summaryrefslogtreecommitdiff
path: root/log.c
diff options
context:
space:
mode:
authorAnas Nashif <anas.nashif@intel.com>2012-10-30 20:14:52 (GMT)
committerAnas Nashif <anas.nashif@intel.com>2012-10-30 20:14:52 (GMT)
commite4ea3febc82023700035016f0f66426682b87a8a (patch)
treef0861f825ef37ef8e90541e6543397539bc7319f /log.c
downloadbootchart-e4ea3febc82023700035016f0f66426682b87a8a.zip
bootchart-e4ea3febc82023700035016f0f66426682b87a8a.tar.gz
bootchart-e4ea3febc82023700035016f0f66426682b87a8a.tar.bz2
Imported Upstream version 1.20upstream/1.20upstream
Diffstat (limited to 'log.c')
-rw-r--r--log.c420
1 files changed, 420 insertions, 0 deletions
diff --git a/log.c b/log.c
new file mode 100644
index 0000000..be65e97
--- /dev/null
+++ b/log.c
@@ -0,0 +1,420 @@
+/*
+ * log.c
+ *
+ * Copyright (c) 2009 Intel Coproration
+ * Authors:
+ * Auke Kok <auke-jan.h.kok@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#define _GNU_SOURCE 1
+#include <unistd.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <time.h>
+
+
+#include "bootchart.h"
+
+/*
+ * Alloc a static 4k buffer for stdio - primarily used to increase
+ * PSS buffering from the default 1k stdin buffer to reduce
+ * read() overhead.
+ */
+static char smaps_buf[4096];
+DIR *proc;
+
+
+double gettime_ns(void)
+{
+ struct timespec now;
+
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ return (now.tv_sec + (now.tv_nsec / 1000000000.0));
+}
+
+
+void log_uptime(void)
+{
+ FILE *f;
+ char str[32];
+ double uptime;
+
+ f = fopen("/proc/uptime", "r");
+ if (!f)
+ return;
+ if (!fscanf(f, "%s %*s", str)) {
+ fclose(f);
+ return;
+ }
+ fclose(f);
+ uptime = strtod(str, NULL);
+
+ log_start = gettime_ns();
+
+ /* start graph at kernel boot time */
+ if (relative)
+ graph_start = log_start;
+ else
+ graph_start = log_start - uptime;
+}
+
+
+static char *bufgetline(char *buf)
+{
+ char *c;
+
+ if (!buf)
+ return NULL;
+
+ c = strchr(buf, '\n');
+ if (c)
+ c++;
+ return c;
+}
+
+
+void log_sample(int sample)
+{
+ static int vmstat;
+ static int schedstat;
+ FILE *stat;
+ char buf[4095];
+ char key[256];
+ char val[256];
+ char rt[256];
+ char wt[256];
+ char *m;
+ int c;
+ int p;
+ int mod;
+ static int e_fd;
+ ssize_t s;
+ ssize_t n;
+ struct dirent *ent;
+
+ if (!vmstat) {
+ /* block stuff */
+ vmstat = open("/proc/vmstat", O_RDONLY);
+ if (vmstat == -1) {
+ perror("open /proc/vmstat");
+ exit (EXIT_FAILURE);
+ }
+ }
+
+ n = pread(vmstat, buf, sizeof(buf) - 1, 0);
+ if (n <= 0) {
+ close(vmstat);
+ return;
+ }
+ buf[n] = '\0';
+
+ m = buf;
+ while (m) {
+ if (sscanf(m, "%s %s", key, val) < 2)
+ goto vmstat_next;
+ if (!strcmp(key, "pgpgin"))
+ blockstat[sample].bi = atoi(val);
+ if (!strcmp(key, "pgpgout")) {
+ blockstat[sample].bo = atoi(val);
+ break;
+ }
+vmstat_next:
+ m = bufgetline(m);
+ if (!m)
+ break;
+ }
+
+ if (!schedstat) {
+ /* overall CPU utilization */
+ schedstat = open("/proc/schedstat", O_RDONLY);
+ if (schedstat == -1) {
+ perror("open /proc/schedstat");
+ exit (EXIT_FAILURE);
+ }
+ }
+
+ n = pread(schedstat, buf, sizeof(buf) - 1, 0);
+ if (n <= 0) {
+ close(schedstat);
+ return;
+ }
+ buf[n] = '\0';
+
+ m = buf;
+ while (m) {
+ if (sscanf(m, "%s %*s %*s %*s %*s %*s %*s %s %s", key, rt, wt) < 3)
+ goto schedstat_next;
+
+ if (strstr(key, "cpu")) {
+ c = atoi((const char*)(key+3));
+ if (c > MAXCPUS)
+ /* Oops, we only have room for MAXCPUS data */
+ break;
+ cpustat[c].sample[sample].runtime = atoll(rt);
+ cpustat[c].sample[sample].waittime = atoll(wt);
+
+ if (c == cpus)
+ cpus = c + 1;
+ }
+schedstat_next:
+ m = bufgetline(m);
+ if (!m)
+ break;
+ }
+
+ if (entropy) {
+ if (!e_fd) {
+ e_fd = open("/proc/sys/kernel/random/entropy_avail", O_RDONLY);
+ }
+
+ if (e_fd) {
+ n = pread(e_fd, buf, sizeof(buf) - 1, 0);
+ if (n > 0)
+ entropy_avail[sample] = atoi(buf);
+ }
+ }
+
+ /* all the per-process stuff goes here */
+ if (!proc) {
+ /* find all processes */
+ proc = opendir("/proc");
+ if (!proc)
+ return;
+ } else {
+ rewinddir(proc);
+ }
+
+ while ((ent = readdir(proc)) != NULL) {
+ char filename[PATH_MAX];
+ int pid;
+ struct ps_struct *ps;
+
+ if ((ent->d_name[0] < '0') || (ent->d_name[0] > '9'))
+ continue;
+
+ pid = atoi(ent->d_name);
+
+ if (pid >= MAXPIDS)
+ continue;
+
+ ps = ps_first;
+ while (ps->next_ps) {
+ ps = ps->next_ps;
+ if (ps->pid == pid)
+ break;
+ }
+
+ /* end of our LL? then append a new record */
+ if (ps->pid != pid) {
+ char t[32];
+ struct ps_struct *parent;
+
+ ps->next_ps = malloc(sizeof(struct ps_struct));
+ if (!ps->next_ps) {
+ perror("malloc(ps_struct)");
+ exit (EXIT_FAILURE);
+ }
+ memset(ps->next_ps, 0, sizeof(struct ps_struct));
+ ps = ps->next_ps;
+ ps->pid = pid;
+
+ ps->sample = malloc(sizeof(struct ps_sched_struct) * (len + 1));
+ if (!ps->sample) {
+ perror("malloc(ps_struct)");
+ exit (EXIT_FAILURE);
+ }
+ memset(ps->sample, 0, sizeof(struct ps_sched_struct) * (len + 1));
+
+ pscount++;
+
+ /* mark our first sample */
+ ps->first = sample;
+
+ /* get name, start time */
+ if (!ps->sched) {
+ sprintf(filename, "/proc/%d/sched", pid);
+ ps->sched = open(filename, O_RDONLY);
+ if (ps->sched == -1)
+ continue;
+ }
+
+ s = pread(ps->sched, buf, sizeof(buf) - 1, 0);
+ if (s <= 0) {
+ close(ps->sched);
+ continue;
+ }
+
+ if (!sscanf(buf, "%s %*s %*s", key))
+ continue;
+
+ strncpy(ps->name, key, 16);
+ /* discard line 2 */
+ m = bufgetline(buf);
+ if (!m)
+ continue;
+
+ m = bufgetline(m);
+ if (!m)
+ continue;
+
+ if (!sscanf(m, "%*s %*s %s", t))
+ continue;
+
+ ps->starttime = strtod(t, NULL) / 1000.0;
+
+ /* ppid */
+ sprintf(filename, "/proc/%d/stat", pid);
+ stat = fopen(filename, "r");
+ if (!stat)
+ continue;
+ if (!fscanf(stat, "%*s %*s %*s %i", &p)) {
+ fclose(stat);
+ continue;
+ }
+ fclose(stat);
+ ps->ppid = p;
+
+ /*
+ * setup child pointers
+ *
+ * these are used to paint the tree coherently later
+ * each parent has a LL of children, and a LL of siblings
+ */
+ if (pid == 1)
+ continue; /* nothing to do for init atm */
+
+ /* kthreadd has ppid=0, which breaks our tree ordering */
+ if (ps->ppid == 0)
+ ps->ppid = 1;
+
+ parent = ps_first;
+ while ((parent->next_ps && parent->pid != ps->ppid))
+ parent = parent->next_ps;
+
+ if ((!parent) || (parent->pid != ps->ppid)) {
+ /* orphan */
+ ps->ppid = 1;
+ parent = ps_first->next_ps;
+ }
+
+ ps->parent = parent;
+
+ if (!parent->children) {
+ /* it's the first child */
+ parent->children = ps;
+ } else {
+ /* walk all children and append */
+ struct ps_struct *children;
+ children = parent->children;
+ while (children->next)
+ children = children->next;
+ children->next = ps;
+ }
+ }
+
+ /* else -> found pid, append data in ps */
+
+ /* below here is all continuous logging parts - we get here on every
+ * iteration */
+
+ /* rt, wt */
+ if (!ps->schedstat) {
+ sprintf(filename, "/proc/%d/schedstat", pid);
+ ps->schedstat = open(filename, O_RDONLY);
+ if (ps->schedstat == -1)
+ continue;
+ }
+
+ if (pread(ps->schedstat, buf, sizeof(buf) - 1, 0) <= 0) {
+ /* clean up our file descriptors - assume that the process exited */
+ close(ps->schedstat);
+ if (ps->sched)
+ close(ps->sched);
+ //if (ps->smaps)
+ // fclose(ps->smaps);
+ continue;
+ }
+ if (!sscanf(buf, "%s %s %*s", rt, wt))
+ continue;
+
+ ps->last = sample;
+ ps->sample[sample].runtime = atoll(rt);
+ ps->sample[sample].waittime = atoll(wt);
+
+ ps->total = (ps->sample[ps->last].runtime
+ - ps->sample[ps->first].runtime)
+ / 1000000000.0;
+
+ if (!pss)
+ goto catch_rename;
+ /* Pss */
+ if (!ps->smaps) {
+ sprintf(filename, "/proc/%d/smaps", pid);
+ ps->smaps = fopen(filename, "r");
+ setvbuf(ps->smaps, smaps_buf, _IOFBF, sizeof(smaps_buf));
+ if (!ps->smaps)
+ continue;
+ } else {
+ rewind(ps->smaps);
+ }
+
+ while (1) {
+ int p;
+
+ /* skip one line, this contains the object mapped */
+ if (fgets(buf, sizeof(buf), ps->smaps) == NULL)
+ break;
+ /* then there's a 28 char 14 line block */
+ if (fread(buf, 1, 28 * 14, ps->smaps) != 28 * 14)
+ break;
+
+ p = atoi(&buf[61]);
+ ps->sample[sample].pss += p;
+ }
+
+ if (ps->sample[sample].pss > ps->pss_max)
+ ps->pss_max = ps->sample[sample].pss;
+
+catch_rename:
+ /* catch process rename, try to randomize time */
+ mod = (hz < 4.0) ? 4.0 : (hz / 4.0);
+ if (((samples - ps->first) + pid) % (int)(mod) == 0) {
+
+ /* re-fetch name */
+ /* get name, start time */
+ if (!ps->sched) {
+ sprintf(filename, "/proc/%d/sched", pid);
+ ps->sched = open(filename, O_RDONLY);
+ if (ps->sched == -1)
+ continue;
+ }
+ if (pread(ps->sched, buf, sizeof(buf) - 1, 0) <= 0) {
+ /* clean up file descriptors */
+ close(ps->sched);
+ if (ps->schedstat)
+ close(ps->schedstat);
+ //if (ps->smaps)
+ // fclose(ps->smaps);
+ continue;
+ }
+
+ if (!sscanf(buf, "%s %*s %*s", key))
+ continue;
+
+ strncpy(ps->name, key, 16);
+ }
+ }
+}
+