github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-08-02 05:12:01 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph
Linux kernel source tree
1,215,152 Commits 1 Branch 940 Tags 24 GiB
C 96.9%
Assembly 0.9%
Rust 0.6%
Shell 0.6%
Python 0.5%
Other 0.3%
aa172a5ad3
Go to file
Yang Jihong aa172a5ad3 perf kwork top: Add -C/--cpu -i/--input -n/--name -s/--sort --time options 
Provide the following options for perf kwork top:

1. -C, --cpu <cpu>		list of cpus to profile
2. -i, --input <file>		input file name
3. -n, --name <name>		event name to profile
4. -s, --sort <key[,key2...]>	sort by key(s): rate, runtime, tid
5. --time <str>		Time span for analysis (start,stop)

Example usage:

  # perf kwork top -h

   Usage: perf kwork top [<options>]

      -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): rate, runtime, tid
          --time <str>      Time span for analysis (start,stop)

  # perf kwork top -C 2,4,5

  Total  :  51226.940 ms, 3 cpus
  %Cpu(s):  92.59% id,   0.00% hi,   0.09% si
  %Cpu2   [|                                4.61%]
  %Cpu4   [                                 0.01%]
  %Cpu5   [|||||                           17.31%]

        PID    %CPU           RUNTIME  COMMMAND
    ----------------------------------------------------
          0   99.98      17073.515 ms  swapper/4
          0   95.17      16250.874 ms  swapper/2
          0   82.62      14108.577 ms  swapper/5
       4342   21.70       3708.358 ms  perf
         16    0.13         22.296 ms  rcu_preempt
         75    0.02          4.261 ms  kworker/2:1
         98    0.01          2.540 ms  jbd2/sda-8
         61    0.01          3.404 ms  kcompactd0
         87    0.00          0.145 ms  kworker/5:1H
         73    0.00          0.596 ms  kworker/5:1
         41    0.00          0.041 ms  ksoftirqd/5
         40    0.00          0.718 ms  migration/5
         64    0.00          0.115 ms  kworker/4:1
         35    0.00          0.556 ms  migration/4
        353    0.00          1.143 ms  sshd
         26    0.00          1.665 ms  ksoftirqd/2
         25    0.00          0.662 ms  migration/2

  # perf kwork top -i perf.data

  Total  : 136601.588 ms, 8 cpus
  %Cpu(s):  95.66% id,   0.04% hi,   0.05% si
  %Cpu0   [                                 0.02%]
  %Cpu1   [                                 0.01%]
  %Cpu2   [|                                4.61%]
  %Cpu3   [                                 0.04%]
  %Cpu4   [                                 0.01%]
  %Cpu5   [|||||                           17.31%]
  %Cpu6   [                                 0.51%]
  %Cpu7   [|||                             11.42%]

        PID    %CPU           RUNTIME  COMMMAND
    ----------------------------------------------------
          0   99.98      17073.515 ms  swapper/4
          0   99.98      17072.173 ms  swapper/1
          0   99.93      17064.229 ms  swapper/3
          0   99.62      17011.013 ms  swapper/0
          0   99.47      16985.180 ms  swapper/6
          0   95.17      16250.874 ms  swapper/2
          0   88.51      15111.684 ms  swapper/7
          0   82.62      14108.577 ms  swapper/5
       4342   33.00       5644.045 ms  perf
       4344    0.43         74.351 ms  perf
         16    0.13         22.296 ms  rcu_preempt
       4345    0.05         10.093 ms  perf
       4343    0.05          8.769 ms  perf
       4341    0.02          4.882 ms  perf
       4095    0.02          4.605 ms  kworker/7:1
         75    0.02          4.261 ms  kworker/2:1
        120    0.01          1.909 ms  systemd-journal
         98    0.01          2.540 ms  jbd2/sda-8
         61    0.01          3.404 ms  kcompactd0
        667    0.01          2.542 ms  kworker/u16:2
       4340    0.00          1.052 ms  kworker/7:2
         97    0.00          0.489 ms  kworker/7:1H
         51    0.00          0.209 ms  ksoftirqd/7
         50    0.00          0.646 ms  migration/7
         76    0.00          0.753 ms  kworker/6:1
         45    0.00          0.572 ms  migration/6
         87    0.00          0.145 ms  kworker/5:1H
         73    0.00          0.596 ms  kworker/5:1
         41    0.00          0.041 ms  ksoftirqd/5
         40    0.00          0.718 ms  migration/5
         64    0.00          0.115 ms  kworker/4:1
         35    0.00          0.556 ms  migration/4
        353    0.00          2.600 ms  sshd
         74    0.00          0.205 ms  kworker/3:1
         33    0.00          1.576 ms  kworker/3:0H
         30    0.00          0.996 ms  migration/3
         26    0.00          1.665 ms  ksoftirqd/2
         25    0.00          0.662 ms  migration/2
        397    0.00          0.057 ms  kworker/1:1
         20    0.00          1.005 ms  migration/1
       2909    0.00          1.053 ms  kworker/0:2
         17    0.00          0.720 ms  migration/0
         15    0.00          0.039 ms  ksoftirqd/0

  # perf kwork top -n perf

  Total  : 136601.588 ms, 8 cpus
  %Cpu(s):  95.66% id,   0.04% hi,   0.05% si
  %Cpu0   [                                 0.01%]
  %Cpu1   [                                 0.00%]
  %Cpu2   [|                                4.44%]
  %Cpu3   [                                 0.00%]
  %Cpu4   [                                 0.00%]
  %Cpu5   [                                 0.00%]
  %Cpu6   [                                 0.49%]
  %Cpu7   [|||                             11.38%]

        PID    %CPU           RUNTIME  COMMMAND
    ----------------------------------------------------
       4342   15.74       2695.516 ms  perf
       4344    0.43         74.351 ms  perf
       4345    0.05         10.093 ms  perf
       4343    0.05          8.769 ms  perf
       4341    0.02          4.882 ms  perf

  # perf kwork top -s tid

  Total  : 136601.588 ms, 8 cpus
  %Cpu(s):  95.66% id,   0.04% hi,   0.05% si
  %Cpu0   [                                 0.02%]
  %Cpu1   [                                 0.01%]
  %Cpu2   [|                                4.61%]
  %Cpu3   [                                 0.04%]
  %Cpu4   [                                 0.01%]
  %Cpu5   [|||||                           17.31%]
  %Cpu6   [                                 0.51%]
  %Cpu7   [|||                             11.42%]

        PID    %CPU           RUNTIME  COMMMAND
    ----------------------------------------------------
          0   99.62      17011.013 ms  swapper/0
          0   99.98      17072.173 ms  swapper/1
          0   95.17      16250.874 ms  swapper/2
          0   99.93      17064.229 ms  swapper/3
          0   99.98      17073.515 ms  swapper/4
          0   82.62      14108.577 ms  swapper/5
          0   99.47      16985.180 ms  swapper/6
          0   88.51      15111.684 ms  swapper/7
         15    0.00          0.039 ms  ksoftirqd/0
         16    0.13         22.296 ms  rcu_preempt
         17    0.00          0.720 ms  migration/0
         20    0.00          1.005 ms  migration/1
         25    0.00          0.662 ms  migration/2
         26    0.00          1.665 ms  ksoftirqd/2
         30    0.00          0.996 ms  migration/3
         33    0.00          1.576 ms  kworker/3:0H
         35    0.00          0.556 ms  migration/4
         40    0.00          0.718 ms  migration/5
         41    0.00          0.041 ms  ksoftirqd/5
         45    0.00          0.572 ms  migration/6
         50    0.00          0.646 ms  migration/7
         51    0.00          0.209 ms  ksoftirqd/7
         61    0.01          3.404 ms  kcompactd0
         64    0.00          0.115 ms  kworker/4:1
         73    0.00          0.596 ms  kworker/5:1
         74    0.00          0.205 ms  kworker/3:1
         75    0.02          4.261 ms  kworker/2:1
         76    0.00          0.753 ms  kworker/6:1
         87    0.00          0.145 ms  kworker/5:1H
         97    0.00          0.489 ms  kworker/7:1H
         98    0.01          2.540 ms  jbd2/sda-8
        120    0.01          1.909 ms  systemd-journal
        353    0.00          2.600 ms  sshd
        397    0.00          0.057 ms  kworker/1:1
        667    0.01          2.542 ms  kworker/u16:2
       2909    0.00          1.053 ms  kworker/0:2
       4095    0.02          4.605 ms  kworker/7:1
       4340    0.00          1.052 ms  kworker/7:2
       4341    0.02          4.882 ms  perf
       4342   33.00       5644.045 ms  perf
       4343    0.05          8.769 ms  perf
       4344    0.43         74.351 ms  perf
       4345    0.05         10.093 ms  perf

  # perf kwork top --time 128800,

  Total  :  53495.122 ms, 8 cpus
  %Cpu(s):  94.71% id,   0.09% hi,   0.09% si
  %Cpu0   [                                 0.07%]
  %Cpu1   [                                 0.04%]
  %Cpu2   [||                               8.49%]
  %Cpu3   [                                 0.09%]
  %Cpu4   [                                 0.02%]
  %Cpu5   [                                 0.06%]
  %Cpu6   [                                 0.12%]
  %Cpu7   [||||||                          21.24%]

        PID    %CPU           RUNTIME  COMMMAND
    ----------------------------------------------------
          0   99.96       3981.363 ms  swapper/4
          0   99.94       3978.955 ms  swapper/1
          0   99.91       9329.375 ms  swapper/5
          0   99.87       4906.829 ms  swapper/3
          0   99.86       9028.064 ms  swapper/6
          0   98.67       3928.161 ms  swapper/0
          0   91.17       8388.432 ms  swapper/2
          0   78.65       7125.602 ms  swapper/7
       4342   29.42       2675.198 ms  perf
         16    0.18         16.817 ms  rcu_preempt
       4345    0.09          8.183 ms  perf
       4344    0.04          4.290 ms  perf
       4343    0.03          2.844 ms  perf
        353    0.03          2.600 ms  sshd
       4095    0.02          2.702 ms  kworker/7:1
        120    0.02          1.909 ms  systemd-journal
         98    0.02          2.540 ms  jbd2/sda-8
         61    0.02          1.886 ms  kcompactd0
        667    0.02          1.011 ms  kworker/u16:2
         75    0.02          2.693 ms  kworker/2:1
       4341    0.01          1.838 ms  perf
         30    0.01          0.788 ms  migration/3
         26    0.01          1.665 ms  ksoftirqd/2
         20    0.01          0.752 ms  migration/1
       2909    0.01          0.604 ms  kworker/0:2
       4340    0.00          0.635 ms  kworker/7:2
         97    0.00          0.214 ms  kworker/7:1H
         51    0.00          0.209 ms  ksoftirqd/7
         50    0.00          0.646 ms  migration/7
         76    0.00          0.602 ms  kworker/6:1
         45    0.00          0.366 ms  migration/6
         87    0.00          0.145 ms  kworker/5:1H
         40    0.00          0.446 ms  migration/5
         35    0.00          0.318 ms  migration/4
         74    0.00          0.205 ms  kworker/3:1
         33    0.00          0.080 ms  kworker/3:0H
         25    0.00          0.448 ms  migration/2
        397    0.00          0.057 ms  kworker/1:1
         17    0.00          0.365 ms  migration/0

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-14-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-09-12 17:31:59 -03:00
arch Fix preemption delays in the SGX code, remove unnecessarily UAPI-exported code, 2023-09-10 10:39:31 -07:00
block block: fix pin count management when merging same-page segments 2023-09-06 07:32:27 -06:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto This update includes the following changes: 2023-08-29 11:23:29 -07:00
Documentation drm ci for 6.6-rc1 2023-09-10 11:55:26 -07:00
drivers drm ci for 6.6-rc1 2023-09-10 11:55:26 -07:00
fs six smb3 client fixes, one fix for nls Kconfig, one minor spnego registry update 2023-09-09 19:56:23 -07:00
include six smb3 client fixes, one fix for nls Kconfig, one minor spnego registry update 2023-09-09 19:56:23 -07:00
init workqueue: Changes for v6.6 2023-09-01 16:06:32 -07:00
io_uring Revert "io_uring: fix IO hang in io_wq_put_and_exit from do_exit()" 2023-09-07 09:41:49 -06:00
ipc Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
kernel RISC-V Patches for the 6.6 Merge Window, Part 2 (try 2) 2023-09-09 14:25:11 -07:00
lib iov_iter: Kunit tests for page extraction 2023-09-09 15:11:49 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm LoongArch changes for v6.6 2023-09-08 12:16:52 -07:00
net Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
rust Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
samples VFIO updates for v6.6-rc1 2023-08-30 20:36:01 -07:00
scripts Fix preemption delays in the SGX code, remove unnecessarily UAPI-exported code, 2023-09-10 10:39:31 -07:00
security Landlock updates for v6.6-rc1 2023-09-08 12:06:51 -07:00
sound sound fixes for 6.6-rc1 2023-09-08 13:07:50 -07:00
tools perf kwork top: Add -C/--cpu -i/--input -n/--name -s/--sort --time options 2023-09-12 17:31:59 -03:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt ARM: 2023-09-07 13:52:20 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap for-linus-2023083101 2023-09-01 12:31:44 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS drm ci for 6.6-rc1 2023-09-10 11:55:26 -07:00
Makefile Linux 6.6-rc1 2023-09-10 16:28:41 -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.