Leave just some forward declarations for pointers, move the includes to
where they are really needed.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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>
Implements softirq trace bpf function.
Test cases:
Trace softirq latency without filter:
# perf kwork -k softirq 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 |
--------------------------------------------------------------------------------------------------------------------------------
(s)RCU:9 | 0005 | 0.281 ms | 3 | 0.338 ms | 111295.752222 s | 111295.752560 s |
(s)RCU:9 | 0002 | 0.262 ms | 24 | 1.400 ms | 111301.335986 s | 111301.337386 s |
(s)SCHED:7 | 0005 | 0.177 ms | 14 | 0.212 ms | 111295.752270 s | 111295.752481 s |
(s)RCU:9 | 0007 | 0.161 ms | 47 | 2.022 ms | 111295.402159 s | 111295.404181 s |
(s)NET_RX:3 | 0003 | 0.149 ms | 12 | 1.261 ms | 111301.192964 s | 111301.194225 s |
(s)TIMER:1 | 0001 | 0.105 ms | 9 | 0.198 ms | 111301.180191 s | 111301.180389 s |
... <SNIP> ...
(s)NET_RX:3 | 0002 | 0.098 ms | 6 | 0.124 ms | 111295.403760 s | 111295.403884 s |
(s)SCHED:7 | 0001 | 0.093 ms | 19 | 0.242 ms | 111301.180256 s | 111301.180498 s |
(s)SCHED:7 | 0007 | 0.078 ms | 15 | 0.188 ms | 111300.064226 s | 111300.064415 s |
(s)SCHED:7 | 0004 | 0.077 ms | 11 | 0.213 ms | 111301.361759 s | 111301.361973 s |
(s)SCHED:7 | 0000 | 0.063 ms | 33 | 0.805 ms | 111295.401811 s | 111295.402616 s |
(s)SCHED:7 | 0003 | 0.063 ms | 14 | 0.085 ms | 111301.192255 s | 111301.192340 s |
--------------------------------------------------------------------------------------------------------------------------------
Trace softirq latency with cpu filter:
# perf kwork -k softirq lat -b -C 1
Starting trace, Hit <Ctrl+C> to stop and report
^C
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)RCU:9 | 0001 | 0.178 ms | 5 | 0.572 ms | 111435.534135 s | 111435.534707 s |
--------------------------------------------------------------------------------------------------------------------------------
Trace softirq latency with name filter:
# perf kwork -k softirq lat -b -n SCHED
Starting trace, Hit <Ctrl+C> to stop and report
^C
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)SCHED:7 | 0001 | 0.295 ms | 15 | 2.183 ms | 111452.534950 s | 111452.537133 s |
(s)SCHED:7 | 0002 | 0.215 ms | 10 | 0.315 ms | 111460.000238 s | 111460.000553 s |
(s)SCHED:7 | 0005 | 0.190 ms | 29 | 0.338 ms | 111457.032538 s | 111457.032876 s |
(s)SCHED:7 | 0003 | 0.097 ms | 10 | 0.319 ms | 111452.434351 s | 111452.434670 s |
(s)SCHED:7 | 0006 | 0.089 ms | 1 | 0.089 ms | 111450.737450 s | 111450.737539 s |
(s)SCHED:7 | 0007 | 0.085 ms | 17 | 0.169 ms | 111452.471333 s | 111452.471502 s |
(s)SCHED:7 | 0004 | 0.071 ms | 15 | 0.221 ms | 111452.535252 s | 111452.535473 s |
(s)SCHED:7 | 0000 | 0.044 ms | 32 | 0.130 ms | 111460.001982 s | 111460.002112 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/20220709015033.38326-17-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements irq trace bpf function.
Test cases:
Trace irq without filter:
# perf kwork -k irq 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 |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 31.026 ms | 285 | 1.493 ms | 110326.049963 s | 110326.051456 s |
eth0:10 | 0002 | 7.875 ms | 96 | 1.429 ms | 110313.916835 s | 110313.918264 s |
ata_piix:14 | 0002 | 2.510 ms | 28 | 0.396 ms | 110331.367987 s | 110331.368383 s |
--------------------------------------------------------------------------------------------------------------------------------
Trace irq with cpu filter:
# perf kwork -k irq rep -b -C 0
Starting trace, Hit <Ctrl+C> to stop and report
^C
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 34.288 ms | 282 | 2.061 ms | 110358.078968 s | 110358.081029 s |
--------------------------------------------------------------------------------------------------------------------------------
Trace irq with name filter:
# perf kwork -k irq rep -b -n eth0
Starting trace, Hit <Ctrl+C> to stop and report
^C
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
eth0:10 | 0002 | 2.184 ms | 21 | 0.572 ms | 110386.541699 s | 110386.542271 s |
--------------------------------------------------------------------------------------------------------------------------------
Trace irq with summary:
# perf kwork -k irq rep -b -S
Starting trace, Hit <Ctrl+C> to stop and report
^C
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 42.923 ms | 285 | 1.181 ms | 110418.128867 s | 110418.130049 s |
eth0:10 | 0002 | 2.085 ms | 20 | 0.668 ms | 110416.002935 s | 110416.003603 s |
ata_piix:14 | 0002 | 0.970 ms | 4 | 0.656 ms | 110424.034482 s | 110424.035138 s |
--------------------------------------------------------------------------------------------------------------------------------
Total count : 309
Total runtime (msec) : 45.977 (0.003% load average)
Total time span (msec) : 17017.655
--------------------------------------------------------------------------------------------------------------------------------
Committer testing:
# perf kwork -k irq 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 |
--------------------------------------------------------------------------------------------------------------------------------
nvme0q20:145 | 0019 | 0.570 ms | 28 | 0.064 ms | 26966.635102 s | 26966.635167 s |
amdgpu:162 | 0002 | 0.568 ms | 29 | 0.068 ms | 26966.644346 s | 26966.644414 s |
nvme0q4:129 | 0003 | 0.565 ms | 31 | 0.037 ms | 26966.614830 s | 26966.614866 s |
nvme0q16:141 | 0015 | 0.205 ms | 66 | 0.012 ms | 26967.145161 s | 26967.145174 s |
nvme0q29:154 | 0028 | 0.154 ms | 44 | 0.014 ms | 26967.078970 s | 26967.078984 s |
nvme0q10:135 | 0009 | 0.134 ms | 43 | 0.011 ms | 26967.132093 s | 26967.132104 s |
nvme0q2:127 | 0001 | 0.132 ms | 26 | 0.011 ms | 26966.883584 s | 26966.883595 s |
nvme0q25:150 | 0024 | 0.127 ms | 32 | 0.014 ms | 26966.631419 s | 26966.631433 s |
nvme0q14:139 | 0013 | 0.110 ms | 21 | 0.017 ms | 26966.760843 s | 26966.760861 s |
nvme0q30:155 | 0029 | 0.102 ms | 30 | 0.022 ms | 26966.677171 s | 26966.677193 s |
nvme0q13:138 | 0012 | 0.088 ms | 20 | 0.015 ms | 26966.738733 s | 26966.738748 s |
nvme0q6:131 | 0005 | 0.087 ms | 13 | 0.020 ms | 26966.648445 s | 26966.648465 s |
nvme0q28:153 | 0027 | 0.066 ms | 12 | 0.015 ms | 26966.771431 s | 26966.771447 s |
nvme0q26:151 | 0025 | 0.060 ms | 13 | 0.012 ms | 26966.704266 s | 26966.704278 s |
nvme0q21:146 | 0020 | 0.054 ms | 20 | 0.011 ms | 26967.322082 s | 26967.322094 s |
nvme0q1:126 | 0000 | 0.046 ms | 11 | 0.013 ms | 26966.859754 s | 26966.859767 s |
nvme0q17:142 | 0016 | 0.046 ms | 10 | 0.011 ms | 26967.114513 s | 26967.114524 s |
xhci_hcd:74 | 0015 | 0.041 ms | 3 | 0.016 ms | 26967.086004 s | 26967.086020 s |
nvme0q8:133 | 0007 | 0.039 ms | 12 | 0.008 ms | 26966.712056 s | 26966.712063 s |
nvme0q32:157 | 0031 | 0.036 ms | 10 | 0.014 ms | 26966.627054 s | 26966.627068 s |
nvme0q9:134 | 0008 | 0.036 ms | 11 | 0.011 ms | 26967.258452 s | 26967.258462 s |
nvme0q7:132 | 0006 | 0.024 ms | 3 | 0.014 ms | 26966.767404 s | 26966.767418 s |
nvme0q11:136 | 0010 | 0.023 ms | 5 | 0.006 ms | 26966.935455 s | 26966.935461 s |
nvme0q31:156 | 0030 | 0.018 ms | 5 | 0.006 ms | 26966.627517 s | 26966.627524 s |
nvme0q12:137 | 0011 | 0.015 ms | 2 | 0.014 ms | 26966.799588 s | 26966.799602 s |
enp5s0-rx-0:164 | 0006 | 0.009 ms | 2 | 0.005 ms | 26966.742024 s | 26966.742028 s |
enp5s0-rx-1:165 | 0007 | 0.006 ms | 2 | 0.004 ms | 26966.939486 s | 26966.939490 s |
enp5s0-tx-0:166 | 0008 | 0.005 ms | 1 | 0.005 ms | 26966.939484 s | 26966.939489 s |
enp5s0-tx-1:167 | 0009 | 0.005 ms | 1 | 0.005 ms | 26966.939484 s | 26966.939489 s |
--------------------------------------------------------------------------------------------------------------------------------
#t
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/20220709015033.38326-16-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
'perf record' generates perf.data, which generates extra interrupts
for hard disk, amount of data to be collected increases with time.
Using eBPF trace can process the data in kernel, which solves the
preceding two problems.
Add -b/--use-bpf option for latency and report to support
tracing kwork events using eBPF:
1. Create bpf prog and attach to tracepoints,
2. Start tracing after command is entered,
3. After user hit "ctrl+c", stop tracing and report,
4. Support CPU and name filtering.
This commit implements the framework code and
does not add specific event support.
Test cases:
# perf kwork rep -h
Usage: perf kwork report [<options>]
-b, --use-bpf Use BPF to measure kwork runtime
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): runtime, max, count
-S, --with-summary Show summary with statistics
--time <str> Time span for analysis (start,stop)
# perf kwork lat -h
Usage: perf kwork latency [<options>]
-b, --use-bpf Use BPF to measure kwork latency
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): avg, max, count
--time <str> Time span for analysis (start,stop)
# perf kwork lat -b
Unsupported bpf trace class irq
# perf kwork rep -b
Unsupported bpf trace class irq
Signed-off-by: Yang Jihong <yangjihong1@huawei.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/20220709015033.38326-15-yangjihong1@huawei.com
[ Simplify work_findnew() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo