PERF-MEM(1) perf Manual PERF-MEM(1)
perf-mem - Profile memory accesses
perf mem [<options>] (record [<command>] | report)
"perf mem record" runs a command and gathers memory operation data from it, into perf.data. Perf record options are accepted and are passed through. "perf mem report" displays the result. It invokes perf report with the right set of options to display a memory access profile. By default, loads and stores are sampled. Use the -t option to limit to loads or stores. Note that on Intel systems the memory latency reported is the use-latency, not the pure load (or store latency). Use latency includes any pipeline queueing delays in addition to the memory subsystem latency.
<command>... Any command you can specify in a shell. -i, --input=<file> Input file name. -f, --force Don’t do ownership validation -t, --type=<type> Select the memory operation type: load or store (default: load,store) -D, --dump-raw-samples Dump the raw decoded samples on the screen in a format that is easy to parse with one sample per line. -x, --field-separator=<separator> Specify the field separator used when dump raw samples (-D option). By default, The separator is the space character. -C, --cpu=<cpu> Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to monitor all CPUS. -U, --hide-unresolved Only display entries resolved to a symbol. -p, --phys-data Record/Report sample physical addresses --data-page-size Record/Report sample data address page size
-e, --event <event> Event selector. Use perf mem record -e list to list available events. -K, --all-kernel Configure all used events to run in kernel space. -U, --all-user Configure all used events to run in user space. -v, --verbose Be more verbose (show counter open errors, etc) --ldlat <n> Specify desired latency for loads event. (x86 only) In addition, for report all perf report options are valid, and for record all perf record options.
This page is part of the perf (Performance analysis tools for Linux (in Linux source tree)) project. Information about the project can be found at ⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩. If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2021-08-26.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org perf 2021-01-20 PERF-MEM(1)
Pages that refer to this page: perf(1), perf-c2c(1)