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

6       perf-mem - Profile memory accesses
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SYNOPSIS

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

12       "perf mem record" runs a command and gathers memory operation data from
13       it, into perf.data. Perf record options are accepted and are passed
14       through.
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16       "perf mem report" displays the result. It invokes perf report with the
17       right set of options to display a memory access profile. By default,
18       loads and stores are sampled. Use the -t option to limit to loads or
19       stores.
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21       Note that on Intel systems the memory latency reported is the
22       use-latency, not the pure load (or store latency). Use latency includes
23       any pipeline queueing delays in addition to the memory subsystem
24       latency.
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OPTIONS

27       <command>...
28           Any command you can specify in a shell.
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30       -i, --input=<file>
31           Input file name.
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33       -f, --force
34           Don’t do ownership validation
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36       -t, --type=<type>
37           Select the memory operation type: load or store (default:
38           load,store)
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40       -D, --dump-raw-samples
41           Dump the raw decoded samples on the screen in a format that is easy
42           to parse with one sample per line.
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44       -x, --field-separator=<separator>
45           Specify the field separator used when dump raw samples (-D option).
46           By default, The separator is the space character.
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48       -C, --cpu=<cpu>
49           Monitor only on the list of CPUs provided. Multiple CPUs can be
50           provided as a comma-separated list with no space: 0,1. Ranges of
51           CPUs are specified with -: 0-2. Default is to monitor all CPUS.
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53       -U, --hide-unresolved
54           Only display entries resolved to a symbol.
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56       -p, --phys-data
57           Record/Report sample physical addresses
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RECORD OPTIONS

60       -e, --event <event>
61           Event selector. Use perf mem record -e list to list available
62           events.
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64       -K, --all-kernel
65           Configure all used events to run in kernel space.
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67       -U, --all-user
68           Configure all used events to run in user space.
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70       -v, --verbose
71           Be more verbose (show counter open errors, etc)
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73       --ldlat <n>
74           Specify desired latency for loads event. (x86 only)
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76       In addition, for report all perf report options are valid, and for
77       record all perf record options.
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SEE ALSO

80       perf-record(1), perf-report(1)
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84perf                              11/12/2019                       PERF-MEM(1)
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