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tools/power turbostat: enable turbostat to support Knights Landing (KNL)
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Changes mainly to account for minor differences in Knights Landing(KNL):
1. KNL supports C1 and C6 core states.
2. KNL supports PC2, PC3 and PC6 package states.
3. KNL has a different encoding of the TURBO_RATIO_LIMIT MSR

Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Dasaratharaman Chandramouli authored and Len Brown committed May 27, 2015
1 parent e275b38 commit fb5d432
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Showing 2 changed files with 102 additions and 4 deletions.
1 change: 1 addition & 0 deletions arch/x86/include/uapi/asm/msr-index.h
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Original file line number Diff line number Diff line change
Expand Up @@ -140,6 +140,7 @@
#define MSR_CORE_C3_RESIDENCY 0x000003fc
#define MSR_CORE_C6_RESIDENCY 0x000003fd
#define MSR_CORE_C7_RESIDENCY 0x000003fe
#define MSR_KNL_CORE_C6_RESIDENCY 0x000003ff
#define MSR_PKG_C2_RESIDENCY 0x0000060d
#define MSR_PKG_C8_RESIDENCY 0x00000630
#define MSR_PKG_C9_RESIDENCY 0x00000631
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105 changes: 101 additions & 4 deletions tools/power/x86/turbostat/turbostat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@ unsigned int skip_c0;
unsigned int skip_c1;
unsigned int do_nhm_cstates;
unsigned int do_snb_cstates;
unsigned int do_knl_cstates;
unsigned int do_pc2;
unsigned int do_pc3;
unsigned int do_pc6;
Expand Down Expand Up @@ -316,7 +317,7 @@ void print_header(void)

if (do_nhm_cstates)
outp += sprintf(outp, " CPU%%c1");
if (do_nhm_cstates && !do_slm_cstates)
if (do_nhm_cstates && !do_slm_cstates && !do_knl_cstates)
outp += sprintf(outp, " CPU%%c3");
if (do_nhm_cstates)
outp += sprintf(outp, " CPU%%c6");
Expand Down Expand Up @@ -546,7 +547,7 @@ int format_counters(struct thread_data *t, struct core_data *c,
if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
goto done;

if (do_nhm_cstates && !do_slm_cstates)
if (do_nhm_cstates && !do_slm_cstates && !do_knl_cstates)
outp += sprintf(outp, "%8.2f", 100.0 * c->c3/t->tsc);
if (do_nhm_cstates)
outp += sprintf(outp, "%8.2f", 100.0 * c->c6/t->tsc);
Expand Down Expand Up @@ -1018,14 +1019,17 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
return 0;

if (do_nhm_cstates && !do_slm_cstates) {
if (do_nhm_cstates && !do_slm_cstates && !do_knl_cstates) {
if (get_msr(cpu, MSR_CORE_C3_RESIDENCY, &c->c3))
return -6;
}

if (do_nhm_cstates) {
if (do_nhm_cstates && !do_knl_cstates) {
if (get_msr(cpu, MSR_CORE_C6_RESIDENCY, &c->c6))
return -7;
} else if (do_knl_cstates) {
if (get_msr(cpu, MSR_KNL_CORE_C6_RESIDENCY, &c->c6))
return -7;
}

if (do_snb_cstates)
Expand Down Expand Up @@ -1295,6 +1299,67 @@ dump_nhm_turbo_ratio_limits(void)
return;
}

static void
dump_knl_turbo_ratio_limits(void)
{
int cores;
unsigned int ratio;
unsigned long long msr;
int delta_cores;
int delta_ratio;
int i;

get_msr(0, MSR_NHM_TURBO_RATIO_LIMIT, &msr);

fprintf(stderr, "cpu0: MSR_NHM_TURBO_RATIO_LIMIT: 0x%08llx\n",
msr);

/**
* Turbo encoding in KNL is as follows:
* [7:0] -- 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 =
* active cores of bucket 1 + delta
* [23:21] -- Negative delta of freq ratio of bucket 2.
* i.e. freq ratio of bucket 2 =
* freq ratio of bucket 1 - delta
* [28:24]-- +ve delta of number of active cores of bucket 3.
* [31:29]-- -ve delta of freq ratio of bucket 3.
* [36:32]-- +ve delta of number of active cores of bucket 4.
* [39:37]-- -ve delta of freq ratio of bucket 4.
* [44:40]-- +ve delta of number of active cores of bucket 5.
* [47:45]-- -ve delta of freq ratio of bucket 5.
* [52:48]-- +ve delta of number of active cores of bucket 6.
* [55:53]-- -ve delta of freq ratio of bucket 6.
* [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) {
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)
fprintf(stderr,
"%d * %.0f = %.0f MHz max turbo %d active cores\n",
ratio, bclk, ratio * bclk, cores);
}
}

static void
dump_nhm_cst_cfg(void)
{
Expand Down Expand Up @@ -1788,6 +1853,21 @@ int has_hsw_turbo_ratio_limit(unsigned int family, unsigned int model)
}
}

int has_knl_turbo_ratio_limit(unsigned int family, unsigned int model)
{
if (!genuine_intel)
return 0;

if (family != 6)
return 0;

switch (model) {
case 0x57: /* Knights Landing */
return 1;
default:
return 0;
}
}
static void
dump_cstate_pstate_config_info(family, model)
{
Expand All @@ -1805,6 +1885,9 @@ dump_cstate_pstate_config_info(family, model)
if (has_nhm_turbo_ratio_limit(family, model))
dump_nhm_turbo_ratio_limits();

if (has_knl_turbo_ratio_limit(family, model))
dump_knl_turbo_ratio_limits();

dump_nhm_cst_cfg();
}

Expand Down Expand Up @@ -1985,6 +2068,7 @@ rapl_dram_energy_units_probe(int model, double rapl_energy_units)
case 0x3F: /* HSX */
case 0x4F: /* BDX */
case 0x56: /* BDX-DE */
case 0x57: /* KNL */
return (rapl_dram_energy_units = 15.3 / 1000000);
default:
return (rapl_energy_units);
Expand Down Expand Up @@ -2026,6 +2110,7 @@ void rapl_probe(unsigned int family, unsigned int model)
case 0x3F: /* HSX */
case 0x4F: /* BDX */
case 0x56: /* BDX-DE */
case 0x57: /* KNL */
do_rapl = RAPL_PKG | RAPL_DRAM | RAPL_DRAM_POWER_INFO | RAPL_DRAM_PERF_STATUS | RAPL_PKG_PERF_STATUS | RAPL_PKG_POWER_INFO;
break;
case 0x2D:
Expand Down Expand Up @@ -2366,6 +2451,17 @@ int is_slm(unsigned int family, unsigned int model)
return 0;
}

int is_knl(unsigned int family, unsigned int model)
{
if (!genuine_intel)
return 0;
switch (model) {
case 0x57: /* KNL */
return 1;
}
return 0;
}

#define SLM_BCLK_FREQS 5
double slm_freq_table[SLM_BCLK_FREQS] = { 83.3, 100.0, 133.3, 116.7, 80.0};

Expand Down Expand Up @@ -2576,6 +2672,7 @@ void process_cpuid()
do_c8_c9_c10 = has_hsw_msrs(family, model);
do_skl_residency = has_skl_msrs(family, model);
do_slm_cstates = is_slm(family, model);
do_knl_cstates = is_knl(family, model);
bclk = discover_bclk(family, model);

rapl_probe(family, model);
Expand Down

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