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| author | Len Brown <len.brown@intel.com> | 2016-04-06 17:15:57 -0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-04-07 22:18:35 +0200 |
| commit | e8efbc80db5e824ce2382d5e65429b6b493e71e2 (patch) | |
| tree | 12b286bf50be919530d7b40fb4c2fc3c8fdcc888 /tools | |
| parent | e4085d543e256aff6606ba99ed257f7c06685f3b (diff) | |
| download | lwn-e8efbc80db5e824ce2382d5e65429b6b493e71e2.tar.gz lwn-e8efbc80db5e824ce2382d5e65429b6b493e71e2.zip | |
tools/power turbostat: decode BXT TSC frequency via CPUID
Hard-code BXT ART to 19200MHz, so turbostat --debug
can fully enumerate TSC:
CPUID(0x15): eax_crystal: 3 ebx_tsc: 186 ecx_crystal_hz: 0
TSC: 1190 MHz (19200000 Hz * 186 / 3 / 1000000)
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 96d8eafdd380..b15c84323b73 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -3278,7 +3278,10 @@ void process_cpuid() switch(model) { case 0x4E: /* SKL */ case 0x5E: /* SKL */ - crystal_hz = 24000000; /* 24 MHz */ + crystal_hz = 24000000; /* 24.0 MHz */ + break; + case 0x5C: /* BXT */ + crystal_hz = 19200000; /* 19.2 MHz */ break; default: crystal_hz = 0; |