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initctl: show cgroup cpu.shares and memory.usage in ps command

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2021-03-14 22:16:20 +01:00
parent 9842786453
commit d1e56f300d
1 changed files with 54 additions and 2 deletions
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src/initctl.c
+54 -2
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@@ -723,6 +723,53 @@ static char *pid_comm(int pid, char *buf, size_t len)
return chomp(buf);
}
static uint64_t cgroup_uint64(char *path, char *file)
{
uint64_t val = 0;
char buf[42];
FILE *fp;
fp = fopenf("r", "%s/%s", path, file);
if (!fp)
return val;
if (fgets(buf, sizeof(buf), fp))
val = strtoull(buf, NULL, 10);
fclose(fp);
return val;
}
static int cgroup_shares(char *path)
{
return (int)cgroup_uint64(path, "cpu.shares");
}
static char *cgroup_memuse(char *path)
{
static char buf[32];
int gb, mb, kb, b;
uint64_t num;
num = cgroup_uint64(path, "memory.usage_in_bytes");
gb = num / (1024 * 1024 * 1024);
num = num % (1024 * 1024 * 1024);
mb = num / (1024 * 1024);
num = num % (1024 * 1024);
kb = num / (1024);
b = num % (1024);
if (gb)
snprintf(buf, sizeof(buf), "%d.%dG", gb, mb / 102);
else if (mb)
snprintf(buf, sizeof(buf), "%d.%dM", mb, kb / 102);
else
snprintf(buf, sizeof(buf), "%d.%dk", kb, b / 102);
return buf;
}
static int cgroup_filter(const struct dirent *entry)
{
/* Skip current dir ".", and prev dir "..", from list of files */
@@ -739,6 +786,9 @@ static int cgroup_filter(const struct dirent *entry)
return 1;
}
#define CDIM (plain ? "" : "\e[2m")
#define CRST (plain ? "" : "\e[0m")
static int dump_cgroup(char *path, char *pfx)
{
struct dirent **namelist = NULL;
@@ -784,7 +834,7 @@ static int dump_cgroup(char *path, char *pfx)
printf("%s%s ", pfx, FORK);
snprintf(dir, sizeof(dir), "%s%s ", pfx, PIPE);
}
puts(nm);
printf("%s/ [cpu.shares: %d mem.usage: %s]\n", nm, cgroup_shares(buf), cgroup_memuse(buf));
rc += dump_cgroup(buf, dir);
@@ -809,7 +859,9 @@ static int dump_cgroup(char *path, char *pfx)
/* skip kernel threads for now */
pid_comm(pid, comm, sizeof(comm));
if (pid_cmdline(pid, buf, sizeof(buf)))
printf("%s%s %d %s %s\n", pfx, ++i == num ? END : FORK, pid, comm, buf);
printf("%s%s %s%d %s %s%s\n",
pfx, ++i == num ? END : FORK,
CDIM, pid, comm, buf, CRST);
}
return fclose(fp);