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Re: [rdiff-backup-users] Performance


From: rdiff
Subject: Re: [rdiff-backup-users] Performance
Date: Tue, 13 Feb 2007 13:34:21 -0800 (PST)


The VIA C3's aren't the most cpu efficient either. Pure arithmetic CPU on a 1ghz C3 is roughly equivelent to a Celeron 300mhz system [SiSoft Sandra]. They are nice for embedded/low power though if you don't need the horse power!

-Eric

On Tue, 13 Feb 2007, Corey Puffalt wrote:

Charles,

In my particular case it was primarily CPU bound as you can see from the
time info.  The CPU was between 95-100% busy the whole time.  This is what
concerned me.  Having a backup program being IO bound would hardly be a
surprise to anyone.  Being CPU bound was somewhat of a surprise to me.  Of
course, for those of you with 3.2Ghz versus 1Ghz machines are likely no
longer CPU bound.

Corey

On 2/13/07, Charles Duffy <address@hidden> wrote:

[...]
All that said, it would be interesting to do some benchmarking to see
where time is actually being spent -- waiting for network latency,
waiting for the filesystem or doing things in userspace. oprofile should
easily distinguish between the latter two cases; more primitive tools
(comparing wall-clock/user/system execution, for instance) should
provide more general data on the former.






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