PERF-MEM(1)                      perf Manual                     PERF-MEM(1)

NAME         top

       perf-mem - Profile memory accesses

SYNOPSIS         top

       perf mem [<options>] (record [<command>] | report)

DESCRIPTION         top

       "perf mem record" runs a command and gathers memory operation data
       from it, into 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.

OPTIONS         top

           Any command you can specify in a shell.

       -t, --type=
           Select the memory operation type: load or store (default:

       -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
           Specify the field separator used when dump raw samples (-D
           option). By default, The separator is the space character.

       -C, --cpu-list
           Restrict dump of raw samples to those provided via this option.
           Note that the same option can be passed in record mode. It will
           be interpreted the same way as perf record.

       -K, --all-kernel
           Configure all used events to run in kernel space.

       -U, --all-user
           Configure all used events to run in user space.

           Specify desired latency for loads event.

       -p, --phys-data
           Record/Report sample physical addresses

SEE ALSO         top

       perf-record(1), perf-report(1)

COLOPHON         top

       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 ⟨⟩.  If
       you have a bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨⟩ on
       2018-02-02.  (At that time, the date of the most recent commit that
       was found in the repository was 2018-02-01.)  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

perf                             09/14/2017                      PERF-MEM(1)

Pages that refer to this page: perf-c2c(1)