PERF−KMEM - Online Linux Manual PageSection : 1
Updated : 03/30/2021
Source : perf
Note : perf Manual
NAMEperf-kmem − Tool to trace/measure kernel memory properties
SYNOPSISperf kmem {record|stat} [<options>]
DESCRIPTIONThere 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.
OPTIONS−i <file>, −−input=<file> Select the input file (default: perf.data unless stdin is a fifo) −f, −−force Don’t do ownership validation −v, −−verbose Be more verbose. (show symbol address, etc) −−caller Show per−callsite statistics −−alloc 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 −−raw−ip Print raw ip instead of symbol −−slab Analyze SLAB allocator events. −−page Analyze page allocator events −−live 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) −−time=<start>,<stop> 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 ALSOperf-record(1) 0
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