Re: Normal CPU usage with a PPP connection
On Sunday 24 February 2008 14:34:37 Dylan Smith wrote: Hey guys, i'm running 6.3-R with (i think) userland ppp to connect to my ADSL provider over PPPoE. I build a number of graphs(mrtg) for system stats and i am noticing that under heavy load on my ppp connection, that is sustained 150KB/s for an hour or so my cpu usage, based on my graph, hovers around 20% (haven't looked at it in top yet but if there isn't a simple solution/reason for this i will look into what sort of usage it is). You should check top and tcpdump, it might be a big number of small packets causing the load. The box is a home router/server so at any 1 time isn't doing anything else that i can see would account for this. I also noticed that this usage increase does not occur with traffic coming/going on the inward facing interface, which regularly has transfer speeds around 10 MB/s. I'm running a AMD X2 3800+ with 2GB ram. Is this sort of usage normal? Can't really tell if it's normal, but it is known that userland ppp uses much resources. I have seen it too using 20% CPU time running on a much slower machine(I faintly remember that it was a Pentium Celeron at 300MHz) and a much slower(384/128?) ADSL line. Is there something i can do to bring it down? Fortunately yes, you could use net/mpd. The CPU load then, will probably be near zero for normal traffic, the 150KB/s you mention. If a million of small packets arrive at your router the load will be higher, nevertheless orders of magnitude lower than the load caused by userland ppp. HTH, Nikos ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: Normal CPU usage with a PPP connection
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Nikos Vassiliadis Sent: Tuesday, February 26, 2008 1:49 AM To: freebsd-questions@freebsd.org Cc: Dylan Smith Subject: Re: Normal CPU usage with a PPP connection On Sunday 24 February 2008 14:34:37 Dylan Smith wrote: Hey guys, i'm running 6.3-R with (i think) userland ppp to connect to my ADSL provider over PPPoE. I build a number of graphs(mrtg) for system stats and i am noticing that under heavy load on my ppp connection, that is sustained 150KB/s for an hour or so my cpu usage, based on my graph, hovers around 20% (haven't looked at it in top yet but if there isn't a simple solution/reason for this i will look into what sort of usage it is). You should check top and tcpdump, it might be a big number of small packets causing the load. The box is a home router/server so at any 1 time isn't doing anything else that i can see would account for this. I also noticed that this usage increase does not occur with traffic coming/going on the inward facing interface, which regularly has transfer speeds around 10 MB/s. I'm running a AMD X2 3800+ with 2GB ram. Is this sort of usage normal? Can't really tell if it's normal, but it is known that userland ppp uses much resources. I have seen it too using 20% CPU time running on a much slower machine(I faintly remember that it was a Pentium Celeron at 300MHz) and a much slower(384/128?) ADSL line. Is there something i can do to bring it down? Fortunately yes, you could use net/mpd. The CPU load then, will probably be near zero for normal traffic, the 150KB/s you mention. If a million of small packets arrive at your router the load will be higher, nevertheless orders of magnitude lower than the load caused by userland ppp. Or, you can ignore it? You still have 80% of the CPU doing nothing Ted ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Normal CPU usage with a PPP connection
Hey guys, i'm running 6.3-R with (i think) userland ppp to connect to my ADSL provider over PPPoE. I build a number of graphs(mrtg) for system stats and i am noticing that under heavy load on my ppp connection, that is sustained 150KB/s for an hour or so my cpu usage, based on my graph, hovers around 20% (haven't looked at it in top yet but if there isn't a simple solution/reason for this i will look into what sort of usage it is). The box is a home router/server so at any 1 time isn't doing anything else that i can see would account for this. I also noticed that this usage increase does not occur with traffic coming/going on the inward facing interface, which regularly has transfer speeds around 10 MB/s. I'm running a AMD X2 3800+ with 2GB ram. Is this sort of usage normal? Is there something i can do to bring it down? Dylan ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
