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| author | Zhang Rui <rui.zhang@intel.com> | 2025-06-17 20:48:59 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-15 16:39:29 +0200 |
| commit | 24247f76ebb58de83bd494f33b8a325457a1c047 (patch) | |
| tree | e481ed94d57bc277ee7593e6b724b9ffbd51b3be | |
| parent | f0a06b02a163f15be7c65396f091c49fa2d449b7 (diff) | |
tools/power turbostat: Fix bogus SysWatt for forked program
[ Upstream commit 44207567fa64e995d4f2ec2d45af4c947cb1a465 ]
Similar to delta_cpu(), delta_platform() is called in turbostat main
loop. This ensures accurate SysWatt readings in periodic monitoring mode
$ sudo turbostat -S -q --show power -i 1
CoreTmp PkgTmp PkgWatt CorWatt GFXWatt RAMWatt PKG_% RAM_% SysWatt
60 61 6.21 1.13 0.16 0.00 0.00 0.00 13.07
58 61 6.00 1.07 0.18 0.00 0.00 0.00 12.75
58 61 5.74 1.05 0.17 0.00 0.00 0.00 12.22
58 60 6.27 1.11 0.24 0.00 0.00 0.00 13.55
However, delta_platform() is missing for forked program and causes bogus
SysWatt reporting,
$ sudo turbostat -S -q --show power sleep 1
1.004736 sec
CoreTmp PkgTmp PkgWatt CorWatt GFXWatt RAMWatt PKG_% RAM_% SysWatt
57 58 6.05 1.02 0.16 0.00 0.00 0.00 0.03
Add missing delta_platform() for forked program.
Fixes: e5f687b89bc2 ("tools/power turbostat: Add RAPL psys as a built-in counter")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 33a54a9e0781..d56d457d6d93 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -9816,6 +9816,7 @@ int fork_it(char **argv) timersub(&tv_odd, &tv_even, &tv_delta); if (for_all_cpus_2(delta_cpu, ODD_COUNTERS, EVEN_COUNTERS)) fprintf(outf, "%s: Counter reset detected\n", progname); + delta_platform(&platform_counters_odd, &platform_counters_even); compute_average(EVEN_COUNTERS); format_all_counters(EVEN_COUNTERS); |