Date: Thu, 29 Jun 1995 22:37:50 -0400 (EDT) From: "Michael C. Newell" <mnewell@lupine.nsi.nasa.gov> To: Bruce Evans <bde@zeta.org.au> Cc: hackers@freebsd.org Subject: Re: pppd eating CPU time Message-ID: <Pine.SUN.3.91.950629223247.18719A-100000@lupine.nsi.nasa.gov> In-Reply-To: <199506300208.MAA21320@godzilla.zeta.org.au>
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On Fri, 30 Jun 1995, Bruce Evans wrote: > >When I connect to it from another host (we're using both SunOS 4.1.3 and > >FreeBSD 1.1.5.1 as PPP clients) everything looks normal. However, as > >soon as we ping an interface to verify that it is up the corresponding > >ppp daemon starts using up all available CPU time. If we have two ppp > >daemons running, they split the time between them. Everything works > >correctly (albiet commands issued on the server run REAL slowly), but > >there's 0% idle time. This occurs wether or not there's data crossing > >the link. > > Do you mean ppp? It uses all the available CPU time when output is > active. No, I'm using pppd, not ijppp. It didn't take 100% of the CPU before the 2.0,5R upgrade (from 2.0R), and it doesn't on my 1.1.5.1 system... And no data is flowing across the link; it's just burning up CPU cycles. :-? TOP shows: PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND 164 mikeppp 93 0 272K 52K run 23.5H 47.07% 47.07% pppd 1063 absinthe 94 0 272K 560K run 416:08 46.73% 46.73% pppd 1619 root 40 0 420K 740K run 0:01 6.27% 3.97% top 206 root 2 -10 636K 536K sleep 17:20 0.46% 0.46% mrouted 492 root 18 0 572K 504K sleep 0:01 0.00% 0.00% tcsh 99 root 18 0 272K 120K sleep 0:07 0.00% 0.00% cron ... uninteresting stuff edited out ... "mikeppp" and "absinthe" are the two accounts dedicated to running pppd on my server. This occurs even when no other network code (e.g. mrouted) is running. Weird... Thanks, Mike +--------------------------------------+------------------------------------+ |Mike Newell | The opinions expressed herein are | |NASA Science Internet Network Systems | my own, and do not necessarily | |Sterling Software, Inc. | reflect those of the NSI program, | |MNewell@nsipo.nasa.gov | Sterling Software, NASA, or anyone | |+1-202-434-8954 | else. | +--------------------------------------+------------------------------------+ | work: http://www.eco.nsi.nasa.gov/~mnewell | | home: http://www.newell.arlington.va.us | +---------------------------------------------------------------------------+
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