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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>
This commit is contained in:
Hubert Chrzaniuk 2016-02-10 14:55:22 +01:00 committed by Len Brown
parent 121b48bb77
commit cbf97abaf3
1 changed files with 24 additions and 25 deletions
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49
tools/power/x86/turbostat/turbostat.c
View File

@ -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;
delta_ratio = (msr >> (i + 5)) & 0x7;
/** -ve ratios will make successive ratio calculations
* negative. Hence return instead of carrying on.
*/
if (ratio > 0)
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;