On 8/1/07, Timo Sirainen <tss@iki.fi> wrote:

On Sun, 2007-07-29 at 21:27 -0400, Gary Gendel wrote:

...

All,

Nevermind... I discovered the problem. It was in the Solaris Sun Studio 12 compiler. I created a debug version to begin testing, but that version worked without sucking up the cpu. So it looks like the optimizer messed up. If I used the -fast optimization, it sucks up cpu, but with -xO5 all is well.

I heard about this before too. Would be nice to know if it really is a bug in Sun Studio or if the problem is caused by something done wrong in Dovecot's code.

can't you use dtrace or something to know where the CPU time will go ?

-- DINH Viêt Hoà

Last I heard it was that poll() was called all the time with zero (or 1ms?) timeout. So the problem is probably in src/lib/ioloop.c io_loop_get_wait_time() getting optimized wrong.

Hmm.. poll/timeout problems. Sounds suspiciously like:

http://groups.google.se/group/comp.unix.solaris/browse_thread/thread/28de6dd...

Just a wild guess, but hey... :-)

• Peter