Em Thu, Apr 12, 2012 at 12:27:47PM +0900, Masami Hiramatsu escreveu: > > * Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxx> [2012-04-11 11:49:18]: > > 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 It may not even be required, since we can check in /proc/modules if "kvm" is there and as well if it has a function named "kvm_timer_fn". Also probably there is no library or binary on the current directory with such a name :-) Likewise, if we do: $ perf probe libc-2.12.so malloc It should just figure out it is the /lib64/libc-2.12.so Heck, even: $ perf probe libc malloc Makes it even easier to use. Its just when one asks for something that has ambiguities that the tool should ask the user to be a bit more precise to remove such ambiguity. After all... [acme@sandy linux]$ locate libc-2.12.so /home/acme/.debug/lib64/libc-2.12.so /home/acme/.debug/lib64/libc-2.12.so/293f8b6f5e6cea240d1bb0b47ec269ee91f31673 /home/acme/.debug/lib64/libc-2.12.so/5a7fad9dfcbb67af098a258bc2a20137cc954424 /lib64/libc-2.12.so /usr/lib/debug/lib64/libc-2.12.so.debug [acme@sandy linux]$ Only /lib64/libc-2.12.so is on the ld library path :-) And after people really start depending on this tool for day to day use, they may do like me: [root@sandy ~]# alias probe="perf probe" [root@sandy ~]# probe -F | grep skb_queue skb_queue_head skb_queue_purge skb_queue_tail [root@sandy ~]# Which gets it to the shortest possible form: $ probe libc malloc :-) Git has this nice feature that is on the same line of making things easier for the user: [acme@sandy linux]$ git fack git: 'fack' is not a git command. See 'git --help'. Did you mean this? fsck [acme@sandy linux]$ Hell, yes, fsck is what I meant! :-) - Arnaldo -- 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>