Messages in this thread | | | Date | Tue, 3 Nov 1998 22:31:45 +0100 (MET) | From | Gerard Roudier <> | Subject | Re: GURU needed: Linux vs. FreeBSD |
| |
On Tue, 3 Nov 1998, Jason Venner wrote:
> Hard bad numbers: > > Linux uses far more cpu to move data to and from disk and to and from > network connections than freebsd does. > > Simple test. > > 1) > A = disk partition > > time dd if=A bs=32k of=/dev/null count=5000 > > linux box will use 90% of the cpu, freebsd will use 2% > [given a decent scsi system]
Are you crazy ?
Here is what I get on a PII-233 under Linux and a decent SCSI system:
5000+0 records in 5000+0 records out 0.02user 4.06system 0:08.58elapsed 47%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (76major+15minor)pagefaults 0swaps
And I have given a try under FreeBSD on the same system but didn't had time to move the results to Linux world:
Using block device: 6.4 s CPU reported and 8.5 MB/s calculated. Using raw device : about no cpu reported (0.3s) and 18 MB/s calculated.
I may report you the exact values if you need to be convinced, but if you have a decent SCSI system, you may try it by yourself.
Results on my system --------------------- - Using block device FreeBSD is way slower than Linux. - Using raw device it is as fast and about no CPU is consumed as expected by not stupid people.
Regards, Gerard.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |