diff options
| author | Wang Yaxin <wang.yaxin@zte.com.cn> | 2024-12-20 17:31:05 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-01-12 20:21:16 -0800 |
| commit | f65c64f311ee2f1ddc1eb395ed8b20e6b9d14e85 (patch) | |
| tree | ca352bc26ec78239c7af48bfb5ecf57436808b85 /include/uapi/linux | |
| parent | 7e70433c2bf542e10c6e40084d8adb7325dc71cb (diff) | |
delayacct: add delay min to record delay peak
Delay accounting can now calculate the average delay of processes, detect
the overall system load, and also record the 'delay max' to identify
potential abnormal delays. However, 'delay min' can help us identify
another useful delay peak. By comparing the difference between 'delay
max' and 'delay min', we can understand the optimization space for
latency, providing a reference for the optimization of latency
performance.
Use case
=========
bash-4.4# ./getdelays -d -t 242
print delayacct stats ON
TGID 242
CPU count real total virtual total delay total delay average delay max delay min
39 156000000 156576579 2111069 0.054ms 0.212296ms 0.031307ms
IO count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
SWAP count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
RECLAIM count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
THRASHING count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
COMPACT count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
WPCOPY count delay total delay average delay max delay min
156 11215873 0.072ms 0.207403ms 0.033913ms
IRQ count delay total delay average delay max delay min
0 0 0.000ms 0.000000ms 0.000000ms
Link: https://lkml.kernel.org/r/20241220173105906EOdsPhzjMLYNJJBqgz1ga@zte.com.cn
Co-developed-by: Wang Yong <wang.yong12@zte.com.cn>
Signed-off-by: Wang Yong <wang.yong12@zte.com.cn>
Co-developed-by: xu xin <xu.xin16@zte.com.cn>
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Signed-off-by: Wang Yaxin <wang.yaxin@zte.com.cn>
Co-developed-by: Kun Jiang <jiang.kun2@zte.com.cn>
Signed-off-by: Kun Jiang <jiang.kun2@zte.com.cn>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Fan Yu <fan.yu9@zte.com.cn>
Cc: Peilin He <he.peilin@zte.com.cn>
Cc: tuqiang <tu.qiang35@zte.com.cn>
Cc: ye xingchen <ye.xingchen@zte.com.cn>
Cc: Yunkai Zhang <zhang.yunkai@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/taskstats.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/uapi/linux/taskstats.h b/include/uapi/linux/taskstats.h index e0d1c6fc9f3b..934e20ef7f79 100644 --- a/include/uapi/linux/taskstats.h +++ b/include/uapi/linux/taskstats.h @@ -73,6 +73,7 @@ struct taskstats { __u64 cpu_count __attribute__((aligned(8))); __u64 cpu_delay_total; __u64 cpu_delay_max; + __u64 cpu_delay_min; /* Following four fields atomically updated using task->delays->lock */ @@ -82,11 +83,13 @@ struct taskstats { __u64 blkio_count; __u64 blkio_delay_total; __u64 blkio_delay_max; + __u64 blkio_delay_min; /* Delay waiting for page fault I/O (swap in only) */ __u64 swapin_count; __u64 swapin_delay_total; __u64 swapin_delay_max; + __u64 swapin_delay_min; /* cpu "wall-clock" running time * On some architectures, value will adjust for cpu time stolen @@ -170,11 +173,13 @@ struct taskstats { __u64 freepages_count; __u64 freepages_delay_total; __u64 freepages_delay_max; + __u64 freepages_delay_min; /* Delay waiting for thrashing page */ __u64 thrashing_count; __u64 thrashing_delay_total; __u64 thrashing_delay_max; + __u64 thrashing_delay_min; /* v10: 64-bit btime to avoid overflow */ __u64 ac_btime64; /* 64-bit begin time */ @@ -183,6 +188,7 @@ struct taskstats { __u64 compact_count; __u64 compact_delay_total; __u64 compact_delay_max; + __u64 compact_delay_min; /* v12 begin */ __u32 ac_tgid; /* thread group ID */ @@ -205,11 +211,13 @@ struct taskstats { __u64 wpcopy_count; __u64 wpcopy_delay_total; __u64 wpcopy_delay_max; + __u64 wpcopy_delay_min; /* v14: Delay waiting for IRQ/SOFTIRQ */ __u64 irq_count; __u64 irq_delay_total; __u64 irq_delay_max; + __u64 irq_delay_min; /* v15: add Delay max */ }; |