доступ к памяти профиля (Profile memory accesses)
Имя (Name)
perf-mem - Profile memory accesses
Синопсис (Synopsis)
perf mem [<options>] (record [<command>] | report)
Описание (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.
Параметры (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
Параметры записи (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.
Смотри также (See also)
perf-record(1), perf-report(1)
