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Date: Mon, 24 Mar 2008 05:33:29 +0200 From: Matti Aarnio <matti.aarnio@...iler.org> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org Subject: Re: O(n^2) or worse ? cat /proc/net/tcp On Sun, Mar 23, 2008 at 04:20:21PM -0700, David Miller wrote: > From: Matti Aarnio <matti.aarnio@...iler.org> > Date: Mon, 24 Mar 2008 00:43:07 +0200 > > > I have about 750 TCP socket on one multi-threaded server application, and > > about 250 on three single-threaded clients. > > > > I did observe odd slowness at first with "lsof -p .." program, then at > > "netstat -na". Same slowdown happens with: cat /proc/net/tcp > > (that 'cat' took 25 seconds...) > > > > Sure this is not earth shatterinly dangerous thing, rather a nuisance > > when a monitoring application is not as fast as one would expect. > > There have been some improvements in this area over the > past few releases. > > If you tell us what version you're running we can try to > dig out the changes that matter. Bleeding edgeish Fedora: 2.6.25-0.90.rc3.git5.fc9 #1 SMP Tue Mar 4 20:19:33 EST 2008 x86_64 x86_64 x86_64 GNU/Linux /Matti Aarnio -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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