NAME
perf-kmem - Tool to trace/measure kernel memory propertiesSYNOPSIS
perf kmem [<options>] {record|stat}
DESCRIPTION
There are two variants of perf kmem:'perf kmem [<options>] record [<perf-record-options>] <command>' to record the kmem events of an arbitrary workload. Additional 'perf record' options may be specified after record, such as '-o' to change the output file name.
'perf kmem [<options>] stat' to report kernel memory statistics.
OPTIONS
-i <file>, --input=<file>For stat, select the input file (default:
perf.data unless stdin is a fifo)
Don’t do ownership validation
Be more verbose. (show symbol address,
etc)
Show per-callsite statistics
Show per-allocation statistics
Sort the output (default:
frag,hit,bytes for slab and bytes,hit for page). Available sort
keys are ptr, callsite, bytes, hit, pingpong, frag for slab and
page, callsite, bytes, hit, order, migtype, gfp for page. This
option should be preceded by one of the mode selection options - i.e. --slab,
--page, --alloc and/or --caller.
Print n lines only
Print raw ip instead of symbol
Analyze SLAB allocator events.
Analyze page allocator events
Show live page stat. The perf kmem shows total
allocation stat by default, but this option shows live (currently allocated)
pages instead. (This option works with --page option only)
Only analyze samples within given time window:
<start>,<stop>. Times have the format seconds.microseconds. If
start is not given (i.e., time string is ,x.y) then analysis starts at
the beginning of the file. If stop time is not given (i.e, time string is
x.y,) then analysis goes to end of file.
SEE ALSO
perf-record(1)2024-06-21 | perf |