Hi Pekka, On Tue, Jan 22, 2013 at 10:41 AM, Pekka Enberg <penberg@xxxxxxxxxx> wrote: > (Adding acme to CC.) > > On Tue, Jan 22, 2013 at 11:46 AM, Ezequiel Garcia > <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> wrote: >> From: Ezequiel Garcia <elezegarcia@xxxxxxxxx> >> >> The purpose of trace_analyze.py tool is to perform static >> and dynamic memory analysis using a kmem ftrace >> log file and a built kernel tree. >> >> This script and related work has been done on the CEWG/2012 project: >> "Kernel dynamic memory allocation tracking and reduction" >> (More info here [1]) >> >> It produces mainly two kinds of outputs: >> * an account-like output, similar to the one given by Perf, example below. >> * a ring-char output, examples here [2]. >> >> $ ./scripts/tracing/trace_analyze.py -k linux -f kmem.log --account-file account.txt >> $ ./scripts/tracing/trace_analyze.py -k linux -f kmem.log -c account.txt >> >> This will produce an account file like this: >> >> current bytes allocated: 669696 >> current bytes requested: 618823 >> current wasted bytes: 50873 >> number of allocs: 7649 >> number of frees: 2563 >> number of callers: 115 >> >> total waste net alloc/free caller >> --------------------------------------------- >> 299200 0 298928 1100/1 alloc_inode+0x4fL >> 189824 0 140544 1483/385 __d_alloc+0x22L >> 51904 0 47552 811/68 sysfs_new_dirent+0x4eL >> [...] >> >> [1] http://elinux.org/Kernel_dynamic_memory_analysis >> [2] http://elinux.org/Kernel_dynamic_memory_analysis#Current_dynamic_footprint >> >> Cc: Pekka Enberg <penberg@xxxxxxxxxx> >> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> >> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> >> Cc: Ingo Molnar <mingo@xxxxxxxxxx> >> Signed-off-by: Ezequiel Garcia <elezegarcia@xxxxxxxxx> > > Looks really useful! Dunno if this makes most sense as a separate > script or as an extension perf. > I'm glad you think so. Regarding the perf extension, I would have to think about that. I guess you mean convert this script to use the python binding? Will it still be able to work off-box? (a typical embedded scenario) -- Ezequiel -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>