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Re: [Qemu-devel] large memory requirements for translate.c a barrier


From: qemu-devel
Subject: Re: [Qemu-devel] large memory requirements for translate.c a barrier
Date: Tue, 19 Mar 2013 10:05:48 -0500
User-agent: Mutt/1.5.21 (2010-09-15)

Penned by Paolo Bonzini on 20130316  3:14.29, we have:
| Il 15/03/2013 20:21, Todd T. Fries ha scritto:
| >   PID USERNAME PRI NICE  SIZE   RES STATE     WAIT      TIME    CPU COMMAND
| > 28818 todd      64    0 1142M   53M onproc/0  -         2:01 17.24% cc1
| > 
| > For systems with lower limits on user process memory, this prevents things
| > from building.
| > 
| > For systems with less physical ram, this presents lots of swapping just to
| > build the source files.
| > 
| > Is there any hints or hope of breaking translate.c up into a smaller file?
| 
| It's a GCC bug.  We have worked around it in recent versions of QEMU;
| what version are you trying to compile?

I'm using bisect to find a runtime behavior bug (OpenBSD/amd64 current's 
cd53.iso segv's in
userland) that showed up since 1.4.0 release.  So understandably I'm building 
lots of versions
and not able to stick with current for the duration of the bisection.

| You can compile that file with "-O2 -fno-gcse".

Awesome, I'll just do a global -fno-gcse and hope that doesn't effect the 
runtime bug I've
encountered to speed my compile times ;-)

Thanks,
-- 
Todd Fries .. address@hidden

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