Date: Wed, 1 Aug 2007 17:42:19 +0200 From: Patrick Proniewski <patpro@patpro.net> To: "Greg Hennessy" <Greg.Hennessy@nviz.net> Cc: freebsd-pf@freebsd.org Subject: Re: strange "throttling" issue with pf on xDSL connection Message-ID: <611A93D3-A392-493B-80ED-4C5AC77AA77A@patpro.net> In-Reply-To: <001101c7d441$0f61aa10$2e24fe30$@Hennessy@nviz.net> References: <DE71F511-8553-401A-A16C-DF4CAA5DA6E3@patpro.net> <001101c7d441$0f61aa10$2e24fe30$@Hennessy@nviz.net>
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On 01 août 2007, at 15:37, Greg Hennessy wrote: > You're possibly meeting an issue with tcp window scaling and > keeping state > on something other than Flags S/A. While playing around with systat I've discovered that the transfer rate can be as low as 20 KB/s and as high as 850 KB/s on a single download from http://test-debit.free.fr, but the mean value will always be around 120-150 KB/s when pf is active. From one sample to another (every second), the transfer rate is very erratic. If I disable pf on ext_if (set skip on $ext_if), the transfer rate reaches quickly 850 KB/s and is almost stable. It decreases to 400-450 KB/s for 1 or 2 seconds, 3 or 4 times per minute. regards, patpro
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