On Sat, Nov 24, 2012 at 09:15:27AM +1100, Cameron Simpson wrote: > On 23Nov2012 10:42, John Long <codeb...@inbox.lv> wrote: > | On Thu, Nov 22, 2012 at 11:40:33PM +0100, Richard wrote: > | > On Thu, Nov 22, 2012 at 06:42:27PM +0000, John Long wrote: > | > > My mutt on Linux has been locking up lately. I didn't compile it with > debug > | > > support. Is there any way to figure out why this is happening? I > sometimes > | > > lock up in the middle of composing a long email or when mutt has been > open > | > > for awhile. This didn't happen until this week and I suspect my email > | > > provider is messing up but I don't know how to check it. Once in awhile > mutt > | > > becomes non-responsive and there's nothing I can do but kill it or > close the > | > > terminal window. It doesn't respond to any keypresses. > | > > | > first thing to try is "strace -p pid-mutt" from a different terminal. > | > | Thanks, that fixed it! Just like when you take your car to the shop, it > | never exhibits the problem...I started strace this morning and the damn > | thing's been running fine for hours already! > > Some things are timing dependent, and strace does affect things;
I realized there might be a Heisenberg deal going on here but it seems odd since Mutt has been working for a few months on this box with zero issues. > best to _not_ strace, wait for failure, _then_ strace. > > You can also do more trageted stracing with the -e option, eg: > > strace -e trace=file -p mutt-pid > > If mutt has gone CPU bound it won't say anything, but if a system call > is hanging or mutt is spinning on one (I've seen Linux futexes do this > frequently, outstandingly annoying) it should show something. Hopefully > a call using a file path or file descriptor. If the latter, > > lsof -p pid-mutt > > should show you what that file descriptor is associated with. > > OTOH, if mutt is CPU bound and doing no system calls, gdb for a stace > backtrace may be illuminating. Thanks! I'll see what I can see. /jl -- ASCII ribbon campaign ( ) Powered by Lemote Fuloong against HTML e-mail X Loongson MIPS and OpenBSD and proprietary / \ http://www.mutt.org attachments / \ Code Blue or Go Home! Encrypted email preferred PGP Key 2048R/DA65BC04
