From 3a9a941d0b9361eac81fb763a89fb465f70b1c28 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Fri, 15 Aug 2014 02:39:52 -0400 Subject: 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: Len Brown --- tools/power/x86/turbostat/turbostat.c | 126 ++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) (limited to 'tools/power') diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 6f29fc11fde6..58913096d7b2 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -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 @@ print_nhm_turbo_ratio_limits: 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); -- cgit v1.2.3-59-g8ed1b