linux/tools
Yang Jihong acfb65fe1d perf kwork: Add workqueue trace BPF support
Implements workqueue trace bpf function.

Test cases:

  # perf kwork -k workqueue lat -b
  Starting trace, Hit <Ctrl+C> to stop and report
  ^C
    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)addrconf_verify_work        | 0002 |      5.856 ms |         1 |      5.856 ms |     111994.634313 s |     111994.640169 s |
    (w)vmstat_update               | 0001 |      1.247 ms |         1 |      1.247 ms |     111996.462651 s |     111996.463899 s |
    (w)neigh_periodic_work         | 0001 |      1.183 ms |         1 |      1.183 ms |     111996.462789 s |     111996.463973 s |
    (w)neigh_managed_work          | 0001 |      0.989 ms |         2 |      1.635 ms |     111996.462820 s |     111996.464455 s |
    (w)wb_workfn                   | 0000 |      0.667 ms |         1 |      0.667 ms |     111996.384273 s |     111996.384940 s |
    (w)bpf_prog_free_deferred      | 0001 |      0.495 ms |         1 |      0.495 ms |     111986.314201 s |     111986.314696 s |
    (w)mix_interrupt_randomness    | 0002 |      0.421 ms |         6 |      0.749 ms |     111995.927750 s |     111995.928499 s |
    (w)vmstat_shepherd             | 0000 |      0.374 ms |         2 |      0.385 ms |     111991.265242 s |     111991.265627 s |
    (w)e1000_watchdog              | 0002 |      0.356 ms |         5 |      0.390 ms |     111994.528380 s |     111994.528770 s |
    (w)vmstat_update               | 0000 |      0.231 ms |         2 |      0.365 ms |     111996.384407 s |     111996.384772 s |
    (w)flush_to_ldisc              | 0006 |      0.165 ms |         1 |      0.165 ms |     111995.930606 s |     111995.930771 s |
    (w)flush_to_ldisc              | 0000 |      0.094 ms |         2 |      0.095 ms |     111996.460453 s |     111996.460548 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k workqueue rep -b
  Starting trace, Hit <Ctrl+C> to stop and report
  ^C
    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)e1000_watchdog              | 0002 |      0.627 ms |         2 |      0.324 ms |     112002.720665 s |     112002.720989 s |
    (w)flush_to_ldisc              | 0007 |      0.598 ms |         2 |      0.534 ms |     112000.875226 s |     112000.875761 s |
    (w)wq_barrier_func             | 0007 |      0.492 ms |         1 |      0.492 ms |     112000.876981 s |     112000.877473 s |
    (w)flush_to_ldisc              | 0007 |      0.281 ms |         1 |      0.281 ms |     112005.826882 s |     112005.827163 s |
    (w)mix_interrupt_randomness    | 0002 |      0.229 ms |         3 |      0.102 ms |     112005.825671 s |     112005.825774 s |
    (w)vmstat_shepherd             | 0000 |      0.202 ms |         1 |      0.202 ms |     112001.504511 s |     112001.504713 s |
    (w)bpf_prog_free_deferred      | 0001 |      0.181 ms |         1 |      0.181 ms |     112000.883251 s |     112000.883432 s |
    (w)wb_workfn                   | 0007 |      0.130 ms |         1 |      0.130 ms |     112001.505195 s |     112001.505325 s |
    (w)vmstat_update               | 0000 |      0.053 ms |         1 |      0.053 ms |     112001.504763 s |     112001.504815 s |
   --------------------------------------------------------------------------------------------------------------------------------

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-18-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-07-26 16:31:54 -03:00
..
accounting delayacct: track delays from write-protect copy 2022-06-01 15:55:25 -07:00
arch Merge remote-tracking branch 'torvalds/master' into perf/core 2022-07-18 10:36:11 -03:00
bootconfig
bpf bpftool: Use sysfs vmlinux when dumping BTF by ID 2022-05-13 16:07:53 -07:00
build perf build: Stop using __weak bpf_map_create() to handle older libbpf versions 2022-05-26 12:36:56 -03:00
certs tools/certs: Add print-cert-tbs-hash.sh 2022-05-23 18:47:49 +03:00
cgroup
counter
debugging
edid
firewire
firmware
gpio tools: gpio: Add new hardware clock type 2022-05-04 11:06:14 +02:00
hv
iio
include tools lib: Add list_last_entry_or_null() 2022-07-26 16:02:13 -03:00
io_uring
kvm/kvm_stat tools/kvm_stat: fix display of error when multiple processes are found 2022-06-15 08:14:20 -04:00
laptop
leds
lib perf auxtrace: Add machine_pid and vcpu to auxtrace_error 2022-07-20 11:08:17 -03:00
memory-model tools/memory-model/README: Update klitmus7 compat table 2022-05-03 10:12:48 -07:00
objtool Just when you thought that all the speculation bugs were addressed and 2022-07-11 18:15:25 -07:00
pci
pcmcia
perf perf kwork: Add workqueue trace BPF support 2022-07-26 16:31:54 -03:00
power Power management updates for 5.19-rc1 2022-05-24 16:04:25 -07:00
rcu
scripts
spi
testing selftests/net: test nexthop without gw 2022-07-14 14:41:19 +02:00
thermal tools/thermal: remove unneeded semicolon 2022-05-19 12:11:52 +02:00
time
tracing rtla: Remove procps-ng dependency 2022-05-26 15:20:46 -04:00
usb testusb: Fix warning comparing pointer to 0 2022-04-26 13:32:49 +02:00
virtio
vm mm/page-flags: reuse PG_mappedtodisk as PG_anon_exclusive for PageAnon() pages 2022-05-09 18:20:44 -07:00
wmi
Makefile Thermal control updates for 5.19-rc1 2022-05-24 16:19:30 -07:00