Original post is here: eklausmeier.goip.de
Compare linux-3.8.4: Compile times. This time we compiled Linux kernel 3.9 and used
time make -j 20
according Compiler Speed-up.
My 8-core machine is fully loaded, as can be seen by top:
[more_WP_Tag]
top - 21:08:50 up 30 min, 10 users, load average: <strong>21.92</strong>, 16.95, 8.40
Tasks: 257 total, 25 running, 232 sleeping, 0 stopped, 0 zombie
Cpu0 : 96.3%us, 3.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 93.7%us, 6.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 93.4%us, 6.6%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 94.0%us, 6.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 94.4%us, 4.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu5 : 81.7%us, 10.0%sy, 8.3%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 92.7%us, 7.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 93.4%us, 6.6%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 16380376k total, 5714084k used, 10666292k free, 95536k buffers
Swap: 31250428k total, 0k used, 31250428k free, 3726372k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6806 klm 20 0 94456 67m 7212 R 44 0.4 0:01.76 cc1
5977 klm 20 0 159m 133m 7196 R 38 0.8 0:04.53 cc1
6844 klm 20 0 82056 55m 7152 R 38 0.3 0:01.33 cc1
6943 klm 20 0 71384 45m 7200 R 31 0.3 0:00.95 cc1
7009 klm 20 0 74416 47m 7128 R 23 0.3 0:00.69 cc1
7011 klm 20 0 72028 45m 7016 S 21 0.3 0:00.64 cc1
7034 klm 20 0 67952 41m 6892 R 17 0.3 0:00.52 cc1
7082 klm 20 0 73764 44m 3848 R 15 0.3 0:00.45 cc1
7053 klm 20 0 70628 43m 6532 R 15 0.3 0:00.44 cc1
7092 klm 20 0 70736 41m 4392 R 14 0.3 0:00.41 cc1
2040 boinc 30 10 28.2g 100m 44m R 9 0.6 4:03.08 acemd.2868
7125 klm 20 0 55280 26m 3536 R 8 0.2 0:00.23 cc1
7106 klm 20 0 51720 26m 6380 R 7 0.2 0:00.21 cc1
7144 klm 20 0 45028 16m 3520 R 4 0.1 0:00.11 cc1
7149 klm 20 0 44900 15m 3520 R 4 0.1 0:00.11 cc1
7167 klm 20 0 39076 8656 2164 R 3 0.1 0:00.09 cc1
7160 klm 20 0 10172 6296 524 R 2 0.0 0:00.07 genksyms
7178 klm 20 0 40572 11m 3496 R 2 0.1 0:00.07 cc1
7175 klm 20 0 37448 6848 2164 R 2 0.0 0:00.05 cc1
5981 klm 20 0 23248 10m 1320 S 1 0.1 0:00.07 as
7169 klm 20 0 7400 3656 524 S 1 0.0 0:00.04 genksyms
7181 klm 20 0 38484 10m 3488 R 1 0.1 0:00.04 cc1
1304 root 20 0 141m 47m 20m S 1 0.3 1:06.16 Xorg
7014 klm 20 0 20212 7152 1316 R 1 0.0 0:00.02 as
Machine is running GPUGRID (acmed.2868 with NICE=10), and Google Chrome (WordPress).
Time needed to compile is roughly 15 minutes, speed-up round about 6, compared to make -j 1:
. . .
IHEX2FW firmware/whiteheat.fw
IHEX2FW firmware/keyspan_pda/keyspan_pda.fw
IHEX2FW firmware/keyspan_pda/xircom_pgs.fw
IHEX firmware/yam/1200.bin
IHEX firmware/yam/9600.bin
real <strong>14m25.927s</strong>
user <strong>94m53.496s</strong>
sys 9m40.340s
After that creating all modules is required:
INSTALL_MOD_PATH=/tmp time make -j 20 modules_install
We do not want to call make as root, so we deposit all files under /tmp. Later as user root
mv /tmp/lib/modules/3.9.0/ /lib/modules/
mv /tmp/lib/firmware/ /lib/firmware/3.9.0