Re: BFS vs. mainline scheduler benchmarks and measurements

From: Jens Axboe
Date: Mon Sep 07 2009 - 16:46:52 EST

On Mon, Sep 07 2009, Ingo Molnar wrote:
> * Jens Axboe <jens.axboe@xxxxxxxxxx> wrote:
> > Agree, I was actually looking into doing joint latency for X
> > number of tasks for the test app. I'll try and do that and see if
> > we can detect something from that.
> Could you please try latest -tip:
> (c26f010 or later)
> Does it get any better with make -j128 build jobs? Peter just fixed

The compile 'problem' is on my workstation, which is a dual core Intel
core 2. I use -j4 on that typically. On the bigger boxes, I don't notice
any interactivity problems, largely because I don't run anything latency
sensitive on those :-)

> a bug in the SMP load-balancer that can cause interactivity problems
> on large CPU count systems.

Worth trying on the dual core box?

Jens Axboe

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