| 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 |
| --------- |
| git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/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). |
| |
