From 24247f76ebb58de83bd494f33b8a325457a1c047 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Tue, 17 Jun 2025 20:48:59 +0800 Subject: [PATCH] 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 Signed-off-by: Len Brown Signed-off-by: Sasha Levin --- tools/power/x86/turbostat/turbostat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 33a54a9e07818..d56d457d6d93a 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); -- 2.47.3