Re: ~5 percent kernel performance loss in the last 3 weeks

To: tech-kern%netbsd.org@localhost, port-amd64%netbsd.org@localhost
Subject: Re: ~5 percent kernel performance loss in the last 3 weeks
From: Christoph Badura <bad%bsd.de@localhost>
Date: Wed, 4 Dec 2013 14:09:49 +0100

On Tue, Nov 19, 2013 at 04:02:51PM +0100, Christoph Badura wrote:
> After updating my -current kernel from 6.99.24 to 6.99.27 so I could
> commit my ubsec(4) changes I noticed that under 6.99.27 I get between
> 3 and 8 percent less throughput on accelerated crypto ops.

I was able to pin this down on the pcu/fpu changes.  A kernel from just
before that change doesn't have the performance loss.

--chris

Follow-Ups:
- Re: ~5 percent kernel performance loss in the last 3 weeks
  - From: David Holland
- Re: ~5 percent kernel performance loss in the last 3 weeks
  - From: Thomas Klausner

References:
- ~5 percent kernel performance loss in the last 3 weeks
  - From: Christoph Badura

Prev by Date: Re: [patch] put ptrdiff_t in the kernel and create sys/stddef.h
Next by Date: Re: Lua in the kernel...
Previous by Thread: Re: ~5 percent kernel performance loss in the last 3 weeks
Next by Thread: Re: ~5 percent kernel performance loss in the last 3 weeks
Indexes:

Home | Main Index | Thread Index | Old Index