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Stephane Eranian028f12e2013-01-24 16:10:38 +01001perf-mem(1)
2===========
3
4NAME
5----
6perf-mem - Profile memory accesses
7
8SYNOPSIS
9--------
10[verse]
11'perf mem' [<options>] (record [<command>] | report)
12
13DESCRIPTION
14-----------
Stephane Eranian67121f82014-12-17 16:23:55 +010015"perf mem record" runs a command and gathers memory operation data
Stephane Eranian028f12e2013-01-24 16:10:38 +010016from it, into perf.data. Perf record options are accepted and are passed through.
17
Stephane Eranian67121f82014-12-17 16:23:55 +010018"perf mem report" displays the result. It invokes perf report with the
19right set of options to display a memory access profile. By default, loads
20and stores are sampled. Use the -t option to limit to loads or stores.
Stephane Eranian028f12e2013-01-24 16:10:38 +010021
Andi Kleenb6394092014-02-28 06:02:14 -080022Note that on Intel systems the memory latency reported is the use-latency,
23not the pure load (or store latency). Use latency includes any pipeline
24queueing delays in addition to the memory subsystem latency.
25
Stephane Eranian028f12e2013-01-24 16:10:38 +010026OPTIONS
27-------
28<command>...::
29 Any command you can specify in a shell.
30
31-t::
32--type=::
Stephane Eranian67121f82014-12-17 16:23:55 +010033 Select the memory operation type: load or store (default: load,store)
Stephane Eranian028f12e2013-01-24 16:10:38 +010034
35-D::
36--dump-raw-samples=::
37 Dump the raw decoded samples on the screen in a format that is easy to parse with
38 one sample per line.
39
40-x::
41--field-separator::
42 Specify the field separator used when dump raw samples (-D option). By default,
43 The separator is the space character.
44
45-C::
46--cpu-list::
47 Restrict dump of raw samples to those provided via this option. Note that the same
48 option can be passed in record mode. It will be interpreted the same way as perf
49 record.
50
51SEE ALSO
52--------
53linkperf:perf-record[1], linkperf:perf-report[1]