On 06/29/2012 11:00, Fred Morcos wrote:
On Fri, Jun 29, 2012 at 10:53 AM, Wojciech Puchar
<woj...@wojtek.tensor.gdynia.pl> wrote:
Most probably all filesystems were used with defaults.
MAYBE softupdates, but not even sure for this. Compare this to linux which
is async-like. Comparing with UFS+async would be more fair.
Still - FreeBSD default MAXPHYS in param.h is far too low. i change it to
2048*1024 (default is 128*1024) and improvement on handling large files is
huge. I run that setting everywhere. No problems.
I already talked about it on forum but was ignored.
As for scientific processing it should not depend much from OS at all, but
for sure it depends on crappy compiler that Juniper wanted...
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I would not worry too much about what this guy says. Judging from his
interpretations of the plots, he doesn't seem to know much about the
benchmarks he is running and why they behave that way on the different
systems. I think he just runs and publishes everything that says
benchmark on it, without truly understanding what's going on or even
going through the effort of providing fair comparisons.
That said, I think that the Linux kernel performs better simply due to
wider adoption (larger developer base, wider set of use-cases, etc)
and thus a higher chance of getting performance improvements.
Note that stability matters too.
I remembered a bench on PostgreSQL where Linux was faster, but at some
point the machine had to be rebooted because it became unresponsive.
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