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tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL

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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>
This commit is contained in:
Len Brown 2015-04-01 21:02:57 -04:00
parent 40ee8e3b9d
commit 8a5bdf41d2
1 changed files with 38 additions and 1 deletions
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39
tools/power/x86/turbostat/turbostat.c
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@ -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");
}