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* [PATCH 0/2] ftrace: improve ftrace during compiling
@ 2021-09-11 13:50 Yinan Liu
  2021-09-11 13:50 ` [PATCH 1/2] scripts: ftrace - move the sort-processing in ftrace_init to compile time Yinan Liu
                   ` (8 more replies)
  0 siblings, 9 replies; 60+ messages in thread
From: Yinan Liu @ 2021-09-11 13:50 UTC (permalink / raw)
  To: yinan, rostedt, mark-pk.tsai, peterz, mingo, linux-kernel

Hi,
Some business scenarios require the kernel to start as quickly as possible, 
so recently we are optimizing some processing during the kernel startup phase.
When the kernel is started, ftrace_init() takes 15-20ms to execute. Almost 
all of the overhead belongs to the sorting and replacement of nop instructions, 
and other processing only accounts for about 300us. Advance the processing of 
these two parts to the compile time, and the time saved is very important 
for certain scenarios, such as the quick start of containers.

Yinan Liu (2):
  scripts: ftrace - move the sort-processing in ftrace_init to compile time
  scripts: ftrace - move the nop-processing in ftrace_init to compile time

 kernel/trace/ftrace.c   |   9 +++-
 scripts/link-vmlinux.sh |   6 +--
 scripts/recordmcount.h  |  14 +++++++
 scripts/sorttable.c     |   2 +
 scripts/sorttable.h     | 109 +++++++++++++++++++++++++++++++++++++++++++++++-
 5 files changed, 133 insertions(+), 7 deletions(-)

-- 
2.14.4.44.g2045bb6
+++++++++++++++++++++++++++++++++++++++++++++++-

^ permalink raw reply	[flat|nested] 60+ messages in thread

end of thread, other threads:[~2022-01-22  9:17 UTC | newest]

Thread overview: 60+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-11 13:50 [PATCH 0/2] ftrace: improve ftrace during compiling Yinan Liu
2021-09-11 13:50 ` [PATCH 1/2] scripts: ftrace - move the sort-processing in ftrace_init to compile time Yinan Liu
2021-09-11 13:59   ` Steven Rostedt
2021-10-03 13:42     ` Yinan Liu
2021-10-08 23:48       ` Steven Rostedt
2021-10-09  2:56         ` Yinan Liu
2021-10-25 13:20           ` Yinan Liu
2021-10-25 15:00             ` Steven Rostedt
2021-09-11 13:50 ` [PATCH 2/2] scripts: ftrace - move the nop-processing " Yinan Liu
2021-09-11 14:12   ` Steven Rostedt
2021-09-11 15:28     ` Yinan Liu
2021-09-11 16:07       ` Peter Zijlstra
2021-09-11 14:33   ` Peter Zijlstra
2021-09-11 17:15   ` kernel test robot
2021-09-11 18:04   ` kernel test robot
2021-11-16  2:49 ` [PATCH v2 0/2] ftrace optimization at " Yinan Liu
2021-11-16  2:49   ` [PATCH v2 1/2] scripts: ftrace - move the sort-processing in ftrace_init to " Yinan Liu
2021-11-16  8:07     ` Peter Zijlstra
2021-11-16 12:42       ` Yinan Liu
2021-11-16 13:05         ` Peter Zijlstra
2021-11-16 14:46           ` Yinan Liu
2021-11-17 13:34     ` kernel test robot
2021-11-16  2:49   ` [PATCH v2 2/2] scripts: ftrace - move the nop-processing " Yinan Liu
2021-11-16  8:10     ` Peter Zijlstra
2021-11-16 12:51       ` Yinan Liu
2021-11-16 13:07       ` Steven Rostedt
2021-11-16 15:02         ` Yinan Liu
2021-11-16 16:06     ` Steven Rostedt
2021-11-22 13:43 ` [PATCH v3] scripts: ftrace - move the sort-processing " Yinan Liu
2021-11-23 10:54 ` [PATCH v4] ftrace sorting optimization changelog Yinan Liu
2021-11-23 10:54   ` [PATCH v4] scripts: ftrace - move the sort-processing in ftrace_init to compile time Yinan Liu
2021-11-29  2:13     ` Yinan Liu
2021-11-29  3:51       ` Steven Rostedt
2021-11-29  6:52         ` Yinan Liu
2021-11-30 17:08     ` Steven Rostedt
2021-12-01  5:32 ` [PATCH v5 0/2] ftrace sorting optimization changelog Yinan Liu
2021-12-01  5:32   ` [PATCH v5 1/2] scripts: ftrace - move the sort-processing in ftrace_init to compile time Yinan Liu
2021-12-01 21:45     ` Steven Rostedt
2021-12-05 12:35     ` [scripts] 12955fb1c5: kernel-selftests.livepatch.test-ftrace.sh.fail kernel test robot
2021-12-01  5:32   ` [PATCH v5 2/2] script/sorttable: code style improvements Yinan Liu
2021-12-02  2:16 ` [PATCH v6 0/2] ftrace sorting optimization changelog Yinan Liu
2021-12-02  2:16   ` [PATCH v6 1/2] scripts: ftrace - move the sort-processing in ftrace_init Yinan Liu
2021-12-02 17:58     ` Steven Rostedt
2021-12-05 12:45       ` Masami Hiramatsu
2021-12-06 20:18       ` Steven Rostedt
2021-12-07  1:29         ` Yinan Liu
2021-12-02  2:16   ` [PATCH v6 2/2] script/sorttable: code style improvements Yinan Liu
2021-12-02 15:30   ` [PATCH v6 0/2] ftrace sorting optimization changelog Peter Zijlstra
2021-12-07 15:13 ` [PATCH v7 0/2] ftrace sorting optimization Yinan Liu
2021-12-07 15:13   ` [PATCH v7 1/2] scripts: ftrace - move the sort-processing in ftrace_init Yinan Liu
2021-12-11 14:50     ` Steven Rostedt
2021-12-07 15:13   ` [PATCH v7 2/2] script/sorttable: code style improvements Yinan Liu
2021-12-12 11:33 ` [PATCH v8 0/1] change log Yinan Liu
2021-12-12 11:33   ` [PATCH v8] scripts: ftrace - move the sort-processing in ftrace_init Yinan Liu
2022-01-21  9:46     ` Sven Schnelle
2022-01-21 10:42       ` Heiko Carstens
2022-01-21 11:14         ` Sven Schnelle
2022-01-21 11:29           ` Sven Schnelle
2022-01-21 18:11         ` Steven Rostedt
2022-01-22  9:17           ` Heiko Carstens

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