WebbAlso it can contain any sort key (s). By default, every sort keys not specified in -F will be appended automatically. If the keys starts with a prefix '+', then it will append the specified field (s) to the default field order. For example: perf report -F +period,sample. -p, --parent= A regex filter to identify parent. Webb13 juni 2024 · 2. I don't know why user is not able to collect perf stat for a service (nginx process which has been started by sudo). As you can see the kernel and perf versions …
Simpleperf - googlesource.com
Webb27 apr. 2024 · When you run the perf utility with a command, one of the output lines you get looks like:. 2.088031 task-clock (msec) # 0.700 CPUs utilized and if you use perf stat --all-cpus --no-aggr, you get one of these lines per CPU core, e.g.:. CPU0 38.518960 cpu-clock (msec) # 0.528 CPUs utilized CPU1 38.564135 cpu-clock (msec) # 0.529 CPUs utilized … WebbSimpleperf has three main commands: stat, record and report. The stat command gives a summary of how many events have happened in the profiled processes in a time period. … melancholytron
Introduction of simpleperf - Google Open Source
Webb4 mars 2024 · Simpleperf 具有三个主要的功能:stat,record 和 report。 Stat 命令给出了在一段时间内被剖析的进程中发生了多少事件的摘要。以下是它的工作原理: 给定用户选项,simpleperf 通过对 linux 内核执行系统调用来启用剖析。 Linux 内核在调度到被剖析进程时启用计数器。 Simpleperf A toolset that lets you implement parts of your app in native code, using languages such as C and C++. Updated Aug 17, 2024 Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. Webb17 mars 2024 · perf stat -e cycles:uk dd if=/dev/zero of=/dev/null count=100000 Modifiers . Events can optionally have a modifier by appending a colon and one or more modifiers. Modifiers allow the user to restrict when events are counted. To measure a PMU event and pass modifiers: perf stat -e instructions:u dd if=/dev/zero of=/dev/null count=100000 melancholy ukulele chords