![nanog logo](/images/nanog-logo.png)
nanog mailing list archives
Re: GSR, 7600, Juniper M?, oh my!
From: Richard A Steenbergen <ras () e-gerbil net>
Date: Mon, 12 Jan 2004 22:13:34 -0500
On Tue, Jan 13, 2004 at 02:01:48AM +0100, Jesper Skriver wrote:
On Wed, Jan 07, 2004 at 11:44:20PM +0200, Tarko Tikan wrote:hello!What was your CPU utilization prior to the upgrade?Like always before the upgrade - 95% :) Currently on npe-g1 it's 80% on peak times with traffic numbers I mentioned before and 4500 online modems, 3000 cpe'sCPU utilization on a software based router is not linear, said in a different way, even when CPU hits 100% it can still forward significantly faster.
That would depend what is causing the CPU usage. If it is software based IP header lookups, you're not going to get any more peformance out of it by trying to do more lookups than your CPU can handle. If on the other hand the CPU usage is interrupt load, then yes forwarding rates could continue to go up even after the CPU hits 100% (assuming the priorities aren't such that you kill the rest of the box, routing protocols etc), at the expense of latency. -- Richard A Steenbergen <ras () e-gerbil net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
Current thread:
- Re: GSR, 7600, Juniper M?, oh my!, (continued)
- Re: GSR, 7600, Juniper M?, oh my! Neil J. McRae (Jan 08)
- RE: GSR, 7600, Juniper M?, oh my! Drew Weaver (Jan 07)
- RE: GSR, 7600, Juniper M?, oh my! Alex Rubenstein (Jan 07)
- RE: GSR, 7600, Juniper M?, oh my! Michel Py (Jan 07)
- RE: GSR, 7600, Juniper M?, oh my! jlewis (Jan 07)
- RE: GSR, 7600, Juniper M?, oh my! Jason Frisvold (Jan 07)
- Re: GSR, 7600, Juniper M?, oh my! Tarko Tikan (Jan 07)
- RE: GSR, 7600, Juniper M?, oh my! Christopher J. Wolff (Jan 07)
- Re: GSR, 7600, Juniper M?, oh my! Tarko Tikan (Jan 07)
- Re: GSR, 7600, Juniper M?, oh my! Jesper Skriver (Jan 12)
- Re: GSR, 7600, Juniper M?, oh my! Richard A Steenbergen (Jan 12)
- RE: GSR, 7600, Juniper M?, oh my! David Schwartz (Jan 13)
- Re: GSR, 7600, Juniper M?, oh my! Tarko Tikan (Jan 07)
- Re: GSR, 7600, Juniper M?, oh my! JC Dill (Jan 08)