(2012/04/12 3:17), Arnaldo Carvalho de Melo wrote: > Em Wed, Apr 11, 2012 at 10:42:25PM +0530, Srikar Dronamraju escreveu: >> * Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxx> [2012-04-11 11:49:18]: >>> Em Wed, Apr 11, 2012 at 07:27:42PM +0530, Srikar Dronamraju escreveu: >>>> From: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx> >>>> >>>> - Enhances perf to probe user space executables and libraries. >>>> - Enhances -F/--funcs option of "perf probe" to list possible probe points in >>>> an executable file or library. >>>> - Documents userspace probing support in perf. >>>> >>>> [ Probing a function in the executable using function name ] >>>> perf probe -x /bin/zsh zfree >>> >>> Can we avoid the need for -x? I.e. we could figure out it is userspace >>> and act accordingly. >> >> To list the functions in the module ipv6, we use "perf probe -F -m ipv6" >> So I used the same logic to use -x for specifying executables. >> >> This is in agreement with probepoint addition where without any >> additional options would mean kernel probepoint; m option would mean >> module and x option would mean user space executable. >> >> However if you still think we should change, do let me know. > > Yeah, if one needs to disambiguate, sure, use these keywords, but for > things like: > > $ perf probe /lib/libc.so.6 malloc > > I think it is easy to figure out it is userspace. I.e. some regex would > figure it out. That's interessting to me too. Maybe it is also useful syntax for module specifying too. e.g. perf probe -m kvm kvm_timer_fn can be perf probe kvm.ko kvm_timer_fn (.ko is required) or if unloaded perf probe /lib/modules/XXX/kernel/virt/kvm.ko kvm_timer_fn Thanks! -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@xxxxxxxxxxx -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>