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tools/power turbostat: Add support for AMD Fam 17h (Zen) RAPL
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Based on the Open-Source Register Reference for AMD Family 17h
Processors Models 00h-2Fh:
https://support.amd.com/TechDocs/56255_OSRR.pdf

These processors report RAPL support in bit 14 of CPUID 0x80000007 EDX,
and the following MSRs are present:
0xc0010299 (RAPL_PWR_UNIT), like Intel's RAPL_POWER_UNIT
0xc001029a (CORE_ENERGY_STAT), kind of like Intel's PP0_ENERGY_STATUS
0xc001029b (PKG_ENERGY_STAT), like Intel's PKG_ENERGY_STATUS

A notable difference from the Intel implementation is that AMD reports
the "Cores" energy usage separately for each core, rather than a
per-package total. The code has been adjusted to handle either case in a
generic way.

I haven't yet enabled collection of package power, due to being unable
to test it on multi-node systems (TR, EPYC).

Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by: Len Brown <len.brown@intel.com>
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Calvin Walton authored and Len Brown committed Mar 21, 2019
1 parent 0a42d23 commit 9392bd9
Showing 1 changed file with 130 additions and 29 deletions.
159 changes: 130 additions & 29 deletions tools/power/x86/turbostat/turbostat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@
#include <cpuid.h>
#include <linux/capability.h>
#include <errno.h>
#include <math.h>

char *proc_stat = "/proc/stat";
FILE *outf;
Expand Down Expand Up @@ -140,9 +141,21 @@ unsigned int first_counter_read = 1;

#define RAPL_CORES_ENERGY_STATUS (1 << 9)
/* 0x639 MSR_PP0_ENERGY_STATUS */
#define RAPL_PER_CORE_ENERGY (1 << 10)
/* Indicates cores energy collection is per-core,
* not per-package. */
#define RAPL_AMD_F17H (1 << 11)
/* 0xc0010299 MSR_RAPL_PWR_UNIT */
/* 0xc001029a MSR_CORE_ENERGY_STAT */
/* 0xc001029b MSR_PKG_ENERGY_STAT */
#define RAPL_CORES (RAPL_CORES_ENERGY_STATUS | RAPL_CORES_POWER_LIMIT)
#define TJMAX_DEFAULT 100

/* MSRs that are not yet in the kernel-provided header. */
#define MSR_RAPL_PWR_UNIT 0xc0010299
#define MSR_CORE_ENERGY_STAT 0xc001029a
#define MSR_PKG_ENERGY_STAT 0xc001029b

#define MAX(a, b) ((a) > (b) ? (a) : (b))

/*
Expand Down Expand Up @@ -186,6 +199,7 @@ struct core_data {
unsigned long long c7;
unsigned long long mc6_us; /* duplicate as per-core for now, even though per module */
unsigned int core_temp_c;
unsigned int core_energy; /* MSR_CORE_ENERGY_STAT */
unsigned int core_id;
unsigned long long counter[MAX_ADDED_COUNTERS];
} *core_even, *core_odd;
Expand Down Expand Up @@ -684,6 +698,14 @@ void print_header(char *delim)
if (DO_BIC(BIC_CoreTmp))
outp += sprintf(outp, "%sCoreTmp", (printed++ ? delim : ""));

if (do_rapl && !rapl_joules) {
if (DO_BIC(BIC_CorWatt) && (do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, "%sCorWatt", (printed++ ? delim : ""));
} else if (do_rapl && rapl_joules) {
if (DO_BIC(BIC_Cor_J) && (do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, "%sCor_J", (printed++ ? delim : ""));
}

for (mp = sys.cp; mp; mp = mp->next) {
if (mp->format == FORMAT_RAW) {
if (mp->width == 64)
Expand Down Expand Up @@ -738,7 +760,7 @@ void print_header(char *delim)
if (do_rapl && !rapl_joules) {
if (DO_BIC(BIC_PkgWatt))
outp += sprintf(outp, "%sPkgWatt", (printed++ ? delim : ""));
if (DO_BIC(BIC_CorWatt))
if (DO_BIC(BIC_CorWatt) && !(do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, "%sCorWatt", (printed++ ? delim : ""));
if (DO_BIC(BIC_GFXWatt))
outp += sprintf(outp, "%sGFXWatt", (printed++ ? delim : ""));
Expand All @@ -751,7 +773,7 @@ void print_header(char *delim)
} else if (do_rapl && rapl_joules) {
if (DO_BIC(BIC_Pkg_J))
outp += sprintf(outp, "%sPkg_J", (printed++ ? delim : ""));
if (DO_BIC(BIC_Cor_J))
if (DO_BIC(BIC_Cor_J) && !(do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, "%sCor_J", (printed++ ? delim : ""));
if (DO_BIC(BIC_GFX_J))
outp += sprintf(outp, "%sGFX_J", (printed++ ? delim : ""));
Expand Down Expand Up @@ -812,6 +834,7 @@ int dump_counters(struct thread_data *t, struct core_data *c,
outp += sprintf(outp, "c6: %016llX\n", c->c6);
outp += sprintf(outp, "c7: %016llX\n", c->c7);
outp += sprintf(outp, "DTS: %dC\n", c->core_temp_c);
outp += sprintf(outp, "Joules: %0X\n", c->core_energy);

for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
outp += sprintf(outp, "cADDED [%d] msr0x%x: %08llX\n",
Expand Down Expand Up @@ -1045,6 +1068,20 @@ int format_counters(struct thread_data *t, struct core_data *c,
}
}

/*
* If measurement interval exceeds minimum RAPL Joule Counter range,
* indicate that results are suspect by printing "**" in fraction place.
*/
if (interval_float < rapl_joule_counter_range)
fmt8 = "%s%.2f";
else
fmt8 = "%6.0f**";

if (DO_BIC(BIC_CorWatt) && (do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), c->core_energy * rapl_energy_units / interval_float);
if (DO_BIC(BIC_Cor_J) && (do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), c->core_energy * rapl_energy_units);

/* print per-package data only for 1st core in package */
if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
goto done;
Expand Down Expand Up @@ -1097,26 +1134,17 @@ int format_counters(struct thread_data *t, struct core_data *c,
if (DO_BIC(BIC_SYS_LPI))
outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->sys_lpi / 1000000.0 / interval_float);

/*
* If measurement interval exceeds minimum RAPL Joule Counter range,
* indicate that results are suspect by printing "**" in fraction place.
*/
if (interval_float < rapl_joule_counter_range)
fmt8 = "%s%.2f";
else
fmt8 = "%6.0f**";

if (DO_BIC(BIC_PkgWatt))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_pkg * rapl_energy_units / interval_float);
if (DO_BIC(BIC_CorWatt))
if (DO_BIC(BIC_CorWatt) && !(do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_cores * rapl_energy_units / interval_float);
if (DO_BIC(BIC_GFXWatt))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_gfx * rapl_energy_units / interval_float);
if (DO_BIC(BIC_RAMWatt))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_dram * rapl_dram_energy_units / interval_float);
if (DO_BIC(BIC_Pkg_J))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_pkg * rapl_energy_units);
if (DO_BIC(BIC_Cor_J))
if (DO_BIC(BIC_Cor_J) && !(do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_cores * rapl_energy_units);
if (DO_BIC(BIC_GFX_J))
outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_gfx * rapl_energy_units);
Expand Down Expand Up @@ -1261,6 +1289,8 @@ delta_core(struct core_data *new, struct core_data *old)
old->core_temp_c = new->core_temp_c;
old->mc6_us = new->mc6_us - old->mc6_us;

DELTA_WRAP32(new->core_energy, old->core_energy);

for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
if (mp->format == FORMAT_RAW)
old->counter[i] = new->counter[i];
Expand Down Expand Up @@ -1403,6 +1433,7 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
c->c7 = 0;
c->mc6_us = 0;
c->core_temp_c = 0;
c->core_energy = 0;

p->pkg_wtd_core_c0 = 0;
p->pkg_any_core_c0 = 0;
Expand Down Expand Up @@ -1485,6 +1516,8 @@ int sum_counters(struct thread_data *t, struct core_data *c,

average.cores.core_temp_c = MAX(average.cores.core_temp_c, c->core_temp_c);

average.cores.core_energy += c->core_energy;

for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
if (mp->format == FORMAT_RAW)
continue;
Expand Down Expand Up @@ -1857,6 +1890,12 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
c->core_temp_c = tcc_activation_temp - ((msr >> 16) & 0x7F);
}

if (do_rapl & RAPL_AMD_F17H) {
if (get_msr(cpu, MSR_CORE_ENERGY_STAT, &msr))
return -14;
c->core_energy = msr & 0xFFFFFFFF;
}

for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
if (get_mp(cpu, mp, &c->counter[i]))
return -10;
Expand Down Expand Up @@ -3739,7 +3778,7 @@ int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data
#define RAPL_POWER_GRANULARITY 0x7FFF /* 15 bit power granularity */
#define RAPL_TIME_GRANULARITY 0x3F /* 6 bit time granularity */

double get_tdp(unsigned int model)
double get_tdp_intel(unsigned int model)
{
unsigned long long msr;

Expand All @@ -3756,6 +3795,16 @@ double get_tdp(unsigned int model)
}
}

double get_tdp_amd(unsigned int family)
{
switch (family) {
case 0x17:
default:
/* This is the max stock TDP of HEDT/Server Fam17h chips */
return 250.0;
}
}

/*
* rapl_dram_energy_units_probe()
* Energy units are either hard-coded, or come from RAPL Energy Unit MSR.
Expand All @@ -3775,21 +3824,12 @@ rapl_dram_energy_units_probe(int model, double rapl_energy_units)
}
}


/*
* rapl_probe()
*
* sets do_rapl, rapl_power_units, rapl_energy_units, rapl_time_units
*/
void rapl_probe(unsigned int family, unsigned int model)
void rapl_probe_intel(unsigned int family, unsigned int model)
{
unsigned long long msr;
unsigned int time_unit;
double tdp;

if (!genuine_intel)
return;

if (family != 6)
return;

Expand Down Expand Up @@ -3913,13 +3953,66 @@ void rapl_probe(unsigned int family, unsigned int model)

rapl_time_units = 1.0 / (1 << (time_unit));

tdp = get_tdp(model);
tdp = get_tdp_intel(model);

rapl_joule_counter_range = 0xFFFFFFFF * rapl_energy_units / tdp;
if (!quiet)
fprintf(outf, "RAPL: %.0f sec. Joule Counter Range, at %.0f Watts\n", rapl_joule_counter_range, tdp);
}

return;
void rapl_probe_amd(unsigned int family, unsigned int model)
{
unsigned long long msr;
unsigned int eax, ebx, ecx, edx;
unsigned int has_rapl = 0;
double tdp;

if (max_extended_level >= 0x80000007) {
__cpuid(0x80000007, eax, ebx, ecx, edx);
/* RAPL (Fam 17h) */
has_rapl = edx & (1 << 14);
}

if (!has_rapl)
return;

switch (family) {
case 0x17: /* Zen, Zen+ */
do_rapl = RAPL_AMD_F17H | RAPL_PER_CORE_ENERGY;
if (rapl_joules)
BIC_PRESENT(BIC_Cor_J);
else
BIC_PRESENT(BIC_CorWatt);
break;
default:
return;
}

if (get_msr(base_cpu, MSR_RAPL_PWR_UNIT, &msr))
return;

rapl_time_units = ldexp(1.0, -(msr >> 16 & 0xf));
rapl_energy_units = ldexp(1.0, -(msr >> 8 & 0x1f));
rapl_power_units = ldexp(1.0, -(msr & 0xf));

tdp = get_tdp_amd(model);

rapl_joule_counter_range = 0xFFFFFFFF * rapl_energy_units / tdp;
if (!quiet)
fprintf(outf, "RAPL: %.0f sec. Joule Counter Range, at %.0f Watts\n", rapl_joule_counter_range, tdp);
}

/*
* rapl_probe()
*
* sets do_rapl, rapl_power_units, rapl_energy_units, rapl_time_units
*/
void rapl_probe(unsigned int family, unsigned int model)
{
if (genuine_intel)
rapl_probe_intel(family, model);
if (authentic_amd)
rapl_probe_amd(family, model);
}

void perf_limit_reasons_probe(unsigned int family, unsigned int model)
Expand Down Expand Up @@ -4024,6 +4117,7 @@ void print_power_limit_msr(int cpu, unsigned long long msr, char *label)
int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
{
unsigned long long msr;
const char *msr_name;
int cpu;

if (!do_rapl)
Expand All @@ -4039,10 +4133,17 @@ int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
return -1;
}

if (get_msr(cpu, MSR_RAPL_POWER_UNIT, &msr))
return -1;
if (do_rapl & RAPL_AMD_F17H) {
msr_name = "MSR_RAPL_PWR_UNIT";
if (get_msr(cpu, MSR_RAPL_PWR_UNIT, &msr))
return -1;
} else {
msr_name = "MSR_RAPL_POWER_UNIT";
if (get_msr(cpu, MSR_RAPL_POWER_UNIT, &msr))
return -1;
}

fprintf(outf, "cpu%d: MSR_RAPL_POWER_UNIT: 0x%08llx (%f Watts, %f Joules, %f sec.)\n", cpu, msr,
fprintf(outf, "cpu%d: %s: 0x%08llx (%f Watts, %f Joules, %f sec.)\n", cpu, msr_name, msr,
rapl_power_units, rapl_energy_units, rapl_time_units);

if (do_rapl & RAPL_PKG_POWER_INFO) {
Expand Down

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