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>
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 064749d..203d45d 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -89,6 +89,8 @@
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 @@
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 @@
}
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");
}