System profiling tools?

[Brien Dieterle]

bonnie, hdparm, is a good place to start for disk benchmarks

brien

Alan Dayley wrote:

>Let's suppose that I have a Linux file server.  It is working well and
>does nothing (discounting cron or other system processes) but serve
>shares.
>
>The server has 1Gb/s ethernet interface to the net and four 150MB/s SATA
>hard drives in Linux software RAID 5.  But, for all this hardware
>bandwidth I only get an effective throughput from my server of 40MB/s data
>transfers.
>
>I want to find the overhead.  Is it the software RAID?  Is it the SATA
>controller?  Is it the IP stack?  Or a combination of these or other
>things?
>
>What software tools are available to profile my system and help pinpoint
>the bottle neck(s)?
>
>Alan
>
>
>
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