Re: one performance observation/question and one commit/segfault issue

On Sat, 24 Jul 2004, [UTF-8] Branko Ä^Libej wrote:

> My guess is filesystem performance on the client. I've observer myself
> that Subversion tests take about twice as long to run on a Windows
> machine than on a (comparable) Linux machine; and since the CPU load is
> very low, and everything happens localy, filesystem performance is the
> most probably culprit.
>
You are probably right, and I mentioned the kind of filesystems not for
nothing: when I observed a checkout on that AIX 5.2 running on POWER 4+
with 1.2 GHz, topas displayed there not notable cpu user or system times,
but considerable wait times. Due to the fact, that the machine has a very
fast USCSI subsystem (320 MB/s bus) and disk, jfs(2) seems to be the only
possible culprit to me. Likely this is similar on other non-Linux/Solaris
systems more or less too.

> For example, I've noticed a similar spread of FS performance (Solaris
> better than Windows better thatn HP-UX) when I was working on another
> project that has nothing to do with Subversion, but was very I/O bound.
>
Considering the hardware data, in comparison AIX/jfs(2) seems to be even
worse than HP-UX/Vxfs ;-)

So there can be done little, eh? But I can recommend my colleagues to
switch from MS Windows to GNU/Linux at least for one more good reason ;-)

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