mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 09:58:01 +00:00
99910ebbf9
When dumping process statistics, include the the core number the process
was last scheduled. With 'other_config:enable-statistics=true',
Before:
{cpu="28", file_systems="/,8474624,7826220 /workspace,223835956,199394160",
load_average="1.29,1.76,1.33", memory="65861460,27457540,3813488,1999868,0",
process_ovs-vswitchd="4685896,17452,362920,0,383967,383967",
process_ovsdb-server="48088,5172,60,0,384057,384057"}
After:
{cpu="28", file_systems="/,8474624,7826308 /workspace,223835956,199394172",
load_average="1.30,1.04,1.13", memory="65861460,27469176,3815252,1999868,0",
process_ovs-vswitchd="4686020,17360,127380,0,148406,148406,3",
process_ovsdb-server="48096,5212,30,0,148496,148496,4"}
eg:
process vsz , rss , cputime, crashes, booted, uptime, core_id
ovs-vswitchd="4686020,17360, 127380, 0 , 148406, 148406, 3"
Signed-off-by: Bhanuprakash Bodireddy <bhanuprakash.bodireddy@intel.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
401 lines
11 KiB
C
401 lines
11 KiB
C
/* Copyright (c) 2010, 2012, 2013, 2014 Nicira, Inc.
|
||
*
|
||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
* you may not use this file except in compliance with the License.
|
||
* You may obtain a copy of the License at:
|
||
*
|
||
* http://www.apache.org/licenses/LICENSE-2.0
|
||
*
|
||
* Unless required by applicable law or agreed to in writing, software
|
||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
* See the License for the specific language governing permissions and
|
||
* limitations under the License.
|
||
*/
|
||
|
||
#include <config.h>
|
||
|
||
#include "system-stats.h"
|
||
|
||
#include <ctype.h>
|
||
#include <dirent.h>
|
||
#include <errno.h>
|
||
#if HAVE_MNTENT_H
|
||
#include <mntent.h>
|
||
#endif
|
||
#include <stdint.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#if HAVE_SYS_STATVFS_H
|
||
#include <sys/statvfs.h>
|
||
#endif
|
||
#include <unistd.h>
|
||
|
||
#include "daemon.h"
|
||
#include "dirs.h"
|
||
#include "openvswitch/dynamic-string.h"
|
||
#include "openvswitch/json.h"
|
||
#include "latch.h"
|
||
#include "openvswitch/ofpbuf.h"
|
||
#include "ovs-rcu.h"
|
||
#include "ovs-thread.h"
|
||
#include "openvswitch/poll-loop.h"
|
||
#include "openvswitch/shash.h"
|
||
#include "process.h"
|
||
#include "smap.h"
|
||
#include "timeval.h"
|
||
#include "openvswitch/vlog.h"
|
||
|
||
VLOG_DEFINE_THIS_MODULE(system_stats);
|
||
|
||
/* #ifdefs make it a pain to maintain code: you have to try to build both ways.
|
||
* Thus, this file tries to compile as much of the code as possible regardless
|
||
* of the target, by writing "if (LINUX)" instead of "#ifdef __linux__" where
|
||
* this is possible. */
|
||
#ifdef __linux__
|
||
#define LINUX 1
|
||
#include <asm/param.h>
|
||
#else
|
||
#define LINUX 0
|
||
#endif
|
||
|
||
static void
|
||
get_cpu_cores(struct smap *stats)
|
||
{
|
||
long int n_cores = count_cpu_cores();
|
||
if (n_cores > 0) {
|
||
smap_add_format(stats, "cpu", "%ld", n_cores);
|
||
}
|
||
}
|
||
|
||
static void
|
||
get_load_average(struct smap *stats OVS_UNUSED)
|
||
{
|
||
#if HAVE_GETLOADAVG
|
||
double loadavg[3];
|
||
|
||
if (getloadavg(loadavg, 3) == 3) {
|
||
smap_add_format(stats, "load_average", "%.2f,%.2f,%.2f",
|
||
loadavg[0], loadavg[1], loadavg[2]);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
static void
|
||
get_memory_stats(struct smap *stats)
|
||
{
|
||
if (!LINUX) {
|
||
unsigned int pagesize = get_page_size();
|
||
#ifdef _SC_PHYS_PAGES
|
||
long int phys_pages = sysconf(_SC_PHYS_PAGES);
|
||
#else
|
||
long int phys_pages = 0;
|
||
#endif
|
||
#ifdef _SC_AVPHYS_PAGES
|
||
long int avphys_pages = sysconf(_SC_AVPHYS_PAGES);
|
||
#else
|
||
long int avphys_pages = 0;
|
||
#endif
|
||
int mem_total, mem_used;
|
||
|
||
#ifndef _WIN32
|
||
if (pagesize <= 0 || phys_pages <= 0 || avphys_pages <= 0) {
|
||
return;
|
||
}
|
||
|
||
mem_total = phys_pages * (pagesize / 1024);
|
||
mem_used = (phys_pages - avphys_pages) * (pagesize / 1024);
|
||
#else
|
||
MEMORYSTATUS memory_status;
|
||
GlobalMemoryStatus(&memory_status);
|
||
|
||
mem_total = memory_status.dwTotalPhys;
|
||
mem_used = memory_status.dwTotalPhys - memory_status.dwAvailPhys;
|
||
#endif
|
||
smap_add_format(stats, "memory", "%d,%d", mem_total, mem_used);
|
||
} else {
|
||
static const char file_name[] = "/proc/meminfo";
|
||
int mem_used, mem_cache, swap_used;
|
||
int mem_free = 0;
|
||
int buffers = 0;
|
||
int cached = 0;
|
||
int swap_free = 0;
|
||
int mem_total = 0;
|
||
int swap_total = 0;
|
||
struct shash dict;
|
||
char line[128];
|
||
FILE *stream;
|
||
|
||
stream = fopen(file_name, "r");
|
||
if (!stream) {
|
||
VLOG_WARN_ONCE("%s: open failed (%s)",
|
||
file_name, ovs_strerror(errno));
|
||
return;
|
||
}
|
||
|
||
shash_init(&dict);
|
||
shash_add(&dict, "MemTotal", &mem_total);
|
||
shash_add(&dict, "MemFree", &mem_free);
|
||
shash_add(&dict, "Buffers", &buffers);
|
||
shash_add(&dict, "Cached", &cached);
|
||
shash_add(&dict, "SwapTotal", &swap_total);
|
||
shash_add(&dict, "SwapFree", &swap_free);
|
||
while (fgets(line, sizeof line, stream)) {
|
||
char key[16];
|
||
int value;
|
||
|
||
if (ovs_scan(line, "%15[^:]: %u", key, &value)) {
|
||
int *valuep = shash_find_data(&dict, key);
|
||
if (valuep) {
|
||
*valuep = value;
|
||
}
|
||
}
|
||
}
|
||
fclose(stream);
|
||
shash_destroy(&dict);
|
||
|
||
mem_used = mem_total - mem_free;
|
||
mem_cache = buffers + cached;
|
||
swap_used = swap_total - swap_free;
|
||
smap_add_format(stats, "memory", "%d,%d,%d,%d,%d",
|
||
mem_total, mem_used, mem_cache, swap_total, swap_used);
|
||
}
|
||
}
|
||
|
||
static void
|
||
get_process_stats(struct smap *stats)
|
||
{
|
||
#ifndef _WIN32
|
||
struct dirent *de;
|
||
DIR *dir;
|
||
|
||
dir = opendir(ovs_rundir());
|
||
if (!dir) {
|
||
VLOG_ERR_ONCE("%s: open failed (%s)",
|
||
ovs_rundir(), ovs_strerror(errno));
|
||
return;
|
||
}
|
||
|
||
while ((de = readdir(dir)) != NULL) {
|
||
struct process_info pinfo;
|
||
char *file_name;
|
||
char *extension;
|
||
char *key;
|
||
pid_t pid;
|
||
|
||
#ifdef _DIRENT_HAVE_D_TYPE
|
||
if (de->d_type != DT_UNKNOWN && de->d_type != DT_REG) {
|
||
continue;
|
||
}
|
||
#endif
|
||
|
||
extension = strrchr(de->d_name, '.');
|
||
if (!extension || strcmp(extension, ".pid")) {
|
||
continue;
|
||
}
|
||
|
||
file_name = xasprintf("%s/%s", ovs_rundir(), de->d_name);
|
||
pid = read_pidfile(file_name);
|
||
free(file_name);
|
||
if (pid < 0) {
|
||
continue;
|
||
}
|
||
|
||
key = xasprintf("process_%.*s",
|
||
(int) (extension - de->d_name), de->d_name);
|
||
if (!smap_get(stats, key)) {
|
||
if (LINUX && get_process_info(pid, &pinfo)) {
|
||
smap_add_format(stats, key, "%lu,%lu,%lld,%d,%lld,%lld,%d",
|
||
pinfo.vsz, pinfo.rss, pinfo.cputime,
|
||
pinfo.crashes, pinfo.booted, pinfo.uptime,
|
||
pinfo.core_id);
|
||
} else {
|
||
smap_add(stats, key, "");
|
||
}
|
||
}
|
||
free(key);
|
||
}
|
||
|
||
closedir(dir);
|
||
#endif /* _WIN32 */
|
||
}
|
||
|
||
static void
|
||
get_filesys_stats(struct smap *stats OVS_UNUSED)
|
||
{
|
||
#if HAVE_GETMNTENT_R && HAVE_STATVFS
|
||
static const char file_name[] = "/etc/mtab";
|
||
struct mntent mntent;
|
||
struct mntent *me;
|
||
char buf[4096];
|
||
FILE *stream;
|
||
struct ds s;
|
||
|
||
stream = setmntent(file_name, "r");
|
||
if (!stream) {
|
||
VLOG_ERR_ONCE("%s: open failed (%s)", file_name, ovs_strerror(errno));
|
||
return;
|
||
}
|
||
|
||
ds_init(&s);
|
||
while ((me = getmntent_r(stream, &mntent, buf, sizeof buf)) != NULL) {
|
||
unsigned long long int total, free;
|
||
struct statvfs vfs;
|
||
char *p;
|
||
|
||
/* Skip non-local and read-only filesystems. */
|
||
if (strncmp(me->mnt_fsname, "/dev", 4)
|
||
|| !strstr(me->mnt_opts, "rw")) {
|
||
continue;
|
||
}
|
||
|
||
/* Given the mount point we can stat the file system. */
|
||
if (statvfs(me->mnt_dir, &vfs) && vfs.f_flag & ST_RDONLY) {
|
||
/* That's odd... */
|
||
continue;
|
||
}
|
||
|
||
/* Now format the data. */
|
||
if (s.length) {
|
||
ds_put_char(&s, ' ');
|
||
}
|
||
for (p = me->mnt_dir; *p != '\0'; p++) {
|
||
ds_put_char(&s, *p == ' ' || *p == ',' ? '_' : *p);
|
||
}
|
||
total = (unsigned long long int) vfs.f_frsize * vfs.f_blocks / 1024;
|
||
free = (unsigned long long int) vfs.f_frsize * vfs.f_bfree / 1024;
|
||
ds_put_format(&s, ",%llu,%llu", total, total - free);
|
||
}
|
||
endmntent(stream);
|
||
|
||
if (s.length) {
|
||
smap_add(stats, "file_systems", ds_cstr(&s));
|
||
}
|
||
ds_destroy(&s);
|
||
#endif /* HAVE_GETMNTENT_R && HAVE_STATVFS */
|
||
}
|
||
|
||
#define SYSTEM_STATS_INTERVAL (5 * 1000) /* In milliseconds. */
|
||
|
||
static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
|
||
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
|
||
static struct latch latch OVS_GUARDED_BY(mutex);
|
||
static bool enabled;
|
||
static bool started OVS_GUARDED_BY(mutex);
|
||
static struct smap *system_stats OVS_GUARDED_BY(mutex);
|
||
|
||
OVS_NO_RETURN static void *system_stats_thread_func(void *);
|
||
static void discard_stats(void);
|
||
|
||
/* Enables or disables system stats collection, according to 'enable'. */
|
||
void
|
||
system_stats_enable(bool enable)
|
||
{
|
||
if (enabled != enable) {
|
||
ovs_mutex_lock(&mutex);
|
||
if (enable) {
|
||
if (!started) {
|
||
ovs_thread_create("system_stats",
|
||
system_stats_thread_func, NULL);
|
||
latch_init(&latch);
|
||
started = true;
|
||
}
|
||
discard_stats();
|
||
xpthread_cond_signal(&cond);
|
||
}
|
||
enabled = enable;
|
||
ovs_mutex_unlock(&mutex);
|
||
}
|
||
}
|
||
|
||
/* Tries to obtain a new snapshot of system stats every SYSTEM_STATS_INTERVAL
|
||
* milliseconds.
|
||
*
|
||
* When a new snapshot is available (which only occurs if system stats are
|
||
* enabled), returns it as an smap owned by the caller. The caller must use
|
||
* both smap_destroy() and free() to completely free the returned data.
|
||
*
|
||
* When no new snapshot is available, returns NULL. */
|
||
struct smap *
|
||
system_stats_run(void)
|
||
{
|
||
struct smap *stats = NULL;
|
||
|
||
ovs_mutex_lock(&mutex);
|
||
if (system_stats) {
|
||
latch_poll(&latch);
|
||
|
||
if (enabled) {
|
||
stats = system_stats;
|
||
system_stats = NULL;
|
||
} else {
|
||
discard_stats();
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&mutex);
|
||
|
||
return stats;
|
||
}
|
||
|
||
/* Causes poll_block() to wake up when system_stats_run() needs to be
|
||
* called. */
|
||
void
|
||
system_stats_wait(void)
|
||
{
|
||
if (enabled) {
|
||
latch_wait(&latch);
|
||
}
|
||
}
|
||
|
||
static void
|
||
discard_stats(void) OVS_REQUIRES(mutex)
|
||
{
|
||
if (system_stats) {
|
||
smap_destroy(system_stats);
|
||
free(system_stats);
|
||
system_stats = NULL;
|
||
}
|
||
}
|
||
|
||
static void *
|
||
system_stats_thread_func(void *arg OVS_UNUSED)
|
||
{
|
||
pthread_detach(pthread_self());
|
||
|
||
for (;;) {
|
||
long long int next_refresh;
|
||
struct smap *stats;
|
||
|
||
ovs_mutex_lock(&mutex);
|
||
while (!enabled) {
|
||
/* The thread is sleeping, potentially for a long time, and it's
|
||
* not holding RCU protected references, so it makes sense to
|
||
* quiesce */
|
||
ovsrcu_quiesce_start();
|
||
ovs_mutex_cond_wait(&cond, &mutex);
|
||
ovsrcu_quiesce_end();
|
||
}
|
||
ovs_mutex_unlock(&mutex);
|
||
|
||
stats = xmalloc(sizeof *stats);
|
||
smap_init(stats);
|
||
get_cpu_cores(stats);
|
||
get_load_average(stats);
|
||
get_memory_stats(stats);
|
||
get_process_stats(stats);
|
||
get_filesys_stats(stats);
|
||
|
||
ovs_mutex_lock(&mutex);
|
||
discard_stats();
|
||
system_stats = stats;
|
||
latch_set(&latch);
|
||
ovs_mutex_unlock(&mutex);
|
||
|
||
next_refresh = time_msec() + SYSTEM_STATS_INTERVAL;
|
||
do {
|
||
poll_timer_wait_until(next_refresh);
|
||
poll_block();
|
||
} while (time_msec() < next_refresh);
|
||
}
|
||
}
|