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| author | Zhang Rui <rui.zhang@intel.com> | 2023-07-31 14:02:11 +0800 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2023-09-27 22:14:17 +0800 |
| commit | 4d1827485acecac0016eaaec199e97697afdaa84 (patch) | |
| tree | 4a55d39becb455b5852de40066f52ddaebf40ce8 /tools/perf/scripts/python | |
| parent | Linux 6.6-rc1 (diff) | |
| download | linux-4d1827485acecac0016eaaec199e97697afdaa84.tar.gz linux-4d1827485acecac0016eaaec199e97697afdaa84.zip | |
tools/power/turbostat: Fix failure with new uncore sysfs
On some platforms, turbostat fails during launch time like below,
turbostat version 2023.03.17 - Len Brown <lenb@kernel.org>
...
cpu40: MSR_IA32_PACKAGE_THERM_STATUS: 0x884c0000 (24 C)
cpu40: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C)
turbostat: snapshot_sysfs_counter(/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz): No data available
This is because new uncore sysfs is used on these platforms as
introduced by commit 9b8dea80e3cb ("platform/x86/intel-uncore-freq:
Support for cluster level controls").
With the new uncore sysfs interface,
/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz
is still available, but reading it fails.
How to support the fabric cluster level uncore sysfs is not settled yet,
as a short term fix, clear the BIC_UNCORE_MHZ bit when new sysfs I/F is
detected.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions