workingwhe.blogg.se - Cpufreq performance ubuntu 18.04

#CPUFREQ PERFORMANCE UBUNTU 18.04 HOW TO#
#CPUFREQ PERFORMANCE UBUNTU 18.04 INSTALL#

perf record -e cpu-clock -a -g - sleep 3 Ĭheck the man page for the explanation of the options used. perf list List of pre-defined events (to be used in -e):Ĭpu-migrations OR migrations To list list all pre-defined events, run perf list. The basic syntax of using record command is stated on man perf-record. To run a command and record its profile into perf.data, use the record sub-command. To learn more on this, check man perf-top. To display a performance counter profile in real time, use top sub-command perf top Samples: 71 of event 'cpu-clock', Event count (approx.): 14105457Ħ.65% e1000_alloc_rx_buffersĤ.07% kallsyms_expand_nstprop.1ģ.13% _softirqentry_text_startģ.10% _raw_spin_unlock_irqrestore

#CPUFREQ PERFORMANCE UBUNTU 18.04 HOW TO#

Performance counter stats for 'ls -ld /etc/':Ģ.485653 task-clock (msec) # 0.649 CPUs utilizedįor a further insight on how to use stat sub-command, check man perf-stat. To run a command and gather performance statistics, you would run perf as shown below perf stat ls -ld /etc/ drwxr-xr-x 87 root root 4096 Feb 21 18:10 /etc/ Next, let us go over a few example usage of the perf command To obtain help about a specific sub-command, just execute perf help SUB-COMMAND To obtain a comprehensive list of sub-commands that can be used with perf command, pass the -help option to perf. The basic synopsis of the perf command is perf COMMAND

list: displays the symbolic event types which can be selected in the various perf commands with the -e option.

report: It reads perf.data to display the performance counter profile information recorded via perf record sub-command.

The gathered data is saved into perf.data without displaying anything.

record: runs a command and gathers a performance counter profile from it.

top: generates and displays a performance counter profile in real time.

stat: runs a command and gathers performance counter statistics from it.

There are quite a number of sub-commands that can be used with perf command. Once the installation is done, you should be able to have perf utility in your PATH.

#CPUFREQ PERFORMANCE UBUNTU 18.04 INSTALL#

Apt install linux-tools-$(uname -r) linux-tools-generic