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Commit 3a9a941d authored by Len Brown's avatar Len Brown
Browse files

tools/power turbostat: decode MSR_*_PERF_LIMIT_REASONS 



The Processor generation code-named Haswell
added MSR_{CORE | GFX | RING}_PERF_LIMIT_REASONS
to explain when and how the processor limits frequency.

turbostat -v
will now decode these bits.

Each MSR has an "Active" set of bits which describe
current conditions, and a "Logged" set of bits,
which describe what has happened since last cleared.

Turbostat currently doesn't clear the log bits.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 98481e79

arch/x86/include/uapi/asm/msr-index.h

+4 −0
Original line number Diff line number Diff line
@@ -152,6 +152,10 @@ 
#define MSR_CC6_DEMOTION_POLICY_CONFIG	0x00000668

#define MSR_MC6_DEMOTION_POLICY_CONFIG	0x00000669



#define MSR_CORE_PERF_LIMIT_REASONS	0x00000690

#define MSR_GFX_PERF_LIMIT_REASONS	0x000006B0

#define MSR_RING_PERF_LIMIT_REASONS	0x000006B1



/* Hardware P state interface */

#define MSR_PPERF			0x0000064e

#define MSR_PERF_LIMIT_REASONS		0x0000064f

tools/power/x86/turbostat/turbostat.c

+126 −0
Original line number Diff line number Diff line
@@ -83,6 +83,9 @@ unsigned int tcc_activation_temp; 
unsigned int tcc_activation_temp_override;

double rapl_power_units, rapl_energy_units, rapl_time_units;

double rapl_joule_counter_range;

unsigned int do_core_perf_limit_reasons;

unsigned int do_gfx_perf_limit_reasons;

unsigned int do_ring_perf_limit_reasons;



#define RAPL_PKG		(1 << 0)

					/* 0x610 MSR_PKG_POWER_LIMIT */
@@ -1178,6 +1181,7 @@ void print_verbose_header(void) 
	if (ratio)

		fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n",

			ratio, bclk, ratio * bclk);



}



void free_all_buffers(void)
@@ -1594,6 +1598,103 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p) 
	return 0;

}



/*

 * print_perf_limit()

 */

int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data *p)

{

	unsigned long long msr;

	int cpu;



	cpu = t->cpu_id;



	/* per-package */

	if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))

		return 0;



	if (cpu_migrate(cpu)) {

		fprintf(stderr, "Could not migrate to CPU %d\n", cpu);

		return -1;

	}



	if (do_core_perf_limit_reasons) {

		get_msr(cpu, MSR_CORE_PERF_LIMIT_REASONS, &msr);

		fprintf(stderr, "cpu%d: MSR_CORE_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);

		fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)",

			(msr & 1 << 0) ? "PROCHOT, " : "",

			(msr & 1 << 1) ? "ThermStatus, " : "",

			(msr & 1 << 2) ? "bit2, " : "",

			(msr & 1 << 4) ? "Graphics, " : "",

			(msr & 1 << 5) ? "Auto-HWP, " : "",

			(msr & 1 << 6) ? "VR-Therm, " : "",

			(msr & 1 << 8) ? "Amps, " : "",

			(msr & 1 << 9) ? "CorePwr, " : "",

			(msr & 1 << 10) ? "PkgPwrL1, " : "",

			(msr & 1 << 11) ? "PkgPwrL2, " : "",

			(msr & 1 << 12) ? "MultiCoreTurbo, " : "",

			(msr & 1 << 13) ? "Transitions, " : "",

			(msr & 1 << 14) ? "bit14, " : "",

			(msr & 1 << 15) ? "bit15, " : "");

		fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)\n",

			(msr & 1 << 16) ? "PROCHOT, " : "",

			(msr & 1 << 17) ? "ThermStatus, " : "",

			(msr & 1 << 18) ? "bit18, " : "",

			(msr & 1 << 20) ? "Graphics, " : "",

			(msr & 1 << 21) ? "Auto-HWP, " : "",

			(msr & 1 << 22) ? "VR-Therm, " : "",

			(msr & 1 << 24) ? "Amps, " : "",

			(msr & 1 << 25) ? "CorePwr, " : "",

			(msr & 1 << 26) ? "PkgPwrL1, " : "",

			(msr & 1 << 27) ? "PkgPwrL2, " : "",

			(msr & 1 << 28) ? "MultiCoreTurbo, " : "",

			(msr & 1 << 29) ? "Transitions, " : "",

			(msr & 1 << 30) ? "bit30, " : "",

			(msr & 1 << 31) ? "bit31, " : "");



	}

	if (do_gfx_perf_limit_reasons) {

		get_msr(cpu, MSR_GFX_PERF_LIMIT_REASONS, &msr);

		fprintf(stderr, "cpu%d: MSR_GFX_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);

		fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s)",

			(msr & 1 << 0) ? "PROCHOT, " : "",

			(msr & 1 << 1) ? "ThermStatus, " : "",

			(msr & 1 << 4) ? "Graphics, " : "",

			(msr & 1 << 6) ? "VR-Therm, " : "",

			(msr & 1 << 8) ? "Amps, " : "",

			(msr & 1 << 9) ? "GFXPwr, " : "",

			(msr & 1 << 10) ? "PkgPwrL1, " : "",

			(msr & 1 << 11) ? "PkgPwrL2, " : "");

		fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s)\n",

			(msr & 1 << 16) ? "PROCHOT, " : "",

			(msr & 1 << 17) ? "ThermStatus, " : "",

			(msr & 1 << 20) ? "Graphics, " : "",

			(msr & 1 << 22) ? "VR-Therm, " : "",

			(msr & 1 << 24) ? "Amps, " : "",

			(msr & 1 << 25) ? "GFXPwr, " : "",

			(msr & 1 << 26) ? "PkgPwrL1, " : "",

			(msr & 1 << 27) ? "PkgPwrL2, " : "");

	}

	if (do_ring_perf_limit_reasons) {

		get_msr(cpu, MSR_RING_PERF_LIMIT_REASONS, &msr);

		fprintf(stderr, "cpu%d: MSR_RING_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);

		fprintf(stderr, " (Active: %s%s%s%s%s%s)",

			(msr & 1 << 0) ? "PROCHOT, " : "",

			(msr & 1 << 1) ? "ThermStatus, " : "",

			(msr & 1 << 6) ? "VR-Therm, " : "",

			(msr & 1 << 8) ? "Amps, " : "",

			(msr & 1 << 10) ? "PkgPwrL1, " : "",

			(msr & 1 << 11) ? "PkgPwrL2, " : "");

		fprintf(stderr, " (Logged: %s%s%s%s%s%s)\n",

			(msr & 1 << 16) ? "PROCHOT, " : "",

			(msr & 1 << 17) ? "ThermStatus, " : "",

			(msr & 1 << 22) ? "VR-Therm, " : "",

			(msr & 1 << 24) ? "Amps, " : "",

			(msr & 1 << 26) ? "PkgPwrL1, " : "",

			(msr & 1 << 27) ? "PkgPwrL2, " : "");

	}

	return 0;

}



#define	RAPL_POWER_GRANULARITY	0x7FFF	/* 15 bit power granularity */

#define	RAPL_TIME_GRANULARITY	0x3F /* 6 bit time granularity */
@@ -1683,6 +1784,27 @@ void rapl_probe(unsigned int family, unsigned int model) 
	return;

}



void perf_limit_reasons_probe(family, model)

{

	if (!genuine_intel)

		return;



	if (family != 6)

		return;



	switch (model) {

	case 0x3C:	/* HSW */

	case 0x45:	/* HSW */

	case 0x46:	/* HSW */

		do_gfx_perf_limit_reasons = 1;

	case 0x3F:	/* HSX */

		do_core_perf_limit_reasons = 1;

		do_ring_perf_limit_reasons = 1;

	default:

		return;

	}

}



int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p)

{

	unsigned long long msr;
@@ -2104,6 +2226,7 @@ void check_cpuid() 
	do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model);

	do_ivt_turbo_ratio_limit = has_ivt_turbo_ratio_limit(family, model);

	rapl_probe(family, model);

	perf_limit_reasons_probe(family, model);



	return;

}
@@ -2341,6 +2464,9 @@ void turbostat_init() 
	if (verbose)

		for_all_cpus(print_epb, ODD_COUNTERS);



	if (verbose)

		for_all_cpus(print_perf_limit, ODD_COUNTERS);



	if (verbose)

		for_all_cpus(print_rapl, ODD_COUNTERS);