aboutsummaryrefslogtreecommitdiffstats
path: root/tools
diff options
context:
space:
mode:
authorAndrey Semin <andrey.semin@intel.com>2014-12-05 00:07:00 -0500
committerLen Brown <len.brown@intel.com>2015-04-18 14:20:52 -0400
commit40ee8e3b9dc8917e6077dde6a49c7a71d63b0231 (patch)
tree2797cc36f7470ce78938d0b945d1ee01c1217d35 /tools
parent0b2bb6925eb602eae993a4b5c282a8c18ad1c949 (diff)
tools/power turbostat: correct DRAM RAPL units on recent Xeon processors
While not yet documented in the Software Developer's Manual, the data-sheet for modern Xeon states that DRAM RAPL ENERGY units are fixed at 15.3 uJ, rather than being discovered via MSR. Before this patch, DRAM energy on these products is over-stated by turbostat because the RAPL units are 4x larger. ref: "Xeon E5-2600 v3/E5-1600 v3 Datasheet Volume 2" http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v3-datasheet-vol-2.pdf Signed-off-by: Andrey Semin <andrey.semin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/power/x86/turbostat/turbostat.c28
1 files changed, 25 insertions, 3 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index ad5688914446..064749de75b1 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -83,7 +83,8 @@ unsigned int do_dts;
unsigned int do_ptm;
unsigned int tcc_activation_temp;
unsigned int tcc_activation_temp_override;
-double rapl_power_units, rapl_energy_units, rapl_time_units;
+double rapl_power_units, rapl_time_units;
+double rapl_dram_energy_units, rapl_energy_units;
double rapl_joule_counter_range;
unsigned int do_core_perf_limit_reasons;
unsigned int do_gfx_perf_limit_reasons;
@@ -600,7 +601,7 @@ int format_counters(struct thread_data *t, struct core_data *c,
if (do_rapl & RAPL_GFX)
outp += sprintf(outp, fmt8, p->energy_gfx * rapl_energy_units / interval_float);
if (do_rapl & RAPL_DRAM)
- outp += sprintf(outp, fmt8, p->energy_dram * rapl_energy_units / interval_float);
+ outp += sprintf(outp, fmt8, p->energy_dram * rapl_dram_energy_units / interval_float);
if (do_rapl & RAPL_PKG_PERF_STATUS)
outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
if (do_rapl & RAPL_DRAM_PERF_STATUS)
@@ -617,7 +618,7 @@ int format_counters(struct thread_data *t, struct core_data *c,
p->energy_gfx * rapl_energy_units);
if (do_rapl & RAPL_DRAM)
outp += sprintf(outp, fmt8,
- p->energy_dram * rapl_energy_units);
+ p->energy_dram * rapl_dram_energy_units);
if (do_rapl & RAPL_PKG_PERF_STATUS)
outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
if (do_rapl & RAPL_DRAM_PERF_STATUS)
@@ -1935,6 +1936,25 @@ double get_tdp(model)
}
}
+/*
+ * rapl_dram_energy_units_probe()
+ * Energy units are either hard-coded, or come from RAPL Energy Unit MSR.
+ */
+static double
+rapl_dram_energy_units_probe(int model, double rapl_energy_units)
+{
+ /* only called for genuine_intel, family 6 */
+
+ switch (model) {
+ case 0x3F: /* HSX */
+ case 0x4F: /* BDX */
+ case 0x56: /* BDX-DE */
+ return (rapl_dram_energy_units = 15.3 / 1000000);
+ default:
+ return (rapl_energy_units);
+ }
+}
+
/*
* rapl_probe()
@@ -1994,6 +2014,8 @@ void rapl_probe(unsigned int family, unsigned int model)
else
rapl_energy_units = 1.0 / (1 << (msr >> 8 & 0x1F));
+ rapl_dram_energy_units = rapl_dram_energy_units_probe(model, rapl_energy_units);
+
time_unit = msr >> 16 & 0xF;
if (time_unit == 0)
time_unit = 0xA;

Privacy Policy