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1 .TH TURBOSTAT 8
2 .SH NAME
3 turbostat \- Report processor frequency and idle statistics
4 .SH SYNOPSIS
5 .ft B
6 .B turbostat
7 .RB [ Options ]
8 .RB command
9 .br
10 .B turbostat
11 .RB [ Options ]
12 .RB [ "\--interval seconds" ]
13 .SH DESCRIPTION
14 \fBturbostat \fP reports processor topology, frequency,
15 idle power-state statistics, temperature and power on X86 processors.
16 There are two ways to invoke turbostat.
17 The first method is to supply a
18 \fBcommand\fP, which is forked and statistics are printed
19 in one-shot upon its completion.
20 The second method is to omit the command,
21 and turbostat displays statistics every 5 seconds interval.
22 The 5-second interval can be changed using the --interval option.
23 .PP
24 Some information is not available on older processors.
25 .SS Options
26 Options can be specified with a single or double '-', and only as much of the option
27 name as necessary to disambiguate it from others is necessary. Note that options are case-sensitive.
28 .PP
29 \fB--add attributes\fP add column with counter having specified 'attributes'. The 'location' attribute is required, all others are optional.
30 .nf
31 location: {\fBmsrDDD\fP | \fBmsr0xXXX\fP | \fB/sys/path...\fP}
32 msrDDD is a decimal offset, eg. msr16
33 msr0xXXX is a hex offset, eg. msr0x10
34 /sys/path... is an absolute path to a sysfs attribute
36 scope: {\fBcpu\fP | \fBcore\fP | \fBpackage\fP}
37 sample and print the counter for every cpu, core, or package.
38 default: cpu
40 size: {\fBu32\fP | \fBu64\fP }
41 MSRs are read as 64-bits, u32 truncates the displayed value to 32-bits.
42 default: u64
44 format: {\fBraw\fP | \fBdelta\fP | \fBpercent\fP}
45 'raw' shows the MSR contents in hex.
46 'delta' shows the difference in values during the measurement interval.
47 'percent' shows the delta as a percentage of the cycles elapsed.
48 default: delta
50 name: "name_string"
51 Any string that does not match a key-word above is used
52 as the column header.
53 .fi
54 .PP
55 \fB--cpu cpu-set\fP 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
56 .PP
57 \fB--hide column\fP 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 statistics columns as a group.
58 .PP
59 \fB--enable column\fP 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".
60 The column name "all" can be used to enable all disabled-by-default built-in counters.
61 .PP
62 \fB--show column\fP 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 statistics columns as a group.
63 .PP
64 \fB--Dump\fP displays the raw counter values.
65 .PP
66 \fB--quiet\fP Do not decode and print the system configuration header information.
67 .PP
68 \fB--interval seconds\fP overrides the default 5.0 second measurement interval.
69 .PP
70 \fB--num_iterations num\fP number of the measurement iterations.
71 .PP
72 \fB--out output_file\fP turbostat output is written to the specified output_file.
73 The file is truncated if it already exists, and it is created if it does not exist.
74 .PP
75 \fB--help\fP displays usage for the most common parameters.
76 .PP
77 \fB--Joules\fP displays energy in Joules, rather than dividing Joules by time to print power in Watts.
78 .PP
79 \fB--list\fP display column header names available for use by --show and --hide, then exit.
80 .PP
81 \fB--Summary\fP limits output to a 1-line System Summary for each interval.
82 .PP
83 \fB--TCC temperature\fP 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.
84 .PP
85 \fB--version\fP displays the version.
86 .PP
87 The \fBcommand\fP parameter forks \fBcommand\fP, and upon its exit,
88 displays the statistics gathered since it was forked.
89 .PP
90 .SH ROW DESCRIPTIONS
91 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 system.
92 .SH COLUMN DESCRIPTIONS
93 .nf
94 \fBusec\fP 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.
95 \fBTime_Of_Day_Seconds\fP 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.
96 \fBCore\fP processor core number. Note that multiple CPUs per core indicate support for Intel(R) Hyper-Threading Technology (HT).
97 \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.
98 \fBPackage\fP processor package number -- not present on systems with a single processor package.
99 \fBAvg_MHz\fP number of cycles executed divided by time elapsed. Note that this includes idle-time when 0 instructions are executed.
100 \fBBusy%\fP percent of the measurement interval that the CPU executes instructions, aka. % of time in "C0" state.
101 \fBBzy_MHz\fP average clock rate while the CPU was not idle (ie. in "c0" state).
102 \fBTSC_MHz\fP average MHz that the TSC ran during the entire interval.
103 \fBIRQ\fP 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.
104 \fBSMI\fP 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.
105 \fBC1, C2, C3...\fP 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.
106 \fBC1%, C2%, C3%\fP 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.
107 \fBCPU%c1, CPU%c3, CPU%c6, CPU%c7\fP show the percentage residency in hardware core idle states. These numbers are from hardware residency counters.
108 \fBCoreTmp\fP Degrees Celsius reported by the per-core Digital Thermal Sensor.
109 \fBPkgTmp\fP Degrees Celsius reported by the per-package Package Thermal Monitor.
110 \fBGFX%rc6\fP 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.
111 \fBGFXMHz\fP 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.
112 \fBPkg%pc2, Pkg%pc3, Pkg%pc6, Pkg%pc7\fP percentage residency in hardware package idle states. These numbers are from hardware residency counters.
113 \fBPkgWatt\fP Watts consumed by the whole package.
114 \fBCorWatt\fP Watts consumed by the core part of the package.
115 \fBGFXWatt\fP Watts consumed by the Graphics part of the package -- available only on client processors.
116 \fBRAMWatt\fP Watts consumed by the DRAM DIMMS -- available only on server processors.
117 \fBPKG_%\fP 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.
118 \fBRAM_%\fP percent of the interval that RAPL throttling was active on DRAM.
119 .fi
120 .SH TOO MUCH INFORMATION EXAMPLE
121 By default, turbostat dumps all possible information -- a system configuration header, followed by columns for all counters.
122 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.
123 .PP
124 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.
125 .PP
126 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:
127 .nf
128 sudo ./turbostat --show sysfs --quiet sleep 10
129 10.003837 sec
130 C1 C1E C3 C6 C7s C1% C1E% C3% C6% C7s%
131 4 21 2 2 459 0.14 0.82 0.00 0.00 98.93
132 1 17 2 2 130 0.00 0.02 0.00 0.00 99.80
133 0 0 0 0 31 0.00 0.00 0.00 0.00 99.95
134 2 1 0 0 52 1.14 6.49 0.00 0.00 92.21
135 1 2 0 0 52 0.00 0.08 0.00 0.00 99.86
136 0 0 0 0 71 0.00 0.00 0.00 0.00 99.89
137 0 0 0 0 25 0.00 0.00 0.00 0.00 99.96
138 0 0 0 0 74 0.00 0.00 0.00 0.00 99.94
139 0 1 0 0 24 0.00 0.00 0.00 0.00 99.84
140 .fi
141 .PP
142 .SH ONE SHOT COMMAND EXAMPLE
143 If turbostat is invoked with a command, it will fork that command
144 and output the statistics gathered after the command exits.
145 In this case, turbostat output goes to stderr, by default.
146 Output can instead be saved to a file using the --out option.
147 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.
149 .nf
150 [root@hsw]# ./turbostat -o ts.out sleep 10
151 [root@hsw]#
152 .fi
154 .SH PERIODIC INTERVAL EXAMPLE
155 Without a command to fork, turbostat displays statistics ever 5 seconds.
156 Periodic output goes to stdout, by default, unless --out is used to specify an output file.
157 The 5-second interval can be changed with the "-i sec" option.
158 .nf
159 sudo ./turbostat --quiet --hide sysfs,IRQ,SMI,CoreTmp,PkgTmp,GFX%rc6,GFXMHz,PkgWatt,CorWatt,GFXWatt
160 Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c1 CPU%c3 CPU%c6 CPU%c7
161 - - 488 12.52 3900 3498 12.50 0.00 0.00 74.98
162 0 0 5 0.13 3900 3498 99.87 0.00 0.00 0.00
163 0 4 3897 99.99 3900 3498 0.01
164 1 1 0 0.00 3856 3498 0.01 0.00 0.00 99.98
165 1 5 0 0.00 3861 3498 0.01
166 2 2 1 0.02 3889 3498 0.03 0.00 0.00 99.95
167 2 6 0 0.00 3863 3498 0.05
168 3 3 0 0.01 3869 3498 0.02 0.00 0.00 99.97
169 3 7 0 0.00 3878 3498 0.03
170 Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz CPU%c1 CPU%c3 CPU%c6 CPU%c7
171 - - 491 12.59 3900 3498 12.42 0.00 0.00 74.99
172 0 0 27 0.69 3900 3498 99.31 0.00 0.00 0.00
173 0 4 3898 99.99 3900 3498 0.01
174 1 1 0 0.00 3883 3498 0.01 0.00 0.00 99.99
175 1 5 0 0.00 3898 3498 0.01
176 2 2 0 0.01 3889 3498 0.02 0.00 0.00 99.98
177 2 6 0 0.00 3889 3498 0.02
178 3 3 0 0.00 3856 3498 0.01 0.00 0.00 99.99
179 3 7 0 0.00 3897 3498 0.01
180 .fi
181 This example also shows the use of the --hide option to skip columns that are not wanted.
182 Note that cpu4 in this example is 99.99% busy, while the other CPUs are all under 1% busy.
183 Notice that cpu4's HT sibling is cpu0, which is under 1% busy, but can get into CPU%c1 only,
184 because its cpu4's activity on shared hardware keeps it from entering a deeper C-state.
186 .SH SYSTEM CONFIGURATION INFORMATION EXAMPLE
188 By default, turbostat always dumps system configuration information
189 before taking measurements. In the example above, "--quiet" is used
190 to suppress that output. Here is an example of the configuration information:
191 .nf
192 turbostat version 2017.02.15 - Len Brown <lenb@kernel.org>
193 CPUID(0): GenuineIntel 13 CPUID levels; family:model:stepping 0x6:3c:3 (6:60:3)
194 CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM TM
195 CPUID(6): APERF, TURBO, DTS, PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, EPB
196 cpu4: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST No-MWAIT PREFETCH TURBO)
197 CPUID(7): No-SGX
198 cpu4: MSR_MISC_PWR_MGMT: 0x00400000 (ENable-EIST_Coordination DISable-EPB DISable-OOB)
199 RAPL: 3121 sec. Joule Counter Range, at 84 Watts
200 cpu4: MSR_PLATFORM_INFO: 0x80838f3012300
201 8 * 100.0 = 800.0 MHz max efficiency frequency
202 35 * 100.0 = 3500.0 MHz base frequency
203 cpu4: MSR_IA32_POWER_CTL: 0x0004005d (C1E auto-promotion: DISabled)
204 cpu4: MSR_TURBO_RATIO_LIMIT: 0x25262727
205 37 * 100.0 = 3700.0 MHz max turbo 4 active cores
206 38 * 100.0 = 3800.0 MHz max turbo 3 active cores
207 39 * 100.0 = 3900.0 MHz max turbo 2 active cores
208 39 * 100.0 = 3900.0 MHz max turbo 1 active cores
209 cpu4: MSR_CONFIG_TDP_NOMINAL: 0x00000023 (base_ratio=35)
210 cpu4: MSR_CONFIG_TDP_LEVEL_1: 0x00000000 ()
211 cpu4: MSR_CONFIG_TDP_LEVEL_2: 0x00000000 ()
212 cpu4: MSR_CONFIG_TDP_CONTROL: 0x80000000 ( lock=1)
213 cpu4: MSR_TURBO_ACTIVATION_RATIO: 0x00000000 (MAX_NON_TURBO_RATIO=0 lock=0)
214 cpu4: MSR_PKG_CST_CONFIG_CONTROL: 0x1e000400 (UNdemote-C3, UNdemote-C1, demote-C3, demote-C1, UNlocked: pkg-cstate-limit=0: pc0)
215 cpu4: POLL: CPUIDLE CORE POLL IDLE
216 cpu4: C1: MWAIT 0x00
217 cpu4: C1E: MWAIT 0x01
218 cpu4: C3: MWAIT 0x10
219 cpu4: C6: MWAIT 0x20
220 cpu4: C7s: MWAIT 0x32
221 cpu4: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch-pair L1-Prefetch L1-IP-Prefetch)
222 cpu0: MSR_IA32_ENERGY_PERF_BIAS: 0x00000006 (balanced)
223 cpu0: MSR_CORE_PERF_LIMIT_REASONS, 0x31200000 (Active: ) (Logged: Transitions, MultiCoreTurbo, Amps, Auto-HWP, )
224 cpu0: MSR_GFX_PERF_LIMIT_REASONS, 0x00000000 (Active: ) (Logged: )
225 cpu0: MSR_RING_PERF_LIMIT_REASONS, 0x0d000000 (Active: ) (Logged: Amps, PkgPwrL1, PkgPwrL2, )
226 cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 Joules, 0.000977 sec.)
227 cpu0: MSR_PKG_POWER_INFO: 0x000002a0 (84 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
228 cpu0: MSR_PKG_POWER_LIMIT: 0x428348001a82a0 (UNlocked)
229 cpu0: PKG Limit #1: ENabled (84.000000 Watts, 8.000000 sec, clamp DISabled)
230 cpu0: PKG Limit #2: ENabled (105.000000 Watts, 0.002441* sec, clamp DISabled)
231 cpu0: MSR_PP0_POLICY: 0
232 cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked)
233 cpu0: Cores Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
234 cpu0: MSR_PP1_POLICY: 0
235 cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked)
236 cpu0: GFX Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
237 cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00641400 (100 C)
238 cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x884c0800 (24 C)
239 cpu0: MSR_IA32_THERM_STATUS: 0x884c0000 (24 C +/- 1)
240 cpu1: MSR_IA32_THERM_STATUS: 0x88510000 (19 C +/- 1)
241 cpu2: MSR_IA32_THERM_STATUS: 0x884e0000 (22 C +/- 1)
242 cpu3: MSR_IA32_THERM_STATUS: 0x88510000 (19 C +/- 1)
243 cpu4: MSR_PKGC3_IRTL: 0x00008842 (valid, 67584 ns)
244 cpu4: MSR_PKGC6_IRTL: 0x00008873 (valid, 117760 ns)
245 cpu4: MSR_PKGC7_IRTL: 0x00008891 (valid, 148480 ns)
246 .fi
247 The \fBmax efficiency\fP frequency, a.k.a. Low Frequency Mode, is the frequency
248 available at the minimum package voltage. The \fBTSC frequency\fP is the base
249 frequency of the processor -- this should match the brand string
250 in /proc/cpuinfo. This base frequency
251 should be sustainable on all CPUs indefinitely, given nominal power and cooling.
252 The remaining rows show what maximum turbo frequency is possible
253 depending on the number of idle cores. Note that not all information is
254 available on all processors.
255 .SH ADD COUNTER EXAMPLE
256 Here we limit turbostat to showing just the CPU number for cpu0 - cpu3.
257 We add a counter showing the 32-bit raw value of MSR 0x199 (MSR_IA32_PERF_CTL),
258 labeling it with the column header, "PRF_CTRL", and display it only once,
259 afte the conclusion of a 0.1 second sleep.
260 .nf
261 sudo ./turbostat --quiet --cpu 0-3 --show CPU --add msr0x199,u32,raw,PRF_CTRL sleep .1
262 0.101604 sec
263 CPU PRF_CTRL
264 - 0x00000000
265 0 0x00000c00
266 1 0x00000800
267 2 0x00000a00
268 3 0x00000800
270 .fi
272 .SH INPUT
274 For interval-mode, turbostat will immediately end the current interval
275 when it sees a newline on standard input.
276 turbostat will then start the next interval.
277 Control-C will be send a SIGINT to turbostat,
278 which will immediately abort the program with no further processing.
279 .SH SIGNALS
281 SIGINT will interrupt interval-mode.
282 The end-of-interval data will be collected and displayed before turbostat exits.
284 SIGUSR1 will end current interval,
285 end-of-interval data will be collected and displayed before turbostat
286 starts a new interval.
287 .SH NOTES
289 .B "turbostat "
290 must be run as root.
291 Alternatively, non-root users can be enabled to run turbostat this way:
293 # setcap cap_sys_rawio=ep ./turbostat
295 # chmod +r /dev/cpu/*/msr
297 .B "turbostat "
298 reads hardware counters, but doesn't write them.
299 So it will not interfere with the OS or other programs, including
300 multiple invocations of itself.
302 \fBturbostat \fP
303 may work poorly on Linux-2.6.20 through 2.6.29,
304 as \fBacpi-cpufreq \fPperiodically cleared the APERF and MPERF MSRs
305 in those kernels.
307 AVG_MHz = APERF_delta/measurement_interval. This is the actual
308 number of elapsed cycles divided by the entire sample interval --
309 including idle time. Note that this calculation is resilient
310 to systems lacking a non-stop TSC.
312 TSC_MHz = TSC_delta/measurement_interval.
313 On a system with an invariant TSC, this value will be constant
314 and will closely match the base frequency value shown
315 in the brand string in /proc/cpuinfo. On a system where
316 the TSC stops in idle, TSC_MHz will drop
317 below the processor's base frequency.
319 Busy% = MPERF_delta/TSC_delta
321 Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval
323 Note that these calculations depend on TSC_delta, so they
324 are not reliable during intervals when TSC_MHz is not running at the base frequency.
326 Turbostat data collection is not atomic.
327 Extremely short measurement intervals (much less than 1 second),
328 or system activity that prevents turbostat from being able
329 to run on all CPUS to quickly collect data, will result in
330 inconsistent results.
332 The APERF, MPERF MSRs are defined to count non-halted cycles.
333 Although it is not guaranteed by the architecture, turbostat assumes
334 that they count at TSC rate, which is true on all processors tested to date.
336 .SH REFERENCES
337 Volume 3B: System Programming Guide"
338 https://www.intel.com/products/processor/manuals/
340 .SH FILES
341 .ta
342 .nf
343 /dev/cpu/*/msr
344 .fi
346 .SH "SEE ALSO"
347 msr(4), vmstat(8)
348 .PP
349 .SH AUTHOR
350 .nf
351 Written by Len Brown <len.brown@intel.com>