Kernel compile times: HDD vs. SSD vs. TMPFS
Етикети:
linux
·
Hello, I've just done a 'benchmarking' on a kernel compilation, by compiling a kernel with the same .config on either HDD, SSD or TMPFS just to see the compiling times for my personal pleasure.
Some useful info:
CPU: i7-2600K OC @ 4.4GHz
Kernel version: 3.4.5
Command used: time make -j10
NOTE: To ensure equal conditions between each compilation I've used:
sync; echo 3 > /proc/sys/vm/drop_caches
Here are the results:
HDD
Technical data
Model: Western Digital 500GB 64MB cache (WDC WD5000AZRX)
Bandwith: ~120MB/s read/write
Seek time: ~10-12msec
Compilation time
Kernel: arch/x86/boot/bzImage is ready (#1)
real 2m13.178s
user 14m5.407s
sys 1m13.519s
SSD
Technical data
Model: OCZ Vertex 3 120GB
Bandwith: ~480MB/s read, ~320MB/s write
Seek time: ~1msec (0.40-0.70msec)
Compilation time
Kernel: arch/x86/boot/bzImage is ready (#1)
real 1m58.217s
user 13m3.937s
sys 1m2.879s
TMPFS
Technical data
Model: Kingston 1333MHz DDR3
Bandwith: ~18GB/s read, ~20GB/s write (actually useless data as tmpfs will never work at that speed)
Seek time: ~50nsec (0.00005msec)
Compilation time
Kernel: arch/x86/boot/bzImage is ready (#1)
real 1m59.639s
user 13m15.891s
sys 1m3.722s
NICE LOOKING TABLE
| HDD | SSD | TMPFS |
|---|---|---|
| 2m13s | 1m58s | 1m59s |
| 14m5s | 13m3s | 13m15s |
| 1m13s | 1m2s | 1m3s |
This really is a little bit of a surprise, the compilation on an SSD disk performed better than the one on RAM. And generally the difference between all of them wasn't *so* big. On older CPUs this might not be the case and HDD perform a lot worse than SSD/TMPFS.
Subscribe to:
Post Comments (Atom)
What the hell? 2 inute *Linux Kernel* compilation time?
ReplyDeleteremember that dealing with ramdisk is not dealing with pure ram but also a lot of other stuff is involved (drivers, ...).
ReplyDeleteThanks a lot for sharing. .
ReplyDelete