Manual: turbostat
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 procesâ
sors. There are two ways to invoke turbostat. The first method is to supply a command, which is forked and statisâ
tics are printed in one-shot upon its completion. 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 disamâ
biguate it from others is necessary. Note that options are case-sensitive.
--add attributes add column with counter having specified 'attributes'. The 'location' attribute is required, all
others are optional.
location: {msrDDD | msr0xXXX | /sys/path... | perf//}
msrDDD is a decimal offset, eg. msr16
msr0xXXX is a hex offset, eg. msr0x10
/sys/path... is an absolute path to a sysfs attribute
is a perf device from /sys/bus/event_source/devices/ eg. cstate_core
On Intel hybrid platforms, instead of one "cpu" perf device there are two, "cpu_core" and "cpu_atom" devices for P and E cores respectively.
Turbostat, in this case, allow user to use "cpu" device and will automatically detect the type of a CPU and translate it to "cpu_core" and "cpu_atom" accordingly.
For a complete example see "ADD PERF COUNTER EXAMPLE #2 (using virtual "cpu" device)".
is a perf event for given device from /sys/bus/event_source/devices//events/ eg. c1-residency
perf/cstate_core/c1-residency would then use /sys/bus/event_source/devices/cstate_core/events/c1-residency
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 | average}
'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.
'average' similar to raw, but also averaged for node/package summaries (or when using -S).
default: delta
name: "name_string"
Any string that does not match a key-word above is used
as the column header.
--add pmt,[attr_name=attr_value, ...] add column with a PMT (Intel Platform Monitoring Technology) counter in a simiâ
lar way to --add option above, but require PMT metadata to be supplied to correctly read and display the counter. The
metadata can be found in the Intel PMT XML files, hosted at https://github.com/intel/Intel-PMT. For a complete examâ
ple see "ADD PMT COUNTER EXAMPLE".
name="name_string"
For column header.
type={raw}
'raw' shows the counter contents in hex.
default: raw
format={raw | delta}
'raw' shows the counter contents in hex.
'delta' shows the difference in values during the measurement interval.
default: raw
domain={cpu%u | core%u | package%u}
'cpu' per cpu/thread counter.
'core' per core counter.
'package' per package counter.
'%u' denotes id of the domain that the counter is associated with. For example core4 would mean that the counter is associated with core number 4.
offset=%u
'%u' offset within the PMT MMIO region.
lsb=%u
'%u' least significant bit within the 64 bit value read from 'offset'. Together with 'msb', used to form a read mask.
msb=%u
'%u' most significant bit within the 64 bit value read from 'offset'. Together with 'lsb', used to form a read mask.
guid=%x
'%x' hex identifier of the PMT MMIO region.
--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.
--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.
--show CATEGORY --hide CATEGORY Show and hide also accept a comma-separated-list of CATEGORIES of columns: "all",
"topology", "idle", "frequency", "power", "cpuidle", "hwidle", "swidle", "cache", "llc", "other". "idle" (enabled by
default), includes "hwidle" and "pct_idle". "cpuidle" (default disabled) includes cpuidle software invocation counâ
ters. "swidle" includes "cpuidle" plus "pct_idle". "hwidle" includes only hardware based idle residency counters.
Older versions of turbostat used the term "sysfs" for what is now "swidle".
--Dump displays the raw counter values.
--quiet Do not decode and print the system configuration header information.
--no-msr Disable all the uses of the MSR driver.
--no-perf Disable all the uses of the perf API.
--force Force turbostat to run on an unsupported platform (minimal defaults).
--interval seconds overrides the default 5.0 second measurement interval.
--num_iterations num number of the measurement iterations.
--header_iterations num print header every num iterations.
--out output_file turbostat output is written to the specified output_file. The file is truncated if it already exâ
ists, 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 sumâ
mary 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 system.
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 snapshot the procfs/sysfs and 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 collecâ
tion of counters on the last CPU.
Core processor core number. Note that multiple CPUs per core indicate support for Intel(R) Hyper-Threading Technolâ
ogy (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.
LLCMRPS Last Level Cache Millions of References Per Second. For CPUs with an L3 LLC, this is the number of referâ
ences that CPU made to the L3 (and the number of misses that CPU made to it's L2). For CPUs with an L2 LLC, this is
the number of references to the L2 (and the number of misses to the CPU's L1). The system summary row shows the sum
for all CPUs. In both cases, the value displayed is the actual value divided by 1,000,000. If this value is large,
then the LLC%hit column is significant. If this value is small, then the LLC%hit column is not significant.
LLC%hit Last Level Cache Hit Rate %. Hit Rate Percent = 100.0 * Hits/References. The system summary row shows the
weighted average for all CPUs (100.0 * Sum_Hits/Sum_References).
L2MRPS Level-2 Cache Millions of References Per Second. For CPUs with an L2 LLC, this is the same as LLC references.
The system summary row shows the sum for all CPUs. In both cases, the value displayed is the actual value divided by
1,000,000. If this value is large, then the L2%hit column is significant. If this value is small, then the L2%hit
column is not significant.
L2%hit Level-2 Cache Hit Rate %. Hit Rate Percent = 100.0 * Hits/References. The system summary row shows the
weighted average for all CPUs (100.0 * (Sum_Hits)/Sum_References).
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*/cpuiâ
dle/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. These counters are in the "cpuidle"
group, which is disabled, by default.
C1+, C2+, C3+... The idle governor idle state misprediction statistics. Indicates the number times Linux requested
the C1, C2, C3 idle state during the measurement interval, but should have requested a deeper idle state (if it exâ
ists and enabled). These statistics come from the /sys/devices/system/cpu/cpu*/cpuidle/state*/below file. These
counters are in the "cpuidle" group, which is disabled, by default.
C1-, C2-, C3-... The idle governor idle state misprediction statistics. Indicates the number times Linux requested
the C1, C2, C3 idle state during the measurement interval, but should have requested a shallower idle state (if it
exists and enabled). These statistics come from the /sys/devices/system/cpu/cpu*/cpuidle/state*/above file. These
counters are in the "cpuidle" group, which is disabled, by default.
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. These counters are in the "pct_idle" group, which is enabled by default.
CPU%c1, CPU%c3, CPU%c6, CPU%c7 show the percentage residency in hardware core idle states. These numbers are from
hardware residency counters and are in the "hwidle" group, which is enabled, by default.
CoreTmp Degrees Celsius reported by the per-core Digital Thermal Sensor.
PkgTmp Degrees Celsius reported by the per-package Package Thermal Monitor.
CoreThr Core Thermal Throttling events during the measurement interval. Note that events since boot can be find in
/sys/devices/system/cpu/cpu*/thermal_throttle/*
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 or /sys/class/drm/card0/gt/gt0/rc6_residency_ms or
/sys/class/drm/card0/device/tile0/gtN/gtidle/idle_residency_ms depending on the graphics driver being used.
GFXMHz Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphâ
ics/fb0/device/drm/card0/gt_cur_freq_mhz or /sys/class/drm/card0/gt_cur_freq_mhz or
/sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/cur_freq depending on the
graphics driver being used.
GFXAMHz Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphâ
ics/fb0/device/drm/card0/gt_act_freq_mhz or /sys/class/drm/card0/gt_act_freq_mhz or
/sys/class/drm/card0/gt/gt0/rps_act_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/act_freq depending on the
graphics driver being used.
SAM%mc6 The percentage of time the SA Media is in the "module C6" state, mc6, during the measurement interval. From
/sys/class/drm/card0/gt/gt1/rc6_residency_ms or /sys/class/drm/card0/device/tile0/gtN/gtidle/idle_residency_ms deâ
pending on the graphics driver being used.
SAMMHz Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From
/sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/cur_freq depending on the
graphics driver being used.
SAMAMHz Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From
/sys/class/drm/card0/gt/gt1/rps_act_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/act_freq depending on the
graphics driver being used.
Totl%C0 Weighted percentage of time that CPUs are busy. If N CPUs are busy during an interval, the percentage is N *
100%.
Any%C0 Percentage of time that at least one CPU is busy.
GFX%C0 Percentage of time that at least one GFX compute engine is busy.
CPUGFX% Percentage of time that at least one CPU is busy at the same time as at least one Graphics compute engine is
busy.
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.
SysWatt Watts consumed by the whole platform (RAPL PSYS).
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 meanâ
ing of this field is model specific. For example, some hardware increments this counter when RAPL responds to therâ
mal 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.
UncMHz per-package uncore MHz, instantaneous sample.
UMHz1.0 per-package uncore MHz for pm_domain=1 and fabric_cluster=0, instantaneous sample. System summary is the avâ
erage of all packages. Intel Granite Rapids systems use pm_domains 0-2 for CPUs, and 3-4 for IO, with cluster always
0. For the "--show" and "--hide" options, use "UncMHz" to operate on all UMHz*.* as a group.
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. Usually, the CATEâ
GORY names above are used to refer to groups of counters. Also, for convenience, the special string "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 statistics gathered after the comâ
mand 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 --show CPU,frequency
Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c7 UncMhz
- - 524 12.48 4198 3096 74.53 3800
0 0 4 0.09 4081 3096 98.88 3800
0 4 1 0.02 4063 3096
1 1 2 0.06 4063 3096 99.60
1 5 2 0.05 4070 3096
2 2 4178 99.52 4199 3096 0.00
2 6 3 0.08 4159 3096
3 3 1 0.04 4046 3096 99.66
3 7 0 0.01 3989 3096
Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c7 UncMhz
- - 525 12.52 4198 3096 74.54 3800
0 0 4 0.10 4051 3096 99.49 3800
0 4 2 0.04 3993 3096
1 1 3 0.07 4054 3096 99.56
1 5 4 0.10 4018 3096
2 2 4178 99.51 4199 3096 0.00
2 6 4 0.09 4143 3096
3 3 2 0.06 4026 3096 99.10
3 7 7 0.17 4074 3096
This example also shows the use of the --show option to show only the desired columns.
SYSTEM CONFIGURATION INFORMATION EXAMPLE
By default, turbostat always dumps system configuration information before taking measurements. In the example
above, "--quiet" is used to suppress that output. Here is an example of the configuration information:
turbostat version 2022.04.16 - Len Brown
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.18.0-rc6-00001-ge6891250e3b5 ...
CPUID(0): GenuineIntel 0x16 CPUID levels
CPUID(1): family:model:stepping 0x6:9e:9 (6:158:9) microcode 0xea
CPUID(0x80000000): max_extended_levels: 0x80000008
CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM HT TM
CPUID(6): APERF, TURBO, DTS, PTM, HWP, HWPnotify, HWPwindow, HWPepp, No-HWPpkg, EPB
cpu7: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT PREFETCH TURBO)
CPUID(7): SGX
cpu7: MSR_IA32_FEATURE_CONTROL: 0x00000005 (Locked )
CPUID(0x15): eax_crystal: 2 ebx_tsc: 258 ecx_crystal_hz: 0
TSC: 3096 MHz (24000000 Hz * 258 / 2 / 1000000)
CPUID(0x16): base_mhz: 3100 max_mhz: 4200 bus_mhz: 100
cpu7: MSR_MISC_PWR_MGMT: 0x00401cc0 (ENable-EIST_Coordination DISable-EPB DISable-OOB)
RAPL: 5825 sec. Joule Counter Range, at 45 Watts
cpu7: MSR_PLATFORM_INFO: 0x80839f1011f00
8 * 100.0 = 800.0 MHz max efficiency frequency
31 * 100.0 = 3100.0 MHz base frequency
cpu7: MSR_IA32_POWER_CTL: 0x002c005d (C1E auto-promotion: DISabled)
cpu7: MSR_TURBO_RATIO_LIMIT: 0x2728292a
39 * 100.0 = 3900.0 MHz max turbo 4 active cores
40 * 100.0 = 4000.0 MHz max turbo 3 active cores
41 * 100.0 = 4100.0 MHz max turbo 2 active cores
42 * 100.0 = 4200.0 MHz max turbo 1 active cores
cpu7: MSR_CONFIG_TDP_NOMINAL: 0x0000001f (base_ratio=31)
cpu7: MSR_CONFIG_TDP_LEVEL_1: 0x00000000 ()
cpu7: MSR_CONFIG_TDP_LEVEL_2: 0x00000000 ()
cpu7: MSR_CONFIG_TDP_CONTROL: 0x80000000 ( lock=1)
cpu7: MSR_TURBO_ACTIVATION_RATIO: 0x00000000 (MAX_NON_TURBO_RATIO=0 lock=0)
cpu7: MSR_PKG_CST_CONFIG_CONTROL: 0x1e008008 (UNdemote-C3, UNdemote-C1, demote-C3, demote-C1, locked, pkg-cstate-limit=8 (unlimited))
Uncore Frequency pkg0 die0: 800 - 3900 MHz (800 - 3900 MHz)
/dev/cpu_dma_latency: 2000000000 usec (default)
current_driver: intel_idle
current_governor: menu
current_governor_ro: menu
cpu7: POLL: CPUIDLE CORE POLL IDLE
cpu7: C1: MWAIT 0x00
cpu7: C1E: MWAIT 0x01
cpu7: C3: MWAIT 0x10
cpu7: C6: MWAIT 0x20
cpu7: C7s: MWAIT 0x33
cpu7: C8: MWAIT 0x40
cpu7: C9: MWAIT 0x50
cpu7: C10: MWAIT 0x60
cpu7: cpufreq driver: intel_pstate
cpu7: cpufreq governor: performance
cpufreq intel_pstate no_turbo: 0
cpu7: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch-pair L1-Prefetch L1-IP-Prefetch)
cpu0: MSR_PM_ENABLE: 0x00000001 (HWP)
cpu0: MSR_HWP_CAPABILITIES: 0x01101f53 (high 83 guar 31 eff 16 low 1)
cpu0: MSR_HWP_REQUEST: 0x00005353 (min 83 max 83 des 0 epp 0x0 window 0x0 pkg 0x0)
cpu0: MSR_HWP_INTERRUPT: 0x00000001 (EN_Guaranteed_Perf_Change, Dis_Excursion_Min)
cpu0: MSR_HWP_STATUS: 0x00000004 (No-Guaranteed_Perf_Change, No-Excursion_Min)
cpu0: EPB: 6 (balanced)
cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 Joules, 0.000977 sec.)
cpu0: MSR_PKG_POWER_INFO: 0x00000168 (45 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu0: MSR_PKG_POWER_LIMIT: 0x42820800218208 (UNlocked)
cpu0: PKG Limit #1: ENabled (65.000 Watts, 64.000000 sec, clamp ENabled)
cpu0: PKG Limit #2: ENabled (65.000 Watts, 0.002441* sec, clamp DISabled)
cpu0: MSR_VR_CURRENT_CONFIG: 0x00000000
cpu0: PKG Limit #4: 0.000000 Watts (UNlocked)
cpu0: MSR_DRAM_POWER_LIMIT: 0x5400de00000000 (UNlocked)
cpu0: DRAM Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_PP0_POLICY: 0
cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: Cores Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_PP1_POLICY: 0
cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: GFX Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00640000 (100 C) (100 default - 0 offset)
cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x88200800 (68 C)
cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C)
cpu7: MSR_PKGC3_IRTL: 0x0000884e (valid, 79872 ns)
cpu7: MSR_PKGC6_IRTL: 0x00008876 (valid, 120832 ns)
cpu7: MSR_PKGC7_IRTL: 0x00008894 (valid, 151552 ns)
cpu7: MSR_PKGC8_IRTL: 0x000088fa (valid, 256000 ns)
cpu7: MSR_PKGC9_IRTL: 0x0000894c (valid, 339968 ns)
cpu7: MSR_PKGC10_IRTL: 0x00008bf2 (valid, 1034240 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 informaâ
tion 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, afâ
ter 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
ADD PERF COUNTER EXAMPLE
Here we limit turbostat to showing just the CPU number for cpu0 - cpu3. We add a counter showing time spent in C1
core cstate, labeling it with the column header, "pCPU%c1", and display it only once, after the conclusion of 0.1
second sleep. We also show CPU%c1 built-in counter that should show similar values.
sudo ./turbostat --quiet --cpu 0-3 --show CPU,CPU%c1 --add perf/cstate_core/c1-residency,cpu,delta,percent,pCPU%c1 sleep .1
0.102448 sec
CPU pCPU%c1 CPU%c1
- 34.89 34.89
0 45.99 45.99
1 45.94 45.94
2 23.83 23.83
3 23.84 23.84
ADD PERF COUNTER EXAMPLE #2 (using virtual cpu device)
Here we run on hybrid, Meteor Lake platform. We limit turbostat to show output for just cpu0 (pcore) and cpu4
(ecore). We add a counter showing number of L3 cache misses, using virtual "cpu" device, labeling it with the column
header, "VCMISS". We add a counter showing number of L3 cache misses, using virtual "cpu_core" device, labeling it
with the column header, "PCMISS". This will fail on ecore cpu4. We add a counter showing number of L3 cache misses,
using virtual "cpu_atom" device, labeling it with the column header, "ECMISS". This will fail on pcore cpu0. We disâ
play it only once, after the conclusion of 0.1 second sleep.
sudo ./turbostat --quiet --cpu 0,4 --show CPU --add perf/cpu/cache-misses,cpu,delta,VCMISS --add perf/cpu_core/cache-misses,cpu,delta,PCMISS --add perf/cpu_atom/cache-misses,cpu,delta,ECMISS sleep 5
turbostat: added_perf_counters_init_: perf/cpu_atom/cache-misses: failed to open counter on cpu0
turbostat: added_perf_counters_init_: perf/cpu_core/cache-misses: failed to open counter on cpu4
5.001207 sec
CPU ECMISS PCMISS VCMISS
- 41586506 46291219 87877749
4 83173012 0 83173040
0 0 92582439 92582458
ADD PMT COUNTER EXAMPLE
Here we limit turbostat to showing just the CPU number 0. We add two counters, showing crystal clock count and the
DC6 residency. All the parameters passed are based on the metadata found in the PMT XML files.
For the crystal clock count, we label it with the column header, "XTAL", we set the type to 'raw', to read the number
of clock ticks in hex, we set the format to 'delta', to display the difference in ticks during the measurement interâ
val, we set the domain to 'package0', to collect it and associate it with the whole package number 0, we set the offâ
set to '0', which is a offset of the counter within the PMT MMIO region, we set the lsb and msb to cover all 64 bits
of the read 64 bit value, and finally we set the guid to '0x1a067102', that identifies the PMT MMIO region to which
the 'offset' is applied to read the counter value.
For the DC6 residency counter, we label it with the column header, "Die%c6", we set the type to 'txtal_time', to obâ
tain the percent residency value we set the format to 'delta', to display the difference in ticks during the measureâ
ment interval, we set the domain to 'package0', to collect it and associate it with the whole package number 0, we
set the offset to '0', which is a offset of the counter within the PMT MMIO region, we set the lsb and msb to cover
all 64 bits of the read 64 bit value, and finally we set the guid to '0x1a067102', that identifies the PMT MMIO reâ
gion to which the 'offset' is applied to read the counter value.
sudo ./turbostat --quiet --cpu 0 --show CPU --add pmt,name=XTAL,type=raw,format=delta,domain=package0,offset=0,lsb=0,msb=63,guid=0x1a067102 --add pmt,name=Die%c6,type=txtal_time,format=delta,domain=package0,offset=120,lsb=0,msb=63,guid=0x1a067102
0.104352 sec
CPU XTAL Die%c6
- 0x0000006d4d957ca7 0.00
0 0x0000006d4d957ca7 0.00
0.102448 sec
INPUT
For interval-mode, turbostat will immediately end the current interval when it sees a newline 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 processing.
SIGNALS
SIGINT will interrupt interval-mode. The end-of-interval data will be collected and displayed before turbostat exâ
its.
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 turbostat this way:
# setcap cap_sys_admin,cap_sys_rawio,cap_sys_nice=+ep path/to/turbostat
# chmod +r /dev/cpu/*/msr
# chmod +r /dev/cpu_dma_latency
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 intervals when TSC_MHz is not runâ
ning 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 inconsisâ
tent results.
The APERF, MPERF MSRs are defined to count non-halted cycles. Although it is not guaranteed 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" https://www.intel.com/products/processor/manuals/
RUN THE LATEST VERSION
If turbostat complains that it doesn't recognize your processor, please try the latest version.
The latest version of turbostat does not require the latest version of the Linux kernel. However, some features,
such as perf(1) counters, do require kernel support.
The latest turbostat release is available in the upstream Linux Kernel source tree. eg. "git pull https://git.kerâ
nel.org/pub/scm/linux/kernel/git/torvalds/linux.git" and run make in tools/power/x86/turbostat/.
n.b. "make install" will update your system manually, but a distro update may subsequently downgrade your turbostat
to an older version. For this reason, manually installing to /usr/local/bin may be what you want.
Note that turbostat/Makefile has a "make snapshot" target, which will create a tar file that can build without a loâ
cal kernel source tree.
If the upstream version isn't new enough, the development tree can be found here: "git pull https://git.kerâ
nel.org/pub/scm/linux/kernel/git/lenb/linux.git turbostat"
If the development tree doesn't work, please contact the author via chat, or via email with the word "turbostat" on
the Subject line.
An old turbostat binary may run on unknown hardware by using "--force", but results are unsupported.
FILES
/sys/bus/event_source/devices/
/dev/cpu/*/msr
/sys/class/intel_pmt/
/sys/devices/system/cpu/
SEE ALSO
perf(1), msr(4), vmstat(8)
AUTHOR
Written by Len Brown
TURBOSTAT(8)