For G2 vs G1 that's correct. For ethernet vs. serial the performance from what I recall is less.
Rodney On Thu, Feb 21, 2008 at 12:35:32PM +0100, Ultramajestic wrote: > So as far as I understand, the performance is not degraded, isn't it? > > > El mi??, 20-02-2008 a las 09:30 -0500, Rodney Dunn escribi??: > > Philippe, > > > > I need to check back with the BU on it. I thought they were putting > > a document out on this G2 processing reporting issue. > > > > Basically due to the way the G2 does CPU accounting it looks > > like it's higher at lower loads based on the CPU measurements. > > > > If you put it in the lab and measure NDR's the CPU can forward > > much more than the G1 even though the G2 "shows" higher CPU > > in the output. > > > > That has confused a lot of folks and understandably so. > > > > Rodney > > > > > > > > On Wed, Feb 20, 2008 at 03:12:27PM +0100, Philippe Strauss wrote: > > > Hello c-nsp, > > > > > > We are running c7200 vxr with NPE-G2, but are seeing way to high CPU > > > usage (85%) at only 225kPPS in+out. > > > > > > It _seems_ it's due to the fact we're using a POS interface. > > > I _guess_, the G2, when using GigE interface, is doing a mixed > > > interrupt/polling mode for processing each packets. > > > (like linux NAPI: above a certain PPS value, the driver switch > > > from interrupt to polling mode). It's a guess. > > > > > > But the CPU usage is for sure much lower when using only the 3 GigE > > > embeded on the mainboard. > > > > > > Keeping interrupt only processing for POS, which may be used > > > to switch voice traffic, has some rational behind it. > > > > > > But we're using it only to switch data/ip, and I'm wondering > > > if there's a way to lower the CPU usage despite using POS? > > > > > > like a switch to enable mixed interrupt/polling driver on the POS? > > > > > > would be highly helpfull. > > > > > > regards. > > > > > > -- > > > Philippe Strauss > > > av. de Beaulieu 25 > > > 1004 Lausanne > > > http://philou.ch > > > _______________________________________________ > > > cisco-nsp mailing list [email protected] > > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
