kernel/linux.git/tools/power/x86, branch v7.0.12

tools/power turbostat: Fix --cpu-set 1 regression on HT systems

2026-05-23T11:09:25+00:00

[ Upstream commit 08e11edd0e63b72651ed5eb9142430d1ca764923 ] When the "--cpu-set" option limits turbostat to run on a higher numbered HT sibling, it exits upon dividing by zero. This is because the HT support handles higher numbered siblings at the same time as lower numbered siblings. But when that lower number sibling is dis-allowed, the higher numbered sibling is never processed. The result is a time delta of 0, which results in a divide by 0 for any of the "per-second" metrics. Enhance the HT enumeration code to record all siblings (up to SMT4). Consult this complete HT sibling list to determine when to process an HT sibling, and when to skip it. Fixes: a2b4d0f8bf07 ("tools/power turbostat: Favor cpu# over core#") Signed-off-by: Len Brown Signed-off-by: Sasha Levin

tools/power turbostat: Fix --cpu-set 0 regression on HT systems

2026-05-23T11:09:25+00:00

[ Upstream commit 2c52f942fcf21c8e09c7dac669fca591cec2692b ] "turbostat --cpu-set 0" appears to hang if cpu0 has an HT sibling. This is because the initialization code recognizes that it does not have to open perf files for the HT sibling, but the HT support in the collection code sees the HT sibling and tries to read from an uninitialized file descriptor, 0 (standard input). Access HT siblings only when they are in the allowed set. Fixes: a2b4d0f8bf07 ("tools/power turbostat: Favor cpu# over core#") Signed-off-by: Len Brown Reported-by: Artem Bityutskiy Signed-off-by: Sasha Levin

tools/power turbostat: Fix unrecognized option '-P'

2026-05-23T11:09:25+00:00

[ Upstream commit ce012c966b518c53475ba9a4e979242d7322d819 ] The '-P' short option (shorthand for --no-perf) is not present in the optstring of the second call to getopt_long_only(). This results in the "unrecognized option" error when the tool reaches the main parsing loop. Add 'P' to the second getopt_long_only() call to ensure it is consistently recognized. Fixes: a0e86c90b83c ("tools/power turbostat: Add --no-perf option") Signed-off-by: David Arcari Signed-off-by: Len Brown Signed-off-by: Sasha Levin

tools/power turbostat: Fix AMD RAPL regression on big systems

2026-05-23T11:09:24+00:00

[ Upstream commit 3ae6bafa104d93ddc525b8de547bf66b43fcaf10 ] turbostat.c:8688: rapl_perf_init: Assertion `next_domain < num_domains' failed. The initial fix for this regression was incomplete, as it did not handle multi-package systems with sparse core ids. Fixes: ef0e60083f76 ("tools/power turbostat: Fix AMD RAPL regression") Signed-off-by: Len Brown Signed-off-by: Sasha Levin

tools/power turbostat: Allow execution to continue after perf_l2_init() failure

2026-04-10T13:04:32+00:00

Currently, if perf_l2_init() fails turbostat exits after issuing the following error (which was encountered on AlderLake): turbostat: perf_l2_init(cpu0, 0x0, 0xff24) REFS: Invalid argument This occurs because perf_l2_init() calls err(). However, the code has been written in such a manner that it is able to perform cleanup and continue. Therefore, this issue can be addressed by changing the appropriate calls to err() to warnx(). Additionally, correct the PMU type arguments passed to the warning strings in the ecore and lcore blocks so the logs accurately reflect the failing counter type. Signed-off-by: David Arcari Signed-off-by: Len Brown

tools/power turbostat: Fix delimiter bug in print functions

2026-03-18T19:57:58+00:00

Commands that add counters, such as 'turbostat --show C1,C1+' display merged columns without a delimiter. This is caused by the bad syntax: '(*printed++ ? delim : "")', shared by print_name()/print_hex_value()/print_decimal_value()/print_float_value() Use '((*printed)++ ? delim : "")' to correctly increment the value at *printed. [lenb: fix code and commit message typo, re-word] Fixes: 56dbb878507b ("tools/power turbostat: Refactor added column header printing") Signed-off-by: Artem Bityutskiy Signed-off-by: Len Brown

tools/power turbostat: Fix --show/--hide for individual cpuidle counters

2026-03-18T03:39:42+00:00

Problem: individual swidle counter names (C1, C1+, C1-, etc.) cannot be selected via --show/--hide due to two bugs in probe_cpuidle_counts(): 1. The function returns immediately when BIC_cpuidle is not enabled, without checking deferred_add_index. 2. The deferred name check runs against name_buf before the trailing newline is stripped, so is_deferred_add("C1\n") never matches "C1". Fix: 1. Relax the early return to pass through when deferred names are queued. 2. Strip the trailing newline from name_buf before performing deferred name checks. 3. Check each suffixed variant (C1+, C1, C1-) individually so that e.g. "--show C1+" enables only the requested metric. In addition, introduce a helper function to avoid repeating the condition (readability cleanup). Fixes: ec4acd3166d8 ("tools/power turbostat: disable "cpuidle" invocation counters, by default") Signed-off-by: Artem Bityutskiy Signed-off-by: Len Brown

tools/power turbostat: Fix incorrect format variable

2026-03-18T03:39:42+00:00

In the perf thread, core, and package counter loops, an incorrect 'mp->format' variable is used instead of 'pp->format'. [lenb: edit commit message] Fixes: 696d15cbd8c2 ("tools/power turbostat: Refactor floating point printout code") Signed-off-by: Artem Bityutskiy Signed-off-by: Len Brown

tools/power turbostat: Consistently use print_float_value()

2026-03-18T03:39:42+00:00

Fix the PMT thread code to use print_float_value(), to be consistent with the PMT core and package code. [lenb: commit message] Signed-off-by: Artem Bityutskiy Signed-off-by: Len Brown

tools/power/turbostat: Fix microcode patch level output for AMD/Hygon

2026-03-18T03:13:09+00:00

turbostat always used the same logic to read the microcode patch level, which is correct for Intel but not for AMD/Hygon. While Intel stores the patch level in the upper 32 bits of MSR, AMD stores it in the lower 32 bits, which causes turbostat to report the microcode version as 0x0 on AMD/Hygon. Fix by shifting right by 32 for non-AMD/Hygon, preserving the existing behavior for Intel and unknown vendors. Fixes: 3e4048466c39 ("tools/power turbostat: Add --no-msr option") Signed-off-by: Serhii Pievniev Signed-off-by: Len Brown