81 lines
1.9 KiB
Plaintext
81 lines
1.9 KiB
Plaintext
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perf-kmem(1)
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============
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NAME
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----
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perf-kmem - Tool to trace/measure kernel memory properties
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SYNOPSIS
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--------
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[verse]
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'perf kmem' [<options>] {record|stat}
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DESCRIPTION
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-----------
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There are two variants of perf kmem:
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'perf kmem [<options>] record [<perf-record-options>] <command>' to
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record the kmem events of an arbitrary workload. Additional 'perf
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record' options may be specified after record, such as '-o' to
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change the output file name.
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'perf kmem [<options>] stat' to report kernel memory statistics.
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OPTIONS
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-------
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-i <file>::
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--input=<file>::
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For stat, select the input file (default: perf.data unless stdin is a
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fifo)
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-f::
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--force::
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Don't do ownership validation
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-v::
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--verbose::
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Be more verbose. (show symbol address, etc)
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--caller::
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Show per-callsite statistics
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--alloc::
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Show per-allocation statistics
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-s <key[,key2...]>::
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--sort=<key[,key2...]>::
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Sort the output (default: 'frag,hit,bytes' for slab and 'bytes,hit'
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for page). Available sort keys are 'ptr, callsite, bytes, hit,
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pingpong, frag' for slab and 'page, callsite, bytes, hit, order,
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migtype, gfp' for page. This option should be preceded by one of the
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mode selection options - i.e. --slab, --page, --alloc and/or --caller.
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-l <num>::
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--line=<num>::
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Print n lines only
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--raw-ip::
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Print raw ip instead of symbol
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--slab::
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Analyze SLAB allocator events.
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--page::
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Analyze page allocator events
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--live::
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Show live page stat. The perf kmem shows total allocation stat by
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default, but this option shows live (currently allocated) pages
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instead. (This option works with --page option only)
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--time=<start>,<stop>::
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Only analyze samples within given time window: <start>,<stop>. Times
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have the format seconds.microseconds. If start is not given (i.e., time
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string is ',x.y') then analysis starts at the beginning of the file. If
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stop time is not given (i.e, time string is 'x.y,') then analysis goes
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to end of file.
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SEE ALSO
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--------
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linkperf:perf-record[1]
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