_word(ff, 5), NULL); + stats->pages_compacted = str2ull(procfile_word(ff, 6), NULL); + return 0; +} + +static int collect_zram_metrics(const DICTIONARY_ITEM *item, void *entry, void *data) { + const char *name = dictionary_acquired_item_name(item); + ZRAM_DEVICE *dev = entry; + DICTIONARY *dict = data; + + MM_STAT mm; + int value; + + if (unlikely(read_mm_stat(dev->file, &mm) < 0)) { + free_device(dict, name); + return -1; + } + + // zram_usage + rrddim_set_by_pointer(dev->st_usage, dev->rd_compr_data_size, mm.compr_data_size); + rrddim_set_by_pointer(dev->st_usage, dev->rd_metadata_size, mm.mem_used_total - mm.compr_data_size); + rrdset_done(dev->st_usage); + + // zram_savings + rrddim_set_by_pointer(dev->st_savings, dev->rd_savings_size, mm.compr_data_size - mm.orig_data_size); + rrddim_set_by_pointer(dev->st_savings, dev->rd_original_size, mm.orig_data_size); + rrdset_done(dev->st_savings); + + // zram_ratio + value = mm.compr_data_size == 0 ? 1 : mm.orig_data_size * 100 / mm.compr_data_size; + rrddim_set_by_pointer(dev->st_comp_ratio, dev->rd_comp_ratio, value); + rrdset_done(dev->st_comp_ratio); + + // zram_efficiency + value = mm.mem_used_total == 0 ? 100 : (mm.compr_data_size * 1000000 / mm.mem_used_total); + rrddim_set_by_pointer(dev->st_alloc_efficiency, dev->rd_alloc_efficiency, value); + rrdset_done(dev->st_alloc_efficiency); + + return 0; +} + +int do_sys_block_zram(int update_every, usec_t dt) { + static procfile *ff = NULL; + static DICTIONARY *devices = NULL; + static int initialized = 0; + static int device_count = 0; + int zram_id = -1; + + (void)dt; + + if (unlikely(!initialized)) + { + initialized = 1; + + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/devices"); + + ff = procfile_open(filename, " \t:", PROCFILE_FLAG_DEFAULT); + if (ff == NULL) + { + collector_error("Cannot read %s", filename); + return 1; + } + ff = procfile_readall(ff); + if (!ff) + return 1; + zram_id = try_get_zram_major_number(ff); + if (zram_id == -1) + { + if (ff != NULL) + procfile_close(ff); + return 1; + } + procfile_close(ff); + + devices = dictionary_create_advanced(DICT_OPTION_SINGLE_THREADED, &dictionary_stats_category_collectors, 0); + device_count = init_devices(devices, (unsigned int)zram_id, update_every); + } + + if (unlikely(device_count < 1)) + return 1; + + dictionary_walkthrough_write(devices, collect_zram_metrics, devices); + return 0; +}
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