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authorKurt Van Dijck <dev.kurt@vandijck-laurijssen.be>2017-09-14 23:58:38 +0200
committerAaron Marcher <me@drkhsh.at>2017-09-16 13:46:40 +0200
commit72a5e52a35d0a133cafa1a7b5b86f4549589965d (patch)
tree8604390fb10673b7979bd4768ac2b513a910d944 /slstatus.c
parent57aa6a51647972094021e65d23099b105f00f37a (diff)
slstatus: add cpu_iowait
This commit introduces the cpu_iowait item, this is the percentage of cpu time spent waiting on disks. High numbers typically indicate that your system is not responsive due to disk IO. This commit also avoid sleeping inside the cpu_perc and cpu_iowait functions: waiting in either one implies lost info for the other. Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Diffstat (limited to 'slstatus.c')
-rw-r--r--slstatus.c44
1 files changed, 33 insertions, 11 deletions
diff --git a/slstatus.c b/slstatus.c
index e69423b..cbc35a4 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -40,6 +40,7 @@ static const char *battery_power(const char *bat);
static const char *battery_state(const char *bat);
static const char *cpu_freq(void);
static const char *cpu_perc(void);
+static const char *cpu_iowait(void);
static const char *datetime(const char *fmt);
static const char *disk_free(const char *mnt);
static const char *disk_perc(const char *mnt);
@@ -177,26 +178,47 @@ cpu_freq(void)
static const char *
cpu_perc(void)
{
- struct timespec delay;
int perc;
- long double a[4], b[4];
+ static long double a[7];
+ static int valid;
+ long double b[7];
- if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2],
- &a[3]) != 4) {
+ memcpy(b, a, sizeof(b));
+ if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2],
+ &a[3], &a[4], &a[5], &a[6]) != 7) {
return unknown_str;
}
+ if (!valid) {
+ valid = 1;
+ return unknown_str;
+ }
+
+ perc = 100 * ((b[0]+b[1]+b[2]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[5]+a[6])) /
+ ((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
- delay.tv_sec = (interval / 2) / 1000;
- delay.tv_nsec = ((interval / 2) % 1000) * 1000000;
- nanosleep(&delay, NULL);
+ return bprintf("%d", perc);
+}
- if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2],
- &b[3]) != 4) {
+static const char *
+cpu_iowait(void)
+{
+ int perc;
+ static int valid;
+ static long double a[7];
+ long double b[7];
+
+ memcpy(b, a, sizeof(b));
+ if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2],
+ &a[3], &a[4], &a[5], &a[6]) != 7) {
+ return unknown_str;
+ }
+ if (!valid) {
+ valid = 1;
return unknown_str;
}
- perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) /
- ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
+ perc = 100 * ((b[4]) - (a[4])) /
+ ((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
return bprintf("%d", perc);
}