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Asmod
n00b
Joined: 11 Jan 2003
Posts: 24
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 Posted: Tue May 04, 2004 6:15 pm Post subject: Does emerge take advantage of multiple cpu's? |
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I've just got gentoo 2004.1 up and running. I've got SMP enabled, if I do a cat /proc/cpuinfo I see this
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processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 1
model name : Pentium Pro
stepping : 9
cpu MHz : 199.012
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
bogomips : 388.09
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 1
model name : Pentium Pro
stepping : 9
cpu MHz : 199.012
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
bogomips : 396.28
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 1
model name : Pentium Pro
stepping : 9
cpu MHz : 199.012
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
bogomips : 396.28
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If I emerge something and then run top I see this
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top - 19:13:14 up 49 min, 4 users, load average: 1.11, 1.41, 1.34
Tasks: 59 total, 2 running, 57 sleeping, 0 stopped, 0 zombie
Cpu0 : 5.9% us, 11.1% sy, 0.0% ni, 82.6% id, 0.0% wa, 0.3% hi, 0.0% si
Cpu1 : 0.3% us, 2.0% sy, 0.0% ni, 94.1% id, 3.6% wa, 0.0% hi, 0.0% si
Cpu2 : 68.5% us, 17.7% sy, 0.0% ni, 13.1% id, 0.7% wa, 0.0% hi, 0.0% si
Mem: 189392k total, 164504k used, 24888k free, 28256k buffers
Swap: 498004k total, 0k used, 498004k free, 48380k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6267 root 25 0 8480 6372 4256 R 19.0 3.4 0:01.74 cc1
6179 root 19 0 2608 1532 1868 S 6.5 0.8 0:00.59 sh
25472 root 16 0 1944 996 1740 S 0.4 0.5 0:17.56 top
27205 root 16 0 1944 1004 1740 R 0.4 0.5 0:14.75 top
26603 root 16 0 6504 1932 5876 S 0.2 1.0 0:03.08 sshd
6266 root 19 0 1788 748 1360 S 0.2 0.4 0:00.02 gcc
17 root 15 0 0 0 0 S 0.1 0.0 0:03.40 pdflush
1 root 16 0 1408 468 1256 S 0.0 0.2 0:04.46 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.01 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
6 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/2
7 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2
8 root 5 -10 0 0 0 S 0.0 0.0 0:00.12 events/0
9 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/1
10 root 10 -10 0 0 0 S 0.0 0.0 0:00.00 events/2
11 root 5 -10 0 0 0 S 0.0 0.0 0:00.01 kblockd/0
12 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/1
13 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/2
14 root 25 0 0 0 0 S 0.0 0.0 0:00.00 khubd
15 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kirqd
16 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
18 root 15 0 0 0 0 S 0.0 0.0 0:01.98 kswapd0
19 root 7 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
20 root 8 -10 0 0 0 S 0.0 0.0 0:00.00 aio/1
21 root 9 -10 0 0 0 S 0.0 0.0 0:00.00 aio/2
22 root 25 0 0 0 0 S 0.0 0.0 0:00.32 kseriod
23 root 25 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
24 root 25 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_1
25 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khpsbpkt
26 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 reiserfs/0
27 root 7 -10 0 0 0 S 0.0 0.0 0:00.00 reiserfs/1
28 root 8 -10 0 0 0 S 0.0 0.0 0:00.00 reiserfs/2
140 root 16 0 1756 896 1440 S 0.0 0.5 0:00.09 devfsd
5155 root 15 0 1652 668 1476 S 0.0 0.4 0:00.08 syslog-ng
5359 root 16 0 1708 636 1416 S 0.0 0.3 0:00.00 cron
5374 root 17 0 2196 980 1764 S 0.0 0.5 0:00.07 login
5375 root 16 0 2196 980 1764 S 0.0 0.5 0:00.05 login
5376 root 16 0 2196 980 1764 S 0.0 0.5 0:00.04 login
5377 root 16 0 1452 564 1280 S 0.0 0.3 0:00.00 agetty
5378 root 16 0 1452 564 1280 S 0.0 0.3 0:00.01 agetty
5379 root 16 0 1452 564 1280 S 0.0 0.3 0:00.00 agetty
5380 root 16 0 2196 1252 1996 S 0.0 0.7 0:00.18 bash
5583 root 15 0 2196 1224 1996 S 0.0 0.6 0:00.04 bash
6752 root 16 0 10952 7572 5600 S 0.0 4.0 0:05.39 emerge
7873 root 18 0 1612 604 1432 S 0.0 0.3 0:00.03 sandbox
7874 root 16 0 2496 1460 1868 S 0.0 0.8 0:00.71 ebuild.sh
15406 root 18 0 2072 1048 1868 S 0.0 0.6 0:00.02 emake
15407 root 18 0 2128 876 1484 S 0.0 0.5 0:00.03 make
15408 root 17 0 2060 992 1868 S 0.0 0.5 0:00.02 sh
25468 root 15 0 2196 1224 1996 S 0.0 0.6 0:00.03 bash
26536 root 16 0 3508 1432 3136 S 0.0 0.8 0:00.00 sshd
26606 root 15 0 2196 1244 1996 S 0.0 0.7 0:00.04 bash
608 root 17 0 2060 1004 1868 S 0.0 0.5 0:00.00 sh
609 root 20 0 2132 884 1484 S 0.0 0.5 0:00.03 make
610 root 17 0 2060 992 1868 S 0.0 0.5 0:00.02 sh
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This doesn't look like emerge is making use of my 2 other cpu's. I have MAKEOPTS="-j4" in /etc/make.conf.
Is this the norm or is there something else I can enable?
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moocha
Watchman
Joined: 21 Oct 2003
Posts: 5722
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| Posted: Tue May 04, 2004 7:41 pm Post subject: |
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Depends on the way the compile process is set up for each application. Some insist on building sequentially, or make refuses to parallelize the build process for some reason. MAKEOPTS="-j3" usually works like a charm for my workstation - dual Pentium 3.
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Rainmaker
Veteran
Joined: 12 Feb 2004
Posts: 1650
Location: /home/NL/ehv/
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| Posted: Tue May 04, 2004 11:02 pm Post subject: |
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true, things like gcc, glibc and kernels (and many, many others) refuse to be build by distcc / multiple processors, because the compiled program would be instable / not as good as it could be...
If you really want to try, set MAKEOPTS to -j, without a number... This will use ALL available processor power (excluding `nice` values)
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