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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: |
Thu, 21 Mar 2013 02:53:34 -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?
|
| You can compile that file with "-O2 -fno-gcse".
|
| Paolo
I don't note a huge improvement:
load averages: 6.74, 6.23, 5.17 leveno.fries.net 02:42:23
201 processes: 200 idle, 1 on processor
CPU0 states: 0.4% user, 0.0% nice, 33.3% system, 37.1% interrupt, 29.1% idle
CPU1 states: 0.2% user, 0.0% nice, 64.5% system, 0.0% interrupt, 35.3% idle
Memory: Real: 359M/907M act/tot Free: 80M Cache: 46M Swap: 1076M/4095M
Seconds to delay:
PID USERNAME PRI NICE SIZE RES STATE WAIT TIME CPU COMMAND
19820 todd -5 0 1116M 38M sleep/1 biowait 2:54 14.75% cc1
address@hidden/pE ~?239$ ps awwwx | grep cc1
19820 pz D+ 2:49.61 /usr/lib/gcc-lib/i386-unknown-openbsd5.3/4.2.1/cc1
-fpreprocessed /home/todd/.ccache/tmp/translate.tmp.leveno.fries.net.1478.i
-quiet -dumpbase translate.tmp.leveno.fries.net.1478.i -m32 -auxbase-strip
/home/todd/.ccache/6/2/648c89832d69fca8ff8953cca44f28-1086936.o.tmp.leveno.fries.net.1478
-g -O2 -Wstrict-prototypes -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
-Wno-redundant-decls -Wendif-labels -Wmissing-include-dirs -Wnested-externs
-Wformat-security -Wformat-y2k -Winit-self -Wold-style-definition -fPIE
-fno-strict-aliasing -fno-gcse -fstack-protector-all -o
/home/todd/.tmp/cc1YGXzU.s
Reading specs from /usr/lib/gcc-lib/i386-unknown-openbsd5.3/4.2.1/specs
Target: i386-unknown-openbsd5.3
Configured with: OpenBSD/i386 system compiler
Thread model: posix
gcc version 4.2.1 20070719
--
Todd Fries .. address@hidden
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http://todd.fries.net/pgp.txt
- [Qemu-devel] large memory requirements for translate.c a barrier, Todd T. Fries, 2013/03/15
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, Paolo Bonzini, 2013/03/16
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, qemu-devel, 2013/03/19
- Re: [Qemu-devel] large memory requirements for translate.c a barrier,
qemu-devel <=
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, Paolo Bonzini, 2013/03/21
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, qemu-devel, 2013/03/22
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, Wei-Ren Chen, 2013/03/22
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, qemu-devel, 2013/03/22
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, Peter Maydell, 2013/03/22
- Re: [Qemu-devel] large memory requirements for translate.c a barrier, Paolo Bonzini, 2013/03/22
Re: [Qemu-devel] large memory requirements for translate.c a barrier, Andreas Färber, 2013/03/19