turbostat(8) - phpMan

TURBOSTAT(8) System Manager's Manual TURBOSTAT(8)

NAME
turbostat - Report processor frequency and idle statistics

SYNOPSIS
turbostat [Options] command
turbostat [Options] [--interval seconds]

DESCRIPTION
turbostat reports processor topology, frequency, idle power-state statistics, temperature
and power on X86 processors. There are two ways to invoke turbostat. The first method is
to supply a command, which is forked and statistics are printed in one-shot upon its com-
pletion. The second method is to omit the command, and turbostat displays statistics
every 5 seconds interval. The 5-second interval can be changed using the --interval
option.

Some information is not available on older processors.

Options
Options can be specified with a single or double '-', and only as much of the option name
as necessary to disambiguate it from others is necessary. Note that options are case-sen-
sitive.

--add attributes add column with counter having specified 'attributes'. The 'location'
attribute is required, all others are optional.
location: {msrDDD | msr0xXXX | /sys/path...}
msrDDD is a decimal offset, eg. msr16
msr0xXXX is a hex offset, eg. msr0x10
/sys/path... is an absolute path to a sysfs attribute

scope: {cpu | core | package}
sample and print the counter for every cpu, core, or package.
default: cpu

size: {u32 | u64 }
MSRs are read as 64-bits, u32 truncates the displayed value to 32-bits.
default: u64

format: {raw | delta | percent}
'raw' shows the MSR contents in hex.
'delta' shows the difference in values during the measurement interval.
'percent' shows the delta as a percentage of the cycles elapsed.
default: delta

name: "name_string"
Any string that does not match a key-word above is used
as the column header.

--cpu cpu-set limit output to system summary plus the specified cpu-set. If cpu-set is
the string "core", then the system summary plus the first CPU in each core are printed --
eg. subsequent HT siblings are not printed. Or if cpu-set is the string "package", then
the system summary plus the first CPU in each package is printed. Otherwise, the system
summary plus the specified set of CPUs are printed. The cpu-set is ordered from low to
high, comma delimited with ".." and "-" permitted to denote a range. eg.
1,2,8,14..17,21-44

--hide column do not show the specified built-in columns. May be invoked multiple times,
or with a comma-separated list of column names. Use "--hide sysfs" to hide the sysfs sta-
tistics columns as a group.

--enable column show the specified built-in columns, which are otherwise disabled, by
default. Currently the only built-in counters disabled by default are "usec",
"Time_Of_Day_Seconds", "APIC" and "X2APIC". The column name "all" can be used to enable
all disabled-by-default built-in counters.

--show column show only the specified built-in columns. May be invoked multiple times, or
with a comma-separated list of column names. Use "--show sysfs" to show the sysfs statis-
tics columns as a group.

--Dump displays the raw counter values.

--quiet Do not decode and print the system configuration header information.

--interval seconds overrides the default 5.0 second measurement interval.

--num_iterations num number of the measurement iterations.

--out output_file 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.

--help displays usage for the most common parameters.

--Joules displays energy in Joules, rather than dividing Joules by time to print power in
Watts.

--list display column header names available for use by --show and --hide, then exit.

--Summary limits output to a 1-line System Summary for each interval.

--TCC temperature sets the Thermal Control Circuit temperature for systems which do not
export that value. This is used for making sense of the Digital Thermal Sensor outputs,
as they return degrees Celsius below the TCC activation temperature.

--version displays the version.

The command parameter forks command, and upon its exit, displays the statistics gathered
since it was forked.

ROW DESCRIPTIONS
The system configuration dump (if --quiet is not used) is followed by statistics. The
first row of the statistics labels the content of each column (below). The second row of
statistics is the system summary line. The system summary line has a '-' in the columns
for the Package, Core, and CPU. The contents of the system summary line depends on the
type of column. Columns that count items (eg. IRQ) show the sum across all CPUs in the
system. Columns that show a percentage show the average across all CPUs in the system.
Columns that dump raw MSR values simply show 0 in the summary. After the system summary
row, each row describes a specific Package/Core/CPU. Note that if the --cpu parameter is
used to limit which specific CPUs are displayed, turbostat will still collect statistics
for all CPUs in the system and will still show the system summary for all CPUs in the sys-
tem.

COLUMN DESCRIPTIONS
usec For each CPU, the number of microseconds elapsed during counter collection, including thread migration -- if any. This counter is disabled by default, and is enabled with "--enable usec", or --debug. On the summary row, usec refers to the total elapsed time to collect the counters on all cpus.
Time_Of_Day_Seconds For each CPU, the gettimeofday(2) value (seconds.subsec since Epoch) when the counters ending the measurement interval were collected. This column is disabled by default, and can be enabled with "--enable Time_Of_Day_Seconds" or "--debug". On the summary row, Time_Of_Day_Seconds refers to the timestamp following collection of counters on the last CPU.
Core processor core number. Note that multiple CPUs per core indicate support for Intel(R) Hyper-Threading Technology (HT).
CPU 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.
Package processor package number -- not present on systems with a single processor package.
Avg_MHz number of cycles executed divided by time elapsed. Note that this includes idle-time when 0 instructions are executed.
Busy% percent of the measurement interval that the CPU executes instructions, aka. % of time in "C0" state.
Bzy_MHz average clock rate while the CPU was not idle (ie. in "c0" state).
TSC_MHz average MHz that the TSC ran during the entire interval.
IRQ The number of interrupts serviced by that CPU during the measurement interval. The system total line is the sum of interrupts serviced across all CPUs. turbostat parses /proc/interrupts to generate this summary.
SMI The number of System Management Interrupts serviced CPU during the measurement interval. While this counter is actually per-CPU, SMI are triggered on all processors, so the number should be the same for all CPUs.
C1, C2, C3... The number times Linux requested the C1, C2, C3 idle state during the measurement interval. The system summary line shows the sum for all CPUs. These are C-state names as exported in /sys/devices/system/cpu/cpu*/cpuidle/state*/name. While their names are generic, their attributes are processor specific. They the system description section of output shows what MWAIT sub-states they are mapped to on each system.
C1%, C2%, C3% The residency percentage that Linux requested C1, C2, C3.... The system summary is the average of all CPUs in the system. Note that these are software, reflecting what was requested. The hardware counters reflect what was actually achieved.
CPU%c1, CPU%c3, CPU%c6, CPU%c7 show the percentage residency in hardware core idle states. These numbers are from hardware residency counters.
CoreTmp Degrees Celsius reported by the per-core Digital Thermal Sensor.
PkgTmp Degrees Celsius reported by the per-package Package Thermal Monitor.
GFX%rc6 The percentage of time the GPU is in the "render C6" state, rc6, during the measurement interval. From /sys/class/drm/card0/power/rc6_residency_ms.
GFXMHz Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz.
Pkg%pc2, Pkg%pc3, Pkg%pc6, Pkg%pc7 percentage residency in hardware package idle states. These numbers are from hardware residency counters.
PkgWatt Watts consumed by the whole package.
CorWatt Watts consumed by the core part of the package.
GFXWatt Watts consumed by the Graphics part of the package -- available only on client processors.
RAMWatt Watts consumed by the DRAM DIMMS -- available only on server processors.
PKG_% percent of the interval that RAPL throttling was active on the Package. Note that the system summary is the sum of the package throttling time, and thus may be higher than 100% on a multi-package system. Note that the meaning of this field is model specific. For example, some hardware increments this counter when RAPL responds to thermal limits, but does not increment this counter when RAPL responds to power limits. Comparing PkgWatt and PkgTmp to system limits is necessary.
RAM_% percent of the interval that RAPL throttling was active on DRAM.

TOO MUCH INFORMATION EXAMPLE
By default, turbostat dumps all possible information -- a system configuration header,
followed by columns for all counters. This is ideal for remote debugging, use the "--out"
option to save everything to a text file, and get that file to the expert helping you
debug.

When you are not interested in all that information, and there are several ways to see
only what you want. First the "--quiet" option will skip the configuration information,
and turbostat will show only the counter columns. Second, you can reduce the columns with
the "--hide" and "--show" options. If you use the "--show" option, then turbostat will
show only the columns you list. If you use the "--hide" option, turbostat will show all
columns, except the ones you list.

To find out what columns are available for --show and --hide, the "--list" option is
available. For convenience, the special strings "sysfs" can be used to refer to all of
the sysfs C-state counters at once:
sudo ./turbostat --show sysfs --quiet sleep 10
10.003837 sec
C1 C1E C3 C6 C7s C1% C1E% C3% C6% C7s%
4 21 2 2 459 0.14 0.82 0.00 0.00 98.93
1 17 2 2 130 0.00 0.02 0.00 0.00 99.80
0 0 0 0 31 0.00 0.00 0.00 0.00 99.95
2 1 0 0 52 1.14 6.49 0.00 0.00 92.21
1 2 0 0 52 0.00 0.08 0.00 0.00 99.86
0 0 0 0 71 0.00 0.00 0.00 0.00 99.89
0 0 0 0 25 0.00 0.00 0.00 0.00 99.96
0 0 0 0 74 0.00 0.00 0.00 0.00 99.94
0 1 0 0 24 0.00 0.00 0.00 0.00 99.84

ONE SHOT COMMAND EXAMPLE
If turbostat is invoked with a command, it will fork that command and output the statis-
tics 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. In this example,
the "sleep 10" command is forked, and turbostat waits for it to complete before saving all
statistics into "ts.out". Note that "sleep 10" is not part of turbostat, but is simply an
example of a command that turbostat can fork. The "ts.out" file is what you want to edit
in a very wide window, paste into a spreadsheet, or attach to a bugzilla entry.

[root@hsw]# ./turbostat -o ts.out sleep 10
[root@hsw]#

PERIODIC INTERVAL EXAMPLE
Without a command to fork, turbostat displays statistics ever 5 seconds. Periodic output
goes to stdout, by default, unless --out is used to specify an output file. The 5-second
interval can be changed with the "-i sec" option.
sudo ./turbostat --quiet --hide sysfs,IRQ,SMI,CoreTmp,PkgTmp,GFX%rc6,GFXMHz,PkgWatt,CorWatt,GFXWatt
Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c1 CPU%c3 CPU%c6 CPU%c7
- - 488 12.52 3900 3498 12.50 0.00 0.00 74.98
0 0 5 0.13 3900 3498 99.87 0.00 0.00 0.00
0 4 3897 99.99 3900 3498 0.01
1 1 0 0.00 3856 3498 0.01 0.00 0.00 99.98
1 5 0 0.00 3861 3498 0.01
2 2 1 0.02 3889 3498 0.03 0.00 0.00 99.95
2 6 0 0.00 3863 3498 0.05
3 3 0 0.01 3869 3498 0.02 0.00 0.00 99.97
3 7 0 0.00 3878 3498 0.03
Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c1 CPU%c3 CPU%c6 CPU%c7
- - 491 12.59 3900 3498 12.42 0.00 0.00 74.99
0 0 27 0.69 3900 3498 99.31 0.00 0.00 0.00
0 4 3898 99.99 3900 3498 0.01
1 1 0 0.00 3883 3498 0.01 0.00 0.00 99.99
1 5 0 0.00 3898 3498 0.01
2 2 0 0.01 3889 3498 0.02 0.00 0.00 99.98
2 6 0 0.00 3889 3498 0.02
3 3 0 0.00 3856 3498 0.01 0.00 0.00 99.99
3 7 0 0.00 3897 3498 0.01
This example also shows the use of the --hide option to skip columns that are not wanted.
Note that cpu4 in this example is 99.99% busy, while the other CPUs are all under 1% busy.
Notice that cpu4's HT sibling is cpu0, which is under 1% busy, but can get into CPU%c1
only, because its cpu4's activity on shared hardware keeps it from entering a deeper C-
state.

SYSTEM CONFIGURATION INFORMATION EXAMPLE
By default, turbostat always dumps system configuration information before taking measure-
ments. In the example above, "--quiet" is used to suppress that output. Here is an exam-
ple of the configuration information:
turbostat version 2017.02.15 - Len Brown <lenb AT kernel.org>
CPUID(0): GenuineIntel 13 CPUID levels; family:model:stepping 0x6:3c:3 (6:60:3)
CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM TM
CPUID(6): APERF, TURBO, DTS, PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, EPB
cpu4: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST No-MWAIT PREFETCH TURBO)
CPUID(7): No-SGX
cpu4: MSR_MISC_PWR_MGMT: 0x00400000 (ENable-EIST_Coordination DISable-EPB DISable-OOB)
RAPL: 3121 sec. Joule Counter Range, at 84 Watts
cpu4: MSR_PLATFORM_INFO: 0x80838f3012300
8 * 100.0 = 800.0 MHz max efficiency frequency
35 * 100.0 = 3500.0 MHz base frequency
cpu4: MSR_IA32_POWER_CTL: 0x0004005d (C1E auto-promotion: DISabled)
cpu4: MSR_TURBO_RATIO_LIMIT: 0x25262727
37 * 100.0 = 3700.0 MHz max turbo 4 active cores
38 * 100.0 = 3800.0 MHz max turbo 3 active cores
39 * 100.0 = 3900.0 MHz max turbo 2 active cores
39 * 100.0 = 3900.0 MHz max turbo 1 active cores
cpu4: MSR_CONFIG_TDP_NOMINAL: 0x00000023 (base_ratio=35)
cpu4: MSR_CONFIG_TDP_LEVEL_1: 0x00000000 ()
cpu4: MSR_CONFIG_TDP_LEVEL_2: 0x00000000 ()
cpu4: MSR_CONFIG_TDP_CONTROL: 0x80000000 ( lock=1)
cpu4: MSR_TURBO_ACTIVATION_RATIO: 0x00000000 (MAX_NON_TURBO_RATIO=0 lock=0)
cpu4: MSR_PKG_CST_CONFIG_CONTROL: 0x1e000400 (UNdemote-C3, UNdemote-C1, demote-C3, demote-C1, UNlocked: pkg-cstate-limit=0: pc0)
cpu4: POLL: CPUIDLE CORE POLL IDLE
cpu4: C1: MWAIT 0x00
cpu4: C1E: MWAIT 0x01
cpu4: C3: MWAIT 0x10
cpu4: C6: MWAIT 0x20
cpu4: C7s: MWAIT 0x32
cpu4: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch-pair L1-Prefetch L1-IP-Prefetch)
cpu0: MSR_IA32_ENERGY_PERF_BIAS: 0x00000006 (balanced)
cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x31200000 (Active: ) (Logged: Transitions, MultiCoreTurbo, Amps, Auto-HWP, )
cpu0: MSR_GFX_PERF_LIMIT_REASONS, 0x00000000 (Active: ) (Logged: )
cpu0: MSR_RING_PERF_LIMIT_REASONS, 0x0d000000 (Active: ) (Logged: Amps, PkgPwrL1, PkgPwrL2, )
cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 Joules, 0.000977 sec.)
cpu0: MSR_PKG_POWER_INFO: 0x000002a0 (84 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu0: MSR_PKG_POWER_LIMIT: 0x428348001a82a0 (UNlocked)
cpu0: PKG Limit #1: ENabled (84.000000 Watts, 8.000000 sec, clamp DISabled)
cpu0: PKG Limit #2: ENabled (105.000000 Watts, 0.002441* sec, clamp DISabled)
cpu0: MSR_PP0_POLICY: 0
cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: Cores Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_PP1_POLICY: 0
cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: GFX Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00641400 (100 C)
cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x884c0800 (24 C)
cpu0: MSR_IA32_THERM_STATUS: 0x884c0000 (24 C +/- 1)
cpu1: MSR_IA32_THERM_STATUS: 0x88510000 (19 C +/- 1)
cpu2: MSR_IA32_THERM_STATUS: 0x884e0000 (22 C +/- 1)
cpu3: MSR_IA32_THERM_STATUS: 0x88510000 (19 C +/- 1)
cpu4: MSR_PKGC3_IRTL: 0x00008842 (valid, 67584 ns)
cpu4: MSR_PKGC6_IRTL: 0x00008873 (valid, 117760 ns)
cpu4: MSR_PKGC7_IRTL: 0x00008891 (valid, 148480 ns)
The max efficiency frequency, a.k.a. Low Frequency Mode, is the frequency available at the
minimum package voltage. The TSC frequency is the base frequency of the processor -- this
should match the brand string in /proc/cpuinfo. This base frequency should be sustainable
on all CPUs indefinitely, given nominal power and cooling. The remaining rows show what
maximum turbo frequency is possible depending on the number of idle cores. Note that not
all information is available on all processors.

ADD COUNTER EXAMPLE
Here we limit turbostat to showing just the CPU number for cpu0 - cpu3. We add a counter
showing the 32-bit raw value of MSR 0x199 (MSR_IA32_PERF_CTL), labeling it with the column
header, "PRF_CTRL", and display it only once, afte the conclusion of a 0.1 second sleep.
sudo ./turbostat --quiet --cpu 0-3 --show CPU --add msr0x199,u32,raw,PRF_CTRL sleep .1
0.101604 sec
CPU PRF_CTRL
- 0x00000000
0 0x00000c00
1 0x00000800
2 0x00000a00
3 0x00000800

INPUT
For interval-mode, turbostat will immediately end the current interval when it sees a new-
line on standard input. turbostat will then start the next interval. Control-C will be
send a SIGINT to turbostat, which will immediately abort the program with no further pro-
cessing.

SIGNALS
SIGINT will interrupt interval-mode. The end-of-interval data will be collected and dis-
played before turbostat exits.

SIGUSR1 will end current interval, end-of-interval data will be collected and displayed
before turbostat starts a new interval.

NOTES
turbostat must be run as root. Alternatively, non-root users can be enabled to run turbo-
stat this way:

# setcap cap_sys_rawio=ep ./turbostat

# chmod +r /dev/cpu/*/msr

turbostat reads hardware counters, but doesn't write them. So it will not interfere with
the OS or other programs, including multiple invocations of itself.

turbostat may work poorly on Linux-2.6.20 through 2.6.29, as acpi-cpufreq periodically
cleared the APERF and MPERF MSRs in those kernels.

AVG_MHz = APERF_delta/measurement_interval. This is the actual number of elapsed cycles
divided by the entire sample interval -- including idle time. Note that this calculation
is resilient to systems lacking a non-stop TSC.

TSC_MHz = TSC_delta/measurement_interval. On a system with an invariant TSC, this value
will be constant and will closely match the base frequency value shown 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

Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval

Note that these calculations depend on TSC_delta, so they are not reliable during inter-
vals when TSC_MHz is not running at the base frequency.

Turbostat data collection is not atomic. Extremely short measurement intervals (much less
than 1 second), or system activity that prevents turbostat from being able to run on all
CPUS to quickly collect data, will result in inconsistent results.

The APERF, MPERF MSRs are defined to count non-halted cycles. Although it is not guaran-
teed by the architecture, turbostat assumes that they count at TSC rate, which is true on
all processors tested to date.

REFERENCES
Volume 3B: System Programming Guide" http://www.intel.com/products/processor/manuals/

FILES
/dev/cpu/*/msr