1perf-kmem(1) 2============ 3 4NAME 5---- 6perf-kmem - Tool to trace/measure kernel memory properties 7 8SYNOPSIS 9-------- 10[verse] 11'perf kmem' {record|stat} [<options>] 12 13DESCRIPTION 14----------- 15There are two variants of perf kmem: 16 17 'perf kmem record <command>' to record the kmem events 18 of an arbitrary workload. 19 20 'perf kmem stat' to report kernel memory statistics. 21 22OPTIONS 23------- 24-i <file>:: 25--input=<file>:: 26 Select the input file (default: perf.data unless stdin is a fifo) 27 28-v:: 29--verbose:: 30 Be more verbose. (show symbol address, etc) 31 32--caller:: 33 Show per-callsite statistics 34 35--alloc:: 36 Show per-allocation statistics 37 38-s <key[,key2...]>:: 39--sort=<key[,key2...]>:: 40 Sort the output (default: 'frag,hit,bytes' for slab and 'bytes,hit' 41 for page). Available sort keys are 'ptr, callsite, bytes, hit, 42 pingpong, frag' for slab and 'page, callsite, bytes, hit, order, 43 migtype, gfp' for page. This option should be preceded by one of the 44 mode selection options - i.e. --slab, --page, --alloc and/or --caller. 45 46-l <num>:: 47--line=<num>:: 48 Print n lines only 49 50--raw-ip:: 51 Print raw ip instead of symbol 52 53--slab:: 54 Analyze SLAB allocator events. 55 56--page:: 57 Analyze page allocator events 58 59--live:: 60 Show live page stat. The perf kmem shows total allocation stat by 61 default, but this option shows live (currently allocated) pages 62 instead. (This option works with --page option only) 63 64SEE ALSO 65-------- 66linkperf:perf-record[1] 67