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getdelays: show average CPU/IO/SWAP/RECLAIM delays

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I find it very handy to show the average delays in milliseconds.

Example output (on 100 concurrent dd reading sparse files):

  CPU             count     real total  virtual total    delay total  delay average
                    986     3223509952     3207643301    38863410579         39.415ms
  IO              count    delay total  delay average
                      0              0              0ms
  SWAP            count    delay total  delay average
                      0              0              0ms
  RECLAIM         count    delay total  delay average
                   1059     5131834899              4ms
  dd: read=0, write=0, cancelled_write=0

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Mel Gorman <mel@linux.vnet.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Reviewed-by: Satoru Moriya <satoru.moriya@hds.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wu Fengguang 2011-05-26 16:25:16 -07:00 committed by Linus Torvalds
parent 4ed960b14d
commit 02d54f0926
1 changed files with 20 additions and 13 deletions
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33
Documentation/accounting/getdelays.c
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@ -193,30 +193,37 @@ static int get_family_id(int sd)
return id; return id;
} }
#define average_ms(t, c) (t / 1000000ULL / (c ? c : 1))
static void print_delayacct(struct taskstats *t) static void print_delayacct(struct taskstats *t)
{ {
printf("\n\nCPU %15s%15s%15s%15s\n" printf("\n\nCPU %15s%15s%15s%15s%15s\n"
" %15llu%15llu%15llu%15llu\n" " %15llu%15llu%15llu%15llu%15.3fms\n"
"IO %15s%15s\n" "IO %15s%15s%15s\n"
" %15llu%15llu\n" " %15llu%15llu%15llums\n"
"SWAP %15s%15s\n" "SWAP %15s%15s%15s\n"
" %15llu%15llu\n" " %15llu%15llu%15llums\n"
"RECLAIM %12s%15s\n" "RECLAIM %12s%15s%15s\n"
" %15llu%15llu\n", " %15llu%15llu%15llums\n",
"count", "real total", "virtual total", "delay total", "count", "real total", "virtual total",
"delay total", "delay average",
(unsigned long long)t->cpu_count, (unsigned long long)t->cpu_count,
(unsigned long long)t->cpu_run_real_total, (unsigned long long)t->cpu_run_real_total,
(unsigned long long)t->cpu_run_virtual_total, (unsigned long long)t->cpu_run_virtual_total,
(unsigned long long)t->cpu_delay_total, (unsigned long long)t->cpu_delay_total,
"count", "delay total", average_ms((double)t->cpu_delay_total, t->cpu_count),
"count", "delay total", "delay average",
(unsigned long long)t->blkio_count, (unsigned long long)t->blkio_count,
(unsigned long long)t->blkio_delay_total, (unsigned long long)t->blkio_delay_total,
"count", "delay total", average_ms(t->blkio_delay_total, t->blkio_count),
"count", "delay total", "delay average",
(unsigned long long)t->swapin_count, (unsigned long long)t->swapin_count,
(unsigned long long)t->swapin_delay_total, (unsigned long long)t->swapin_delay_total,
"count", "delay total", average_ms(t->swapin_delay_total, t->swapin_count),
"count", "delay total", "delay average",
(unsigned long long)t->freepages_count, (unsigned long long)t->freepages_count,
(unsigned long long)t->freepages_delay_total); (unsigned long long)t->freepages_delay_total,
average_ms(t->freepages_delay_total, t->freepages_count));
} }
static void task_context_switch_counts(struct taskstats *t) static void task_context_switch_counts(struct taskstats *t)