diff options
Diffstat (limited to 'src/bootchart')
| -rw-r--r-- | src/bootchart/store.c | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/src/bootchart/store.c b/src/bootchart/store.c index 00439f0409..caa97b97fc 100644 --- a/src/bootchart/store.c +++ b/src/bootchart/store.c @@ -37,6 +37,7 @@ #include "store.h" #include "bootchart.h" #include "cgroup-util.h" +#include "fileio.h" /* * Alloc a static 4k buffer for stdio - primarily used to increase @@ -97,13 +98,14 @@ int log_sample(DIR *proc, int *cpus) { static int vmstat = -1; - static int schedstat = -1; + _cleanup_free_ char *buf_schedstat = NULL; char buf[4096]; char key[256]; char val[256]; char rt[256]; char wt[256]; char *m; + int r; int c; int p; int mod; @@ -156,27 +158,13 @@ vmstat_next: break; } - if (schedstat < 0) { - /* overall CPU utilization */ - schedstat = openat(procfd, "schedstat", O_RDONLY|O_CLOEXEC); - if (schedstat < 0) - return log_error_errno(errno, "Failed to open /proc/schedstat (requires CONFIG_SCHEDSTATS=y in kernel config): %m"); - } + /* Parse "/proc/schedstat" for overall CPU utilization */ + r = read_full_file("/proc/schedstat", &buf_schedstat, NULL); + if (r < 0) + return log_error_errno(r, "Unable to read schedstat: %m"); - n = pread(schedstat, buf, sizeof(buf) - 1, 0); - if (n <= 0) { - schedstat = safe_close(schedstat); - if (n < 0) - return -errno; - return -ENODATA; - } - - buf[n] = '\0'; - - m = buf; + m = buf_schedstat; while (m) { - int r; - if (sscanf(m, "%s %*s %*s %*s %*s %*s %*s %s %s", key, rt, wt) < 3) goto schedstat_next; @@ -238,7 +226,6 @@ schedstat_next: _cleanup_fclose_ FILE *st = NULL; char t[32]; struct ps_struct *parent; - int r; ps->next_ps = new0(struct ps_struct, 1); if (!ps->next_ps) @@ -427,7 +414,6 @@ schedstat_next: return -errno; } FOREACH_DIRENT(ent, taskdir, break) { - int r; int tid = -1; _cleanup_close_ int tid_schedstat = -1; long long delta_rt; |