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Diffstat (limited to 'Documentation/trace-cmd/trace-cmd-mem.1.txt')
| -rw-r--r-- | Documentation/trace-cmd/trace-cmd-mem.1.txt | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Documentation/trace-cmd/trace-cmd-mem.1.txt b/Documentation/trace-cmd/trace-cmd-mem.1.txt new file mode 100644 index 00000000..90e430b8 --- /dev/null +++ b/Documentation/trace-cmd/trace-cmd-mem.1.txt @@ -0,0 +1,74 @@ +TRACE-CMD-MEM(1) +================ + +NAME +---- +trace-cmd-mem - show memory usage of certain kmem events + +SYNOPSIS +-------- +*trace-cmd mem* ['OPTIONS']['input-file'] + +DESCRIPTION +----------- +The trace-cmd(1) mem requires a trace-cmd record that enabled the following +events: + + kmalloc + kmalloc_node + kfree + kmem_cache_alloc + kmem_cache_alloc_node + kmem_cache_alloc_free + +It then reads the amount requested and the ammount freed as well as the +functions that called the allocation. It then reports the final amount +of bytes requested and allocated, along with the total amount allocated +and requested, as well as the max allocation and requested during the run. +It reports the amount of wasted bytes (allocated - requested) that was +not freed, as well as the max wasted amount during the run. The list is +sorted by descending order of wasted bytes after the run. + + Function Waste Alloc req TotAlloc TotReq MaxAlloc MaxReq MaxWaste + -------- ----- ----- --- -------- ------ -------- ------ -------- + rb_allocate_cpu_buffer 768 2304 1536 2304 1536 2304 1536 768 + alloc_pipe_info 400 1152 752 1152 752 1152 752 400 + instance_mkdir 252 544 292 544 292 544 292 252 + __d_alloc 215 1086560 1086345 1087208 1086993 1086560 1086345 215 + get_empty_filp 72 2304 2232 4864 4712 4864 4712 152 + mm_alloc 40 960 920 960 920 960 920 40 + prepare_creds 32 192 160 1728 1440 1728 1440 288 + tracing_buffers_open 8 32 24 32 24 32 24 8 + do_brk 0 0 0 368 368 368 368 0 + journal_add_journal_head 0 6048 6048 6048 6048 6048 6048 0 + journal_start 0 0 0 1224 1224 48 48 0 + __rb_allocate_pages 0 3289856 3289856 3289856 3289856 3289856 3289856 0 + anon_vma_alloc 0 0 0 936 936 864 864 0 + [...] + +OPTIONS +------- +*-i* 'input-file':: + By default, trace-cmd hist will read the file 'trace.dat'. But the *-i* + option open up the given 'input-file' instead. Note, the input file may + also be specified as the last item on the command line. + +SEE ALSO +-------- +trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), +trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-hist(1), +trace-cmd-split(1), trace-cmd-listen(1) + +AUTHOR +------ +Written by Steven Rostedt, <rostedt@goodmis.org> + +RESOURCES +--------- +https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/ + +COPYING +------- +Copyright \(C) 2013 Red Hat, Inc. Free use of this software is granted under +the terms of the GNU Public License (GPL). + |