93 lines
2.2 KiB
Plaintext
93 lines
2.2 KiB
Plaintext
|
perf-mem(1)
|
||
|
|
===========
|
||
|
|
|
||
|
|
NAME
|
||
|
|
----
|
||
|
|
perf-mem - Profile memory accesses
|
||
|
|
|
||
|
|
SYNOPSIS
|
||
|
|
--------
|
||
|
|
[verse]
|
||
|
|
'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
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
In addition, for report all perf report options are valid, and for record
|
||
|
|
all perf record options.
|
||
|
|
|
||
|
|
SEE ALSO
|
||
|
|
--------
|
||
|
|
linkperf:perf-record[1], linkperf:perf-report[1]
|