perf-kmem man page

perf-kmem — Tool to trace/measure kernel memory properties


perf kmem {record|stat} [<options>]


There are two variants of perf kmem:

'perf kmem record <command>' to record the kmem events
of an arbitrary workload.
'perf kmem stat' to report kernel memory statistics.


-i <file>, --input=<file>
Select the input file (default: perf.data unless stdin is a fifo)
-v, --verbose
Be more verbose. (show symbol address, etc)
Show per-callsite statistics
Show per-allocation statistics
-s <key[,key2...]>, --sort=<key[,key2...]>
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.
-l <num>, --line=<num>
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)

See Also



Explore man page connections for perf-kmem(1).