On Mon, Nov 05, 2018 at 03:20:15PM +0900, Xin Long wrote: SNIP
> > > > [root@ibm-x3650m4-02 perf]# ./perf probe 'consume_skb' > > > > [root@ibm-x3650m4-02 perf]# ./perf record -g -e probe:consume_skb* -aR > > > > ^C > > > > > > > Thanks Jiri, > > > > > > My debugging script is using tracepoint with some filters which I > > > don't think probe can support. > > > Any one have fixes for this tracepoint issue? > > > > trying to bisect that.. looks like orc code issue, > > it works for me when you switch to fp unwind: > > CONFIG_UNWINDER_FRAME_POINTER > > > > That's a good workaround, thanks. > > Another problem is when I'm using perf built manually from upstream kernel > tree, > I couldn't see the function's names. > # perf --version > perf version 4.19.g26f1de > > # perf report -T > # To display the perf.data header info, please use > --header/--header-only options. > # > # > # Total Lost Samples: 0 > # > # Samples: 97 of event 'probe:consume_skb' > # Event count (approx.): 97 > # > # Children Self Trace output > # ........ ........ .................. > # > 100.00% 100.00% (ffffffff86f090f0) > | > |--93.81%--0xffffffff868000e6 > | 0xffffffff8684ed7f > | 0xffffffff868e97ad > | 0xffffffff868e953a > | 0xffffffff87087623 > | 0xffffffff8682a06f > | 0xffffffff870872ad > | | > | |--89.69%--0xffffffff8720098f > | | 0xffffffff87201b69 > | | 0xffffffff868b9c2e > > > The below is with rhel7's perf > # perf --version > perf version 3.10.0-957.el7.x86_64.debug > # perf report -T > # To display the perf.data header info, please use > --header/--header-only options. > # > # > # Total Lost Samples: 0 > # > # Samples: 97 of event 'probe:consume_skb' > # Event count (approx.): 97 > # > # Children Self Trace output > # ........ ........ .................. > # > 100.00% 100.00% (ffffffff86f090f0) > | > |--93.81%--0x2000e6 > | start_secondary > | cpu_startup_entry > | do_idle > | default_idle_call > | arch_cpu_idle > | default_idle > | | > | |--89.69%--ret_from_intr > | | do_IRQ > | | irq_exit I think that's already fixed on Arnaldo's perf/urgent branch, git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git but perhaps this post as well: https://lore.kernel.org/lkml/20181031091043.23465-1-adrian.hun...@intel.com/ please give it a try.. it should be merged in soon jirka
