Skip to content

Commit

Permalink
Merge branch 'pm-tools'
Browse files Browse the repository at this point in the history 
* pm-tools:
  tools/power turbostat: bugfix: TDP MSRs print bits fixing
  tools/power turbostat: correct output for MSR_NHM_SNB_PKG_CST_CFG_CTL dump
  tools/power turbostat: call __cpuid() instead of __get_cpuid()
  tools/power turbostat: indicate SMX and SGX support
  tools/power turbostat: detect and work around syscall jitter
  tools/power turbostat: show GFX%rc6
  tools/power turbostat: show GFXMHz
  tools/power turbostat: show IRQs per CPU
  tools/power turbostat: make fewer systems calls
  tools/power turbostat: fix compiler warnings
  tools/power turbostat: add --out option for saving output in a file
  tools/power turbostat: re-name "%Busy" field to "Busy%"
  tools/power turbostat: Intel Xeon x200: fix turbo-ratio decoding
  tools/power turbostat: Intel Xeon x200: fix erroneous bclk value
  tools/power turbostat: allow sub-sec intervals
  tools/power turbostat: Decode MSR_MISC_PWR_MGMT
  tools/power turbostat: decode HWP registers
  x86 msr-index: Simplify syntax for HWP fields
  tools/power turbostat: CPUID(0x16) leaf shows base, max, and bus frequency
  tools/power turbostat: decode more CPUID fields
  • Loading branch information
@rafaeljw
rafaeljw committed Mar 14, 2016
2 parents 93dffd0 + 3fdb746 commit 0d571b6
Show file tree
Hide file tree
Showing 3 changed files with 728 additions and 201 deletions.
8 changes: 4 additions & 4 deletions arch/x86/include/asm/msr-index.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -230,10 +230,10 @@
#define HWP_PACKAGE_LEVEL_REQUEST_BIT (1<<11)

/* IA32_HWP_CAPABILITIES */
#define HWP_HIGHEST_PERF(x) (x & 0xff)
#define HWP_GUARANTEED_PERF(x) ((x & (0xff << 8)) >>8)
#define HWP_MOSTEFFICIENT_PERF(x) ((x & (0xff << 16)) >>16)
#define HWP_LOWEST_PERF(x) ((x & (0xff << 24)) >>24)
#define HWP_HIGHEST_PERF(x) (((x) >> 0) & 0xff)
#define HWP_GUARANTEED_PERF(x) (((x) >> 8) & 0xff)
#define HWP_MOSTEFFICIENT_PERF(x) (((x) >> 16) & 0xff)
#define HWP_LOWEST_PERF(x) (((x) >> 24) & 0xff)

/* IA32_HWP_REQUEST */
#define HWP_MIN_PERF(x) (x & 0xff)
Expand Down
32 changes: 19 additions & 13 deletions tools/power/x86/turbostat/turbostat.8
View file
Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,10 @@ name as necessary to disambiguate it from others is necessary. Note that option
\fB--debug\fP displays additional system configuration information. Invoking this parameter
more than once may also enable internal turbostat debug information.
.PP
\fB--interval seconds\fP overrides the default 5-second measurement interval.
\fB--interval seconds\fP overrides the default 5.0 second measurement interval.
.PP
\fB--out output_file\fP turbostat output is written to the specified output_file.
The file is truncated if it already exists, and it is created if it does not exist.
.PP
\fB--help\fP displays usage for the most common parameters.
.PP
Expand All @@ -61,7 +64,7 @@ displays the statistics gathered since it was forked.
.nf
\fBCPU\fP Linux CPU (logical processor) number. Yes, it is okay that on many systems the CPUs are not listed in numerical order -- for efficiency reasons, turbostat runs in topology order, so HT siblings appear together.
\fBAVG_MHz\fP number of cycles executed divided by time elapsed.
\fB%Busy\fP percent of the interval that the CPU retired instructions, aka. % of time in "C0" state.
\fBBusy%\fP percent of the interval that the CPU retired instructions, aka. % of time in "C0" state.
\fBBzy_MHz\fP average clock rate while the CPU was busy (in "c0" state).
\fBTSC_MHz\fP average MHz that the TSC ran during the entire interval.
.fi
Expand All @@ -83,13 +86,14 @@ Note that multiple CPUs per core indicate support for Intel(R) Hyper-Threading T
\fBRAM_%\fP percent of the interval that RAPL throttling was active on DRAM.
.fi
.PP
.SH EXAMPLE
.SH PERIODIC EXAMPLE
Without any parameters, turbostat displays statistics ever 5 seconds.
(override interval with "-i sec" option, or specify a command
for turbostat to fork).
Periodic output goes to stdout, by default, unless --out is used to specify an output file.
The 5-second interval can be changed with th "-i sec" option.
Or a command may be specified as in "FORK EXAMPLE" below.
.nf
[root@hsw]# ./turbostat
CPU Avg_MHz %Busy Bzy_MHz TSC_MHz
CPU Avg_MHz Busy% Bzy_MHz TSC_MHz
- 488 12.51 3898 3498
0 0 0.01 3885 3498
4 3897 99.99 3898 3498
Expand Down Expand Up @@ -145,7 +149,7 @@ cpu0: MSR_IA32_THERM_STATUS: 0x88340000 (48 C +/- 1)
cpu1: MSR_IA32_THERM_STATUS: 0x88440000 (32 C +/- 1)
cpu2: MSR_IA32_THERM_STATUS: 0x88450000 (31 C +/- 1)
cpu3: MSR_IA32_THERM_STATUS: 0x88490000 (27 C +/- 1)
Core CPU Avg_MHz %Busy Bzy_MHz TSC_MHz SMI CPU%c1 CPU%c3 CPU%c6 CPU%c7 CoreTmp PkgTmp PkgWatt CorWatt GFXWatt
Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz SMI CPU%c1 CPU%c3 CPU%c6 CPU%c7 CoreTmp PkgTmp PkgWatt CorWatt GFXWatt
- - 493 12.64 3898 3498 0 12.64 0.00 0.00 74.72 47 47 21.62 13.74 0.00
0 0 4 0.11 3894 3498 0 99.89 0.00 0.00 0.00 47 47 21.62 13.74 0.00
0 4 3897 99.98 3898 3498 0 0.02
Expand All @@ -171,14 +175,16 @@ The --debug option adds additional columns to the measurement ouput, including C
See the field definitions above.
.SH FORK EXAMPLE
If turbostat is invoked with a command, it will fork that command
and output the statistics gathered when the command exits.
and output the statistics gathered after the command exits.
In this case, turbostat output goes to stderr, by default.
Output can instead be saved to a file using the --out option.
eg. Here a cycle soaker is run on 1 CPU (see %c0) for a few seconds
until ^C while the other CPUs are mostly idle:

.nf
root@hsw: turbostat cat /dev/zero > /dev/null
^C
CPU Avg_MHz %Busy Bzy_MHz TSC_MHz
CPU Avg_MHz Busy% Bzy_MHz TSC_MHz
- 482 12.51 3854 3498
0 0 0.01 1960 3498
4 0 0.00 2128 3498
Expand All @@ -192,12 +198,12 @@ root@hsw: turbostat cat /dev/zero > /dev/null

.fi
Above the cycle soaker drives cpu5 up its 3.9 GHz turbo limit.
The first row shows the average MHz and %Busy across all the processors in the system.
The first row shows the average MHz and Busy% across all the processors in the system.

Note that the Avg_MHz column reflects the total number of cycles executed
divided by the measurement interval. If the %Busy column is 100%,
divided by the measurement interval. If the Busy% column is 100%,
then the processor was running at that speed the entire interval.
The Avg_MHz multiplied by the %Busy results in the Bzy_MHz --
The Avg_MHz multiplied by the Busy% results in the Bzy_MHz --
which is the average frequency while the processor was executing --
not including any non-busy idle time.

Expand Down Expand Up @@ -233,7 +239,7 @@ in the brand string in /proc/cpuinfo. On a system where
the TSC stops in idle, TSC_MHz will drop
below the processor's base frequency.

%Busy = MPERF_delta/TSC_delta
Busy% = MPERF_delta/TSC_delta

Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval

Expand Down
Loading

0 comments on commit 0d571b6

Please sign in to comment.