diff options
| author | Len Brown <len.brown@intel.com> | 2017-01-21 01:26:16 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2017-03-01 00:14:11 -0500 |
| commit | 33148d671cc191fceaca5017e1bb060e9f30fbf7 (patch) | |
| tree | ceabb98bd692a541e52da27786692c0c03d02756 | |
| parent | 98af74599ea0757098a5776ea29e581b661dcf6f (diff) | |
| download | lwn-33148d671cc191fceaca5017e1bb060e9f30fbf7.tar.gz lwn-33148d671cc191fceaca5017e1bb060e9f30fbf7.zip | |
tools/power turbostat: decode MSR_MISC_FEATURE_CONTROL
useful for observing if the BIOS disabled prefetch
Not architectural, but docuemented as present on NHM, SNB
and is present on others.
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 1011b5f7f21f..2f033f3d2a21 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -102,6 +102,7 @@ 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 */ +unsigned int has_misc_feature_control; #define RAPL_PKG (1 << 0) /* 0x610 MSR_PKG_POWER_LIMIT */ @@ -2466,6 +2467,7 @@ void check_permissions() * * Side effect: * sets global pkg_cstate_limit to decode MSR_PKG_CST_CONFIG_CONTROL + * sets has_misc_feature_control */ int probe_nhm_msrs(unsigned int family, unsigned int model) { @@ -2496,6 +2498,7 @@ int probe_nhm_msrs(unsigned int family, unsigned int model) case INTEL_FAM6_IVYBRIDGE: /* IVB */ case INTEL_FAM6_IVYBRIDGE_X: /* IVB Xeon */ pkg_cstate_limits = snb_pkg_cstate_limits; + has_misc_feature_control = 1; break; case INTEL_FAM6_HASWELL_CORE: /* HSW */ case INTEL_FAM6_HASWELL_X: /* HSX */ @@ -2510,9 +2513,11 @@ int probe_nhm_msrs(unsigned int family, unsigned int model) case INTEL_FAM6_KABYLAKE_MOBILE: /* KBL */ case INTEL_FAM6_KABYLAKE_DESKTOP: /* KBL */ pkg_cstate_limits = hsw_pkg_cstate_limits; + has_misc_feature_control = 1; break; case INTEL_FAM6_SKYLAKE_X: /* SKX */ pkg_cstate_limits = skx_pkg_cstate_limits; + has_misc_feature_control = 1; break; case INTEL_FAM6_ATOM_SILVERMONT1: /* BYT */ no_MSR_MISC_PWR_MGMT = 1; @@ -3579,6 +3584,21 @@ void decode_misc_enable_msr(void) msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ? "No-" : ""); } +void decode_misc_feature_control(void) +{ + unsigned long long msr; + + if (!has_misc_feature_control) + return; + + if (!get_msr(base_cpu, MSR_MISC_FEATURE_CONTROL, &msr)) + fprintf(outf, "cpu%d: MSR_MISC_FEATURE_CONTROL: 0x%08llx (%sL2-Prefetch %sL2-Prefetch-pair %sL1-Prefetch %sL1-IP-Prefetch)\n", + base_cpu, msr, + msr & (0 << 0) ? "No-" : "", + msr & (1 << 0) ? "No-" : "", + msr & (2 << 0) ? "No-" : "", + msr & (3 << 0) ? "No-" : ""); +} /* * Decode MSR_MISC_PWR_MGMT * @@ -3725,6 +3745,7 @@ void process_cpuid() if (debug) decode_misc_enable_msr(); + if (max_level >= 0x7 && debug) { int has_sgx; @@ -3852,6 +3873,9 @@ void process_cpuid() if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK)) BIC_PRESENT(BIC_GFXMHz); + if (debug) + decode_misc_feature_control(); + return; } |