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authorHubert Chrzaniuk <hubert.chrzaniuk@intel.com>2016-02-10 14:55:22 +0100
committerLen Brown <len.brown@intel.com>2016-03-13 03:55:38 -0400
commitcbf97abaf3689652bcddc0741dc49629d1838142 (patch)
treec085bc92795c8807a5923542490ecb19c3f21c7d /tools
parent121b48bb77187cf2ed3053e147d2e6c1e864083c (diff)
downloadlinux-cbf97abaf3689652bcddc0741dc49629d1838142.tar.bz2
tools/power turbostat: Intel Xeon x200: fix turbo-ratio decoding
Following changes have been made: - changed MSR_NHM_TURBO_RATIO_LIMIT to MSR_TURBO_RATIO_LIMIT in debug print for consistency with Developer Manual - updated definition of bitfields in MSR_TURBO_RATIO_LIMIT and appropriate parsing code - added x200 to list of architectures that do not support Nahlem compatible definition of MSR_TURBO_RATIO_LIMIT register (x200 has the register but bits definition is custom) - fixed typo in code that parses MSR_TURBO_RATIO_LIMIT (logical instead of bitwise operator) - changed MSR_TURBO_RATIO_LIMIT parsing algorithm so the print out had the same order as implementations for other platforms Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/power/x86/turbostat/turbostat.c53
1 files changed, 26 insertions, 27 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 652d08df5d12..4e5386d04709 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1328,21 +1328,23 @@ dump_nhm_turbo_ratio_limits(void)
static void
dump_knl_turbo_ratio_limits(void)
{
- int cores;
- unsigned int ratio;
+ const unsigned int buckets_no = 7;
+
unsigned long long msr;
- int delta_cores;
- int delta_ratio;
- int i;
+ int delta_cores, delta_ratio;
+ int i, b_nr;
+ unsigned int cores[buckets_no];
+ unsigned int ratio[buckets_no];
get_msr(base_cpu, MSR_NHM_TURBO_RATIO_LIMIT, &msr);
- fprintf(stderr, "cpu%d: MSR_NHM_TURBO_RATIO_LIMIT: 0x%08llx\n",
+ fprintf(stderr, "cpu%d: MSR_TURBO_RATIO_LIMIT: 0x%08llx\n",
base_cpu, msr);
/**
* Turbo encoding in KNL is as follows:
- * [7:0] -- Base value of number of active cores of bucket 1.
+ * [0] -- Reserved
+ * [7:1] -- Base value of number of active cores of bucket 1.
* [15:8] -- Base value of freq ratio of bucket 1.
* [20:16] -- +ve delta of number of active cores of bucket 2.
* i.e. active cores of bucket 2 =
@@ -1361,29 +1363,25 @@ dump_knl_turbo_ratio_limits(void)
* [60:56]-- +ve delta of number of active cores of bucket 7.
* [63:61]-- -ve delta of freq ratio of bucket 7.
*/
- cores = msr & 0xFF;
- ratio = (msr >> 8) && 0xFF;
- if (ratio > 0)
- fprintf(stderr,
- "%d * %.0f = %.0f MHz max turbo %d active cores\n",
- ratio, bclk, ratio * bclk, cores);
-
- for (i = 16; i < 64; i = i + 8) {
+
+ b_nr = 0;
+ cores[b_nr] = (msr & 0xFF) >> 1;
+ ratio[b_nr] = (msr >> 8) & 0xFF;
+
+ for (i = 16; i < 64; i += 8) {
delta_cores = (msr >> i) & 0x1F;
- delta_ratio = (msr >> (i + 5)) && 0x7;
- if (!delta_cores || !delta_ratio)
- return;
- cores = cores + delta_cores;
- ratio = ratio - delta_ratio;
-
- /** -ve ratios will make successive ratio calculations
- * negative. Hence return instead of carrying on.
- */
- if (ratio > 0)
+ delta_ratio = (msr >> (i + 5)) & 0x7;
+
+ cores[b_nr + 1] = cores[b_nr] + delta_cores;
+ ratio[b_nr + 1] = ratio[b_nr] - delta_ratio;
+ b_nr++;
+ }
+
+ for (i = buckets_no - 1; i >= 0; i--)
+ if (i > 0 ? ratio[i] != ratio[i - 1] : 1)
fprintf(stderr,
"%d * %.0f = %.0f MHz max turbo %d active cores\n",
- ratio, bclk, ratio * bclk, cores);
- }
+ ratio[i], bclk, ratio[i] * bclk, cores[i]);
}
static void
@@ -1896,6 +1894,7 @@ int has_nhm_turbo_ratio_limit(unsigned int family, unsigned int model)
/* Nehalem compatible, but do not include turbo-ratio limit support */
case 0x2E: /* Nehalem-EX Xeon - Beckton */
case 0x2F: /* Westmere-EX Xeon - Eagleton */
+ case 0x57: /* PHI - Knights Landing (different MSR definition) */
return 0;
default:
return 1;