Created
July 26, 2021 14:27
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root@batfs0557:~# cat super_cache_scan.bt | |
#!/bin/env /usr/bin/bpftrace | |
#include <linux/types.h> | |
#include <asm-generic/atomic-long.h> | |
#include <linux/shrinker.h> | |
kprobe:super_cache_scan { | |
$sc = (struct shrink_control *) arg1; | |
@nr_to_scan[$sc->nid, comm, probe] = hist($sc->nr_to_scan); | |
} | |
kretprobe:super_cache_scan { | |
@freed[comm, probe] = hist(retval); | |
} | |
root@batfs0557:~# ./super_cache_scan.bt | |
Attaching 2 probes... | |
^C | |
@freed[arc_prune, kretprobe:super_cache_scan]: | |
[0] 261849 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| | |
[1] 35580 |@@@@@@@ | | |
[2, 4) 90 | | | |
[4, 8) 53 | | | |
[8, 16) 68 | | | |
[16, 32) 143 | | | |
[32, 64) 109 | | | |
[64, 128) 10 | | | |
[128, 256) 9 | | | |
[256, 512) 24 | | | |
[512, 1K) 59 | | | |
[1K, 2K) 109 | | | |
[2K, 4K) 45 | | | |
@nr_to_scan[0, arc_prune, kprobe:super_cache_scan]: | |
[8K, 16K) 258 | | | |
[16K, 32K) 432 | | | |
[32K, 64K) 419 | | | |
[64K, 128K) 716 | | | |
[128K, 256K) 1430 |@ | | |
[256K, 512K) 3302 |@@@ | | |
[512K, 1M) 6532 |@@@@@ | | |
[1M, 2M) 13987 |@@@@@@@@@@@@ | | |
[2M, 4M) 19292 |@@@@@@@@@@@@@@@@@ | | |
[4M, 8M) 32063 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | | |
[8M, 16M) 57007 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| | |
[16M, 32M) 13612 |@@@@@@@@@@@@ | | |
@nr_to_scan[1, arc_prune, kprobe:super_cache_scan]: | |
[0] 4 | | | |
[1] 148181 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| | |
[2, 4) 0 | | | |
[4, 8) 0 | | | |
[8, 16) 0 | | | |
[16, 32) 0 | | | |
[32, 64) 0 | | | |
[64, 128) 0 | | | |
[128, 256) 0 | | | |
[256, 512) 0 | | | |
[512, 1K) 0 | | | |
[1K, 2K) 0 | | | |
[2K, 4K) 0 | | | |
[4K, 8K) 0 | | | |
[8K, 16K) 6 | | | |
[16K, 32K) 4 | | | |
[32K, 64K) 3 | | | |
[64K, 128K) 4 | | | |
[128K, 256K) 5 | | | |
[256K, 512K) 4 | | | |
[512K, 1M) 4 | | | |
[1M, 2M) 19 | | | |
[2M, 4M) 76 | | | |
[4M, 8M) 440 | | | |
[8M, 16M) 277 | | | |
[16M, 32M) 23 | | |
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