Re: [PATCH] Radix-tree pagecache for 2.5

From: rwhron@earthlink.net
Date: Wed Feb 06 2002 - 17:06:34 EST


> They run fastest when you run each of the dbench forks
> sequentially and have the others stuck in get_request_wait.

One interesting part of tiotest is the latency measurements.
Latency isn't printed by tiobench.pl though. I think it's
valueable information (and wish I had it).

> This, of course, is completely unacceptable for real-world
> server scenarios, where all users of the server need to be
> serviced fairly.

Agreed. I'm glad kernel hackers focus on latency too. :)

There are _some_ applications where throughput is critical
though. I would prefer to measure both throughput and
latency at the same time, but am not yet clear on how to
deal with the Heisenberg principle.

-- 
Randy Hron

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