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Yang Jihong 4c14819169 perf kwork: Add softirq report support Implements softirq kwork report function. Test cases: # perf kwork -k softirq rep Kwork Name \| Cpu \| Total Runtime \| Count \| Max runtime \| Max runtime start \| Max runtime end \| -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 \| 0003 \| 181.387 ms \| 2476 \| 1.240 ms \| 44004.787960 s \| 44004.789201 s \| (s)RCU:9 \| 0003 \| 91.573 ms \| 2193 \| 0.650 ms \| 44004.790258 s \| 44004.790908 s \| (s)RCU:9 \| 0001 \| 78.960 ms \| 1619 \| 1.195 ms \| 44001.496553 s \| 44001.497749 s \| (s)SCHED:7 \| 0003 \| 55.962 ms \| 1255 \| 0.954 ms \| 44004.812008 s \| 44004.812962 s \| ... <SNIP> ... (s)RCU:9 \| 0004 \| 0.830 ms \| 26 \| 0.058 ms \| 43997.666418 s \| 43997.666476 s \| (s)TIMER:1 \| 0001 \| 0.471 ms \| 4 \| 0.158 ms \| 44007.834694 s \| 44007.834852 s \| (s)RCU:9 \| 0006 \| 0.220 ms \| 7 \| 0.048 ms \| 44004.833764 s \| 44004.833812 s \| (s)NET_RX:3 \| 0002 \| 0.164 ms \| 5 \| 0.049 ms \| 44005.012418 s \| 44005.012466 s \| (s)TIMER:1 \| 0005 \| 0.164 ms \| 1 \| 0.164 ms \| 44007.820474 s \| 44007.820638 s \| (s)TIMER:1 \| 0006 \| 0.087 ms \| 1 \| 0.087 ms \| 44000.830807 s \| 44000.830894 s \| (s)SCHED:7 \| 0006 \| 0.080 ms \| 2 \| 0.044 ms \| 43997.826145 s \| 43997.826189 s \| -------------------------------------------------------------------------------------------------------------------------------- # # perf kwork -k softirq rep -S Kwork Name \| Cpu \| Total Runtime \| Count \| Max runtime \| Max runtime start \| Max runtime end \| -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 \| 0003 \| 181.387 ms \| 2476 \| 1.240 ms \| 44004.787960 s \| 44004.789201 s \| (s)RCU:9 \| 0003 \| 91.573 ms \| 2193 \| 0.650 ms \| 44004.790258 s \| 44004.790908 s \| (s)RCU:9 \| 0001 \| 78.960 ms \| 1619 \| 1.195 ms \| 44001.496553 s \| 44001.497749 s \| (s)SCHED:7 \| 0000 \| 63.631 ms \| 680 \| 2.690 ms \| 44006.721976 s \| 44006.724666 s \| ... <SNIP> ... (s)SCHED:7 \| 0003 \| 55.962 ms \| 1255 \| 0.954 ms \| 44004.812008 s \| 44004.812962 s \| (s)RCU:9 \| 0006 \| 0.220 ms \| 7 \| 0.048 ms \| 44004.833764 s \| 44004.833812 s \| (s)NET_RX:3 \| 0002 \| 0.164 ms \| 5 \| 0.049 ms \| 44005.012418 s \| 44005.012466 s \| (s)TIMER:1 \| 0005 \| 0.164 ms \| 1 \| 0.164 ms \| 44007.820474 s \| 44007.820638 s \| (s)TIMER:1 \| 0006 \| 0.087 ms \| 1 \| 0.087 ms \| 44000.830807 s \| 44000.830894 s \| (s)SCHED:7 \| 0006 \| 0.080 ms \| 2 \| 0.044 ms \| 43997.826145 s \| 43997.826189 s \| -------------------------------------------------------------------------------------------------------------------------------- Total count : 12748 Total runtime (msec) : 661.433 (0.065% load average) Total time span (msec) : 10176.441 -------------------------------------------------------------------------------------------------------------------------------- # # perf kwork -k softirq rep -s count,max Kwork Name \| Cpu \| Total Runtime \| Count \| Max runtime \| Max runtime start \| Max runtime end \| -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 \| 0003 \| 181.387 ms \| 2476 \| 1.240 ms \| 44004.787960 s \| 44004.789201 s \| (s)RCU:9 \| 0003 \| 91.573 ms \| 2193 \| 0.650 ms \| 44004.790258 s \| 44004.790908 s \| (s)SCHED:7 \| 0002 \| 50.039 ms \| 1731 \| 0.074 ms \| 44005.009447 s \| 44005.009521 s \| (s)RCU:9 \| 0001 \| 78.960 ms \| 1619 \| 1.195 ms \| 44001.496553 s \| 44001.497749 s \| (s)SCHED:7 \| 0003 \| 55.962 ms \| 1255 \| 0.954 ms \| 44004.812008 s \| 44004.812962 s \| ... <SNIP> ... (s)RCU:9 \| 0002 \| 35.241 ms \| 932 \| 0.407 ms \| 44005.009541 s \| 44005.009949 s \| (s)RCU:9 \| 0000 \| 45.710 ms \| 702 \| 1.144 ms \| 44004.787023 s \| 44004.788167 s \| (s)SCHED:7 \| 0006 \| 0.080 ms \| 2 \| 0.044 ms \| 43997.826145 s \| 43997.826189 s \| (s)TIMER:1 \| 0005 \| 0.164 ms \| 1 \| 0.164 ms \| 44007.820474 s \| 44007.820638 s \| (s)TIMER:1 \| 0006 \| 0.087 ms \| 1 \| 0.087 ms \| 44000.830807 s \| 44000.830894 s \| -------------------------------------------------------------------------------------------------------------------------------- Committer testing: # perf kwork -k softirq report -C 2 -s count,max Kwork Name \| Cpu \| Total Runtime \| Count \| Max runtime \| Max runtime start \| Max runtime end \| -------------------------------------------------------------------------------------------------------------------------------- (s)SCHED:7 \| 0002 \| 0.980 ms \| 159 \| 0.024 ms \| 26035.571037 s \| 26035.571061 s \| (s)RCU:9 \| 0002 \| 0.124 ms \| 88 \| 0.021 ms \| 26035.177050 s \| 26035.177071 s \| (s)TIMER:1 \| 0002 \| 0.122 ms \| 56 \| 0.007 ms \| 26035.468045 s \| 26035.468052 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/20220709015033.38326-9-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		History 2022-07-26 16:31:54 -03:00
arch	- Improve the check whether the kernel supports WP mappings so that it	2022-07-17 08:27:30 -07:00
block	block: fix missing blkcg_bio_issue_init	2022-07-14 10:54:49 -06:00
certs	Certs changes	2022-06-21 12:13:53 -05:00
crypto	crypto: s390 - do not depend on CRYPTO_HW for SIMD implementations	2022-07-06 20:04:06 -07:00
Documentation	RISC-V:	2022-07-15 10:31:46 -07:00
drivers	Second v5.19 rc pull request	2022-07-18 17:16:22 -07:00
fs	for-5.19-rc7-tag	2022-07-16 13:48:55 -07:00
include	Input updates for v5.19-rc6	2022-07-17 07:52:46 -07:00
init	gcc-12: disable '-Warray-bounds' universally for now	2022-06-09 10:11:12 -07:00
ipc	ipc: Free mq_sysctls if ipc namespace creation failed	2022-06-22 17:47:41 -05:00
kernel	watchqueue: make sure to serialize 'wqueue->defunct' properly	2022-07-20 10:46:07 -07:00
lib	ubsan: disable UBSAN_DIV_ZERO for clang	2022-07-14 15:45:26 -07:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	mm: split huge PUD on wp_huge_pud fallback	2022-07-03 15:42:33 -07:00
net	net/tls: Check for errors in tls_device_init	2022-07-14 10:12:39 -07:00
samples	Fixes and minor clean ups for tracing:	2022-07-12 16:17:40 -07:00
scripts	Just when you thought that all the speculation bugs were addressed and	2022-07-11 18:15:25 -07:00
security	lockdown: Fix kexec lockdown bypass with ima policy	2022-07-20 09:56:48 -07:00
sound	ALSA: hda/realtek - Enable the headset-mic on a Xiaomi's laptop	2022-07-13 12:42:41 +02:00
tools	perf kwork: Add softirq report support	2022-07-26 16:31:54 -03:00
usr	Not a lot of material this cycle. Many singleton patches against various	2022-05-27 11:22:03 -07:00
virt	KVM: x86: disable preemption around the call to kvm_arch_vcpu_{un\|}blocking	2022-06-09 10:52:20 -04:00
.clang-format	clang-format: Fix space after for_each macros	2022-05-20 19:27:16 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	kbuild: split the second line of .mod into .usyms	2022-05-08 03:16:59 +09:00
.mailmap	cxl fixes for 5.19-rc6	2022-07-08 12:55:25 -07:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan	2022-07-07 15:17:00 +02:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	spi: Fixes for v5.19	2022-07-15 10:23:43 -07:00
Makefile	Linux 5.19-rc7	2022-07-17 13:30:22 -07:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.