From: Len Brown <len.br...@intel.com>
The "turbo-limit" is the maximum opportunistic processor
speed, assuming no electrical or thermal constraints.
For a given processor, the turbo-limit varies, depending
on the number of active cores. Generally, there is more
opportunity when fewer cores are active.
Under the "-v" verbose option, turbostat would
print the turbo-limits for the four cases
of 1 to 4 cores active.
Expand that capability to cover the cases of turbo
opportunities with up to 16 cores active.
Note that not all hardware platforms supply this information,
and that sometimes a valid limit may be specified for
a core which is not actually present.
Signed-off-by: Len Brown <len.br...@intel.com>
---
tools/power/x86/turbostat/turbostat.c | 95 ++++++++++++++++++++++++++++++++++-
1 file changed, 93 insertions(+), 2 deletions(-)
diff --git a/tools/power/x86/turbostat/turbostat.c
b/tools/power/x86/turbostat/turbostat.c
index 3c9dc54..5db4add 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -37,6 +37,7 @@
#define MSR_NEHALEM_PLATFORM_INFO 0xCE
#define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1AD
+#define MSR_IVT_TURBO_RATIO_LIMIT 0x1AE
#define MSR_APERF 0xE8
#define MSR_MPERF 0xE7
#define MSR_PKG_C2_RESIDENCY 0x60D /* SNB only */
@@ -61,6 +62,7 @@ unsigned int genuine_intel;
unsigned int has_invariant_tsc;
unsigned int do_nehalem_platform_info;
unsigned int do_nehalem_turbo_ratio_limit;
+unsigned int do_ivt_turbo_ratio_limit;
unsigned int extra_msr_offset;
double bclk;
unsigned int show_pkg;
@@ -676,6 +678,9 @@ void print_verbose_header(void)
get_msr(0, MSR_NEHALEM_PLATFORM_INFO, &msr);
+ if (verbose > 1)
+ fprintf(stderr, "MSR_NEHALEM_PLATFORM_INFO: 0x%llx\n", msr);
+
ratio = (msr >> 40) & 0xFF;
fprintf(stderr, "%d * %.0f = %.0f MHz max efficiency\n",
ratio, bclk, ratio * bclk);
@@ -684,14 +689,84 @@ void print_verbose_header(void)
fprintf(stderr, "%d * %.0f = %.0f MHz TSC frequency\n",
ratio, bclk, ratio * bclk);
+ if (!do_ivt_turbo_ratio_limit)
+ goto print_nhm_turbo_ratio_limits;
+
+ get_msr(0, MSR_IVT_TURBO_RATIO_LIMIT, &msr);
+
if (verbose > 1)
- fprintf(stderr, "MSR_NEHALEM_PLATFORM_INFO: 0x%llx\n", msr);
+ fprintf(stderr, "MSR_IVT_TURBO_RATIO_LIMIT: 0x%llx\n", msr);
+
+ ratio = (msr >> 56) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 16 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 48) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 15 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 40) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 14 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 32) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 13 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 24) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 12 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 16) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 11 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 8) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 10 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 0) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 9 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+print_nhm_turbo_ratio_limits:
if (!do_nehalem_turbo_ratio_limit)
return;
get_msr(0, MSR_NEHALEM_TURBO_RATIO_LIMIT, &msr);
+ if (verbose > 1)
+ fprintf(stderr, "MSR_NEHALEM_TURBO_RATIO_LIMIT: 0x%llx\n", msr);
+
+ ratio = (msr >> 56) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 8 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 48) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 7 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 40) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 6 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
+ ratio = (msr >> 32) & 0xFF;
+ if (ratio)
+ fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 5 active
cores\n",
+ ratio, bclk, ratio * bclk);
+
ratio = (msr >> 24) & 0xFF;
if (ratio)
fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 4 active
cores\n",
@@ -711,7 +786,6 @@ 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)
@@ -1045,6 +1119,22 @@ int has_nehalem_turbo_ratio_limit(unsigned int family,
unsigned int model)
return 0;
}
}
+int has_ivt_turbo_ratio_limit(unsigned int family, unsigned int model)
+{
+ if (!genuine_intel)
+ return 0;
+
+ if (family != 6)
+ return 0;
+
+ switch (model) {
+ case 0x3E: /* IVB Xeon */
+ return 1;
+ default:
+ return 0;
+ }
+}
+
int is_snb(unsigned int family, unsigned int model)
{
@@ -1144,6 +1234,7 @@ void check_cpuid()
bclk = discover_bclk(family, model);
do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family,
model);
+ do_ivt_turbo_ratio_limit = has_ivt_turbo_ratio_limit(family, model);
}
--
1.8.0.rc0.18.gf84667d
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
