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.
-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
RECORD OPTIONS
-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.
SEE ALSO
perf-record(1), perf-report(1)
perf 12/18/2024 PERF-MEM(1)
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