Date: Mon, 09 Sep 2002 18:09:55 +0200 From: Andre Oppermann <oppermann@pipeline.ch> To: Harti Brandt <brandt@fokus.gmd.de> Cc: Petr Holub <hopet@ics.muni.cz>, net@FreeBSD.ORG Subject: Re: 32 bit couters in netstat Message-ID: <3D7CC7D3.55BBB7BA@pipeline.ch> References: <20020909173330.F30835-100000@beagle.fokus.gmd.de>
next in thread | previous in thread | raw e-mail | index | archive | help
Harti Brandt wrote: > > On Mon, 9 Sep 2002, Petr Holub wrote: > > PH>> > I've just found that netstat in FreeBSD 4.4 has just 32 bit couters > PH>> > (compared to 64 bit counters in NetBSD), at least for Ibytes and Obytes. > PH>> > Is there any improvement in this respect in -STABLE or in -CURRENT? > PH>> > PH>> No because certain people argue that having a 64 bit counter slows > PH>> down the machine to the level of a 386SX-16 and who needs large > PH>> counters anyway... > PH> > PH>I don't think NetBSD is slow that way ;o))). > > If you search the archives you will find the arguments. As far as I > remember the problem is to do the counter update atomically correct. Yes. Doing a 64 bit atomically add even on UP machines takes a couple a CPU cycles more. But does that matter with 2.8GHz machines? -- Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3D7CC7D3.55BBB7BA>