diff options
| author | Len Brown <len.brown@intel.com> | 2015-04-01 21:02:57 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2015-04-18 14:20:52 -0400 |
| commit | 8a5bdf41d2c027c1e4ad62bc4f96f3fdf82070ba (patch) | |
| tree | 50d4b76564cdb750b3b602dda3f35ef76a8a5cd7 /tools | |
| parent | 40ee8e3b9dc8917e6077dde6a49c7a71d63b0231 (diff) | |
| download | linux-8a5bdf41d2c027c1e4ad62bc4f96f3fdf82070ba.tar.bz2 | |
tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL
turbostat --debug
...
CPUID(0x15): eax_crystal: 2 ebx_tsc: 100 ecx_crystal_hz: 0
TSC: 1200 MHz (24000000 Hz * 100 / 2 / 1000000)
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 064749de75b1..203d45d0a560 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -89,6 +89,8 @@ double rapl_joule_counter_range; unsigned int do_core_perf_limit_reasons; unsigned int do_gfx_perf_limit_reasons; unsigned int do_ring_perf_limit_reasons; +unsigned int crystal_hz; +unsigned long long tsc_hz; #define RAPL_PKG (1 << 0) /* 0x610 MSR_PKG_POWER_LIMIT */ @@ -2496,6 +2498,41 @@ void process_cpuid() do_ptm ? "" : "No ", has_epb ? "" : "No "); + if (max_level > 0x15) { + unsigned int eax_crystal; + unsigned int ebx_tsc; + + /* + * CPUID 15H TSC/Crystal ratio, possibly Crystal Hz + */ + eax_crystal = ebx_tsc = crystal_hz = edx = 0; + __get_cpuid(0x15, &eax_crystal, &ebx_tsc, &crystal_hz, &edx); + + if (ebx_tsc != 0) { + + if (debug && (ebx != 0)) + fprintf(stderr, "CPUID(0x15): eax_crystal: %d ebx_tsc: %d ecx_crystal_hz: %d\n", + eax_crystal, ebx_tsc, crystal_hz); + + if (crystal_hz == 0) + switch(model) { + case 0x4E: /* SKL */ + case 0x5E: /* SKL */ + crystal_hz = 24000000; /* 24 MHz */ + break; + default: + crystal_hz = 0; + } + + if (crystal_hz) { + tsc_hz = (unsigned long long) crystal_hz * ebx_tsc / eax_crystal; + if (debug) + fprintf(stderr, "TSC: %lld MHz (%d Hz * %d / %d / 1000000)\n", + tsc_hz / 1000000, crystal_hz, ebx_tsc, eax_crystal); + } + } + } + do_nhm_platform_info = do_nhm_cstates = do_smi = probe_nhm_msrs(family, model); do_snb_cstates = has_snb_msrs(family, model); do_pc2 = do_snb_cstates && (pkg_cstate_limit >= PCL__2); @@ -2834,7 +2871,7 @@ int get_and_dump_counters(void) } void print_version() { - fprintf(stderr, "turbostat version 4.3 24 Mar, 2015" + fprintf(stderr, "turbostat version 4.4 2 Apr, 2015" " - Len Brown <lenb@kernel.org>\n"); } |