What is perf top?
DESCRIPTION top This command generates and displays a performance counter profile in real time.
How do you Analyse data perf?
You must first collect the samples using perf record. This generates an output file called perf. data. That file can then be analyzed, possibly on another machine, using the perf report and perf annotate commands.
What is perf command in Linux?
The perf command is used as a primary interface to the Linux kernel performance monitoring capabilities and can record CPU performance counters and trace points.
What does perf script do?
‘perf script’ to see a detailed trace of the workload that was recorded. You can also run a set of pre-canned scripts that aggregate and summarize the raw trace data in various ways (the list of scripts is available via ‘perf script -l’).
What is perf stat?
perf-stat – Run a command and gather performance counter statistics.
What is perf script?
What is perf tool?
Perf is a profiler tool for Linux 2.6+ based systems that abstracts away CPU hardware differences in Linux performance measurements and presents a simple command line interface. It covers hardware level (CPU/PMU, Performance Monitoring Unit) features and software features (software counters, tracepoints) as well.
What is a perf file?
Perf consists of kernel code and an userspace tool. The tool records the data to an file which can be analyzed later. This report provides information about the data structures used to read the data file. An application was written to demonstrate how the data file can be read.
What are the best resources for Linux perf analysis?
perf-tools (github), a collection of my performance analysis tools based on Linux perf_events and ftrace. perf Main Page. The excellent perf Tutorial, which focuses more on CPU hardware counters. The Unofficial Linux Perf Events Web-Page by Vince Weaver. The perf user mailing list.
What is Perf in Linux?
Perf is a profiler tool for Linux 2.6+ based systems that abstracts away CPU hardware differences in Linux performance measurements and presents a simple commandline interface. Perf is based on the perf_events interface exported by recent versions of the Linux kernel. This article demonstrates the perf tool through example runs.
What is perf_events in Linux?
perf_events is part of the Linux kernel, under tools/perf. While it uses many Linux tracing features, some are not yet exposed via the perf command, and need to be used via the ftrace interface instead.
What is the Perf Linux profiler?
These are some examples of using the perf Linux profiler, which has also been called Performance Counters for Linux (PCL), Linux perf events (LPE), or perf_events. Like Vince Weaver, I’ll call it perf_events so that you can search on that term later. Searching for just “perf” finds sites on the police, petroleum, weed control, and a T-shirt.