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



NAME
       perf-mem - Profile memory accesses

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

DESCRIPTION
       "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.

OPTIONS
       <command>...
           Any command you can specify in a shell.

       -t, --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
           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.

       --ldload
           Specify desired latency for loads event.

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



perf                              01/23/2018                       PERF-MEM(1)