2013-11-21 (목), 12:01 +0100, Jiri Olsa: > Backporting kmem plugin. > > Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb): > git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git > > This plugin adds call_site field resolving for following > tracepoint events: > kmem:kfree > kmem:kmalloc > kmem:kmalloc_node > kmem:kmem_cache_alloc > kmem:kmem_cache_alloc_node > kmem:kmem_cache_free > > The diff of 'perf script' output generated by old and new code: > (data was generated by 'perf record -e 'kmem:*' -a') > > --- script.kmem.old > +++ script.kmem.new > - perf 27846 [001] 29643.403319: kmem:kfree: > call_site=ffffffff810e64f6 ptr=(nil) > + perf 27846 [001] 29643.403238: kmem:kfree: > (__audit_syscall_exit+0x1f6) call_site=ffffffff810e64f6 ptr=(nil) > - perf 27846 [001] 29643.403337: kmem:kmem_cache_alloc: > call_site=ffffffff812ff0c5 ptr=0xffff88020e155630 bytes_req=560 > bytes_alloc=568 gfp_flags=GFP_KERNEL > + perf 27846 [001] 29643.403337: kmem:kmem_cache_alloc: > (radix_tree_preload+0x35) call_site=ffffffff812ff0c5 ptr=0xffff88020e155630 > bytes_req=560 bytes_alloc=568 gfp_flags=GFP_KERNEL > - perf 27846 [001] 29643.403342: kmem:kmem_cache_free: > call_site=ffffffff8126ec61 ptr=0xffff88020dffe750 > + perf 27846 [001] 29643.403342: kmem:kmem_cache_free: > (jbd2_journal_stop+0x221) call_site=ffffffff8126ec61 ptr=0xffff88020dffe750 > - firefox 954 [000] 29643.445477: kmem:kmem_cache_alloc_node: > call_site=ffffffff8153c64e ptr=0xffff8801cecb4000 bytes_req=256 > bytes_alloc=256 gfp_flags=GFP_KERNEL|GFP_REPEAT node=-1 > + firefox 954 [000] 29643.445477: kmem:kmem_cache_alloc_node: > (__alloc_skb+0x4e) call_site=ffffffff8153c64e ptr=0xffff8801cecb4000 > bytes_req=256 bytes_alloc=256 gfp_flags=GFP_KERNEL|GFP_REPEAT node=-1 > - perf 27846 [001] 29643.445510: kmem:kmalloc: > call_site=ffffffff81250642 ptr=0xffff88020fd6c300 bytes_req=96 bytes_alloc=96 > gfp_flags=GFP_NOFS|GFP_ZERO > + perf 27846 [001] 29643.445510: kmem:kmalloc: > (ext4_ext_find_extent+0x362) call_site=ffffffff81250642 > ptr=0xffff88020fd6c300 bytes_req=96 bytes_alloc=96 gfp_flags=GFP_NOFS|GFP_ZERO > - X 888 [002] 29643.445546: kmem:kmalloc_node: > call_site=ffffffff8153c67e ptr=0xffff880103828e00 bytes_req=384 > bytes_alloc=512 gfp_flags=GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP_NOMEMALLOC > node=-1 > + X 888 [002] 29643.445546: kmem:kmalloc_node: > (__alloc_skb+0x7e) call_site=ffffffff8153c67e ptr=0xffff880103828e00 > bytes_req=384 bytes_alloc=512 > gfp_flags=GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP_NOMEMALLOC node=-1
It'd be great if the "call_site" in the output changes to display function names instead of hex addresses directly. Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
