Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-07 22:03:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

PM: tools: sleepgraph: Recognize "CPU killed" messages

Browse Source 
On the arm64 platform with PSCI, the core log of CPU offline is as
follows:

[  100.431501] CPU1: shutdown
[  100.454820] psci: CPU1 killed (polled 20 ms)
[  100.459266] CPU2: shutdown
[  100.482575] psci: CPU2 killed (polled 20 ms)
[  100.486057] CPU3: shutdown
[  100.513974] psci: CPU3 killed (polled 28 ms)
[  100.518068] CPU4: shutdown
[  100.541481] psci: CPU4 killed (polled 24 ms)

Prevent sleepgraph from mistakenly treating the "CPU up" message as part
of the suspend flow (because it should be regarded as part of the resume
flow) by making it recognize the "CPU* killed" messages above.

Signed-off-by: Xueqin Luo <luoxueqin@kylinos.cn>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Xueqin Luo 2023-03-16 09:33:07 +08:00 committed by Rafael J. Wysocki
parent 0417552730
commit 34ea427e01
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
tools/power/pm-graph/sleepgraph.py
View File

@ -4151,9 +4151,12 @@ def parseKernelLog(data):
elif(re.match('Enabling non-boot CPUs .*', msg)):
# start of first cpu resume
cpu_start = ktime
elif(re.match('smpboot: CPU (?P<cpu>[0-9]*) is now offline', msg)):
elif(re.match('smpboot: CPU (?P<cpu>[0-9]*) is now offline', msg)) \
or re.match('psci: CPU(?P<cpu>[0-9]*) killed.*', msg)):
# end of a cpu suspend, start of the next
m = re.match('smpboot: CPU (?P<cpu>[0-9]*) is now offline', msg)
if(not m):
m = re.match('psci: CPU(?P<cpu>[0-9]*) killed.*', msg)
cpu = 'CPU'+m.group('cpu')
if(cpu not in actions):
actions[cpu] = []