4.11 snapshots?

[Dimitry Andric]

Dmitry Pryanishnikov wrote:
>   Well, have you seen my simple performance benchmarking RELENG_4 vs 6?
> IMHO it mimics quote common usage pattern: it just downloads a large file
> with 10Mbps rate and stores it on UFS filesystem. On the same hardware
> (i386 uniprocessor Celeron-333 system with 128Mb RAM and fast SAMSUNG
> SP0802N
> HDD using UDMA33) under the same conditions, using more optimal config
> (INVARIANTS removed) RELENG_6 (and 5) _still_ uses >= 50% of CPU time
> for (Intr+Sys), while RELENG_4 doesn't use more than 28% for them.

Just as a test for RELENG_6, could you try setting kern.hz="100" in your
loader.conf, and repeating your tests?  I'm just guessing, but maybe the
higher interrupt rate is a bit too much for an old Celeron... :)

Cheers,
Dimitry