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Commit 7f5c258e authored by Len Brown's avatar Len Brown
Browse files

tools/power turbostat: decode HWP registers 



 # turbostat --debug
...
CPUID(6): ... HWP, HWPnotify, HWPwindow, HWPepp, HWPpkg ...
...
cpu0: MSR_PM_ENABLE: 0x00000001 (HWP)
cpu0: MSR_HWP_CAPABILITIES: 0x01050916 (high 0x16 guar 0x9 eff 0x5 low 0x1)
cpu0: MSR_HWP_REQUEST: 0x80001604 (min 0x4 max 0x16 des 0x0 epp 0x80 window 0x0 pkg 0x0)
cpu0: MSR_HWP_INTERRUPT: 0x00000001 (EN_Guaranteed_Perf_Change, Dis_Excursion_Min)
cpu0: MSR_HWP_STATUS: 0x00000000 (No-Guaranteed_Perf_Change, No-Excursion_Min)

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 670e27d8

tools/power/x86/turbostat/turbostat.c

+118 −6
Original line number Diff line number Diff line
@@ -98,6 +98,12 @@ unsigned int crystal_hz; 
unsigned long long tsc_hz;

int base_cpu;

double discover_bclk(unsigned int family, unsigned int model);

unsigned int has_hwp;	/* IA32_PM_ENABLE, IA32_HWP_CAPABILITIES */

			/* IA32_HWP_REQUEST, IA32_HWP_STATUS */

unsigned int has_hwp_notify;		/* IA32_HWP_INTERRUPT */

unsigned int has_hwp_activity_window;	/* IA32_HWP_REQUEST[bits 41:32] */

unsigned int has_hwp_epp;		/* IA32_HWP_REQUEST[bits 31:24] */

unsigned int has_hwp_pkg;		/* IA32_HWP_REQUEST_PKG */



#define RAPL_PKG		(1 << 0)

					/* 0x610 MSR_PKG_POWER_LIMIT */
@@ -2041,6 +2047,97 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p) 


	return 0;

}

/*

 * print_hwp()

 * Decode the MSR_HWP_CAPABILITIES

 */

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

{

	unsigned long long msr;

	int cpu;



	if (!has_hwp)

		return 0;



	cpu = t->cpu_id;



	/* MSR_HWP_CAPABILITIES is 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 (get_msr(cpu, MSR_PM_ENABLE, &msr))

		return 0;



	fprintf(stderr, "cpu%d: MSR_PM_ENABLE: 0x%08llx (%sHWP)\n",

		cpu, msr, (msr & (1 << 0)) ? "" : "No-");



	/* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */

	if ((msr & (1 << 0)) == 0)

		return 0;



	if (get_msr(cpu, MSR_HWP_CAPABILITIES, &msr))

		return 0;



	fprintf(stderr, "cpu%d: MSR_HWP_CAPABILITIES: 0x%08llx "

			"(high 0x%x guar 0x%x eff 0x%x low 0x%x)\n",

			cpu, msr,

			(unsigned int)HWP_HIGHEST_PERF(msr),

			(unsigned int)HWP_GUARANTEED_PERF(msr),

			(unsigned int)HWP_MOSTEFFICIENT_PERF(msr),

			(unsigned int)HWP_LOWEST_PERF(msr));



	if (get_msr(cpu, MSR_HWP_REQUEST, &msr))

		return 0;



	fprintf(stderr, "cpu%d: MSR_HWP_REQUEST: 0x%08llx "

			"(min 0x%x max 0x%x des 0x%x epp 0x%x window 0x%x pkg 0x%x)\n",

			cpu, msr,

			(unsigned int)(((msr) >> 0) & 0xff),

			(unsigned int)(((msr) >> 8) & 0xff),

			(unsigned int)(((msr) >> 16) & 0xff),

			(unsigned int)(((msr) >> 24) & 0xff),

			(unsigned int)(((msr) >> 32) & 0xff3),

			(unsigned int)(((msr) >> 42) & 0x1));



	if (has_hwp_pkg) {

		if (get_msr(cpu, MSR_HWP_REQUEST_PKG, &msr))

			return 0;



		fprintf(stderr, "cpu%d: MSR_HWP_REQUEST_PKG: 0x%08llx "

			"(min 0x%x max 0x%x des 0x%x epp 0x%x window 0x%x)\n",

			cpu, msr,

			(unsigned int)(((msr) >> 0) & 0xff),

			(unsigned int)(((msr) >> 8) & 0xff),

			(unsigned int)(((msr) >> 16) & 0xff),

			(unsigned int)(((msr) >> 24) & 0xff),

			(unsigned int)(((msr) >> 32) & 0xff3));

	}

	if (has_hwp_notify) {

		if (get_msr(cpu, MSR_HWP_INTERRUPT, &msr))

			return 0;



		fprintf(stderr, "cpu%d: MSR_HWP_INTERRUPT: 0x%08llx "

			"(%s_Guaranteed_Perf_Change, %s_Excursion_Min)\n",

			cpu, msr,

			((msr) & 0x1) ? "EN" : "Dis",

			((msr) & 0x2) ? "EN" : "Dis");

	}

	if (get_msr(cpu, MSR_HWP_STATUS, &msr))

		return 0;



	fprintf(stderr, "cpu%d: MSR_HWP_STATUS: 0x%08llx "

			"(%sGuaranteed_Perf_Change, %sExcursion_Min)\n",

			cpu, msr,

			((msr) & 0x1) ? "" : "No-",

			((msr) & 0x2) ? "" : "No-");



	return 0;

}



/*

 * print_perf_limit()
@@ -2686,6 +2783,7 @@ void decode_misc_enable_msr(void) 
			msr & (1 << 18) ? "MONITOR" : "");

}





void process_cpuid()

{

	unsigned int eax, ebx, ecx, edx, max_level, max_extended_level;
@@ -2753,14 +2851,25 @@ void process_cpuid() 
	has_aperf = ecx & (1 << 0);

	do_dts = eax & (1 << 0);

	do_ptm = eax & (1 << 6);

	has_hwp = eax & (1 << 7);

	has_hwp_notify = eax & (1 << 8);

	has_hwp_activity_window = eax & (1 << 9);

	has_hwp_epp = eax & (1 << 10);

	has_hwp_pkg = eax & (1 << 11);

	has_epb = ecx & (1 << 3);



	if (debug)

		fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sEPB\n",

			has_aperf ? "" : "No ",

			do_dts ? "" : "No ",

			do_ptm ? "" : "No ",

			has_epb ? "" : "No ");

		fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sHWP, "

			"%sHWPnotify, %sHWPwindow, %sHWPepp, %sHWPpkg, %sEPB\n",

			has_aperf ? "" : "No-",

			do_dts ? "" : "No-",

			do_ptm ? "" : "No-",

			has_hwp ? "" : "No-",

			has_hwp_notify ? "" : "No-",

			has_hwp_activity_window ? "" : "No-",

			has_hwp_epp ? "" : "No-",

			has_hwp_pkg ? "" : "No-",

			has_epb ? "" : "No-");



	if (debug)

		decode_misc_enable_msr();
@@ -3087,6 +3196,9 @@ void turbostat_init() 
	process_cpuid();





	if (debug)

		for_all_cpus(print_hwp, ODD_COUNTERS);



	if (debug)

		for_all_cpus(print_epb, ODD_COUNTERS);
@@ -3164,7 +3276,7 @@ int get_and_dump_counters(void) 
}



void print_version() {

	fprintf(stderr, "turbostat version 4.9 22 Nov, 2015"

	fprintf(stderr, "turbostat version 4.10 10 Dec, 2015"

		" - Len Brown <lenb@kernel.org>\n");

}