Yang Jihong bcc8b3e88d perf kwork: Implement perf kwork timehist ... Implements framework of perf kwork timehist, to provide an analysis of kernel work events. Test cases: # perf kwork tim Runtime start Runtime end Cpu Kwork name Runtime Delaytime (TYPE)NAME:NUM (msec) (msec) ----------------- ----------------- ------ ------------------------------ ---------- ---------- 91576.060290 91576.060344 [0000] (s)RCU:9 0.055 0.111 91576.061470 91576.061547 [0000] (s)SCHED:7 0.077 0.073 91576.062604 91576.062697 [0001] (s)RCU:9 0.094 0.409 91576.064443 91576.064517 [0002] (s)RCU:9 0.074 0.114 91576.065144 91576.065211 [0000] (s)SCHED:7 0.067 0.058 91576.066564 91576.066609 [0003] (s)RCU:9 0.045 0.110 91576.068495 91576.068559 [0000] (s)SCHED:7 0.064 0.059 91576.068900 91576.068996 [0004] (s)RCU:9 0.096 0.726 91576.069364 91576.069420 [0002] (s)RCU:9 0.056 0.082 91576.069649 91576.069701 [0004] (s)RCU:9 0.052 0.111 91576.070147 91576.070206 [0000] (s)SCHED:7 0.060 0.057 91576.073147 91576.073202 [0000] (s)SCHED:7 0.054 0.060 <SNIP> # perf kwork tim --max-stack 2 -g Runtime start Runtime end Cpu Kwork name Runtime Delaytime (TYPE)NAME:NUM (msec) (msec) ----------------- ----------------- ------ ------------------------------ ---------- ---------- 91576.060290 91576.060344 [0000] (s)RCU:9 0.055 0.111 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.061470 91576.061547 [0000] (s)SCHED:7 0.077 0.073 irq_exit_rcu <- sysvec_call_function_single 91576.062604 91576.062697 [0001] (s)RCU:9 0.094 0.409 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.064443 91576.064517 [0002] (s)RCU:9 0.074 0.114 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.065144 91576.065211 [0000] (s)SCHED:7 0.067 0.058 irq_exit_rcu <- sysvec_call_function_single 91576.066564 91576.066609 [0003] (s)RCU:9 0.045 0.110 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.068495 91576.068559 [0000] (s)SCHED:7 0.064 0.059 irq_exit_rcu <- sysvec_call_function_single 91576.068900 91576.068996 [0004] (s)RCU:9 0.096 0.726 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.069364 91576.069420 [0002] (s)RCU:9 0.056 0.082 irq_exit_rcu <- sysvec_apic_timer_interrupt 91576.069649 91576.069701 [0004] (s)RCU:9 0.052 0.111 irq_exit_rcu <- sysvec_apic_timer_interrupt <SNIP> Committer testing: # perf kwork -k workqueue timehist | head -40 Runtime start Runtime end Cpu Kwork name Runtime Delaytime (TYPE)NAME:NUM (msec) (msec) ----------------- ----------------- ------ ------------------------------ ---------- ---------- 26520.211825 26520.211832 [0019] (w)free_work 0.007 0.004 26520.212929 26520.212934 [0020] (w)free_work 0.005 0.004 26520.213226 26520.213228 [0014] (w)kfree_rcu_work 0.002 0.004 26520.214057 26520.214061 [0021] (w)free_work 0.004 0.004 26520.221239 26520.221241 [0007] (w)kfree_rcu_work 0.002 0.009 26520.223232 26520.223238 [0013] (w)psi_avgs_work 0.005 0.006 26520.230057 26520.230060 [0020] (w)free_work 0.003 0.003 26520.270428 26520.270434 [0015] (w)free_work 0.006 0.004 26520.270546 26520.270550 [0014] (w)free_work 0.004 0.003 26520.281626 26520.281629 [0015] (w)free_work 0.003 0.002 26520.287225 26520.287230 [0012] (w)psi_avgs_work 0.005 0.008 26520.287231 26520.287235 [0001] (w)psi_avgs_work 0.004 0.011 26520.287236 26520.287239 [0001] (w)psi_avgs_work 0.003 0.012 26520.329488 26520.329492 [0024] (w)free_work 0.004 0.004 26520.330600 26520.330605 [0007] (w)free_work 0.005 0.004 26520.334218 26520.334218 [0007] (w)kfree_rcu_monitor 0.001 0.002 26520.335220 26520.335221 [0005] (w)kfree_rcu_monitor 0.001 0.004 26520.343980 26520.343985 [0007] (w)free_work 0.005 0.002 26520.345093 26520.345097 [0006] (w)free_work 0.004 0.003 26520.351233 26520.351238 [0027] (w)psi_avgs_work 0.005 0.008 26520.353228 26520.353229 [0007] (w)kfree_rcu_work 0.001 0.002 26520.353229 26520.353231 [0005] (w)kfree_rcu_work 0.001 0.006 26520.382381 26520.382383 [0006] (w)free_work 0.003 0.002 26520.386547 26520.386548 [0006] (w)free_work 0.002 0.001 26520.391243 26520.391245 [0015] (w)console_callback 0.002 0.016 26520.415369 26520.415621 [0027] (w)btrfs_work_helper 0.252 26520.415351 26520.416174 [0002] (w)btrfs_work_helper 0.823 0.037 26520.415343 26520.416304 [0031] (w)btrfs_work_helper 0.961 26520.415335 26520.417078 [0001] (w)btrfs_work_helper 1.743 26520.415250 26520.417564 [0002] (w)wb_workfn 2.314 26520.424777 26520.424787 [0002] (w)btrfs_work_helper 0.010 26520.424788 26520.424798 [0002] (w)btrfs_work_helper 0.010 26520.424790 26520.424805 [0001] (w)btrfs_work_helper 0.016 0.016 26520.424801 26520.424807 [0002] (w)btrfs_work_helper 0.006 26520.424809 26520.424831 [0002] (w)btrfs_work_helper 0.022 0.030 26520.424824 26520.424835 [0027] (w)btrfs_work_helper 0.011 26520.424809 26520.424867 [0001] (w)btrfs_work_helper 0.059 0.032 # 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/20220709015033.38326-14-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: Implement perf kwork timehist	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