Date: Thu, 13 Oct 2011 21:28:57 +0530 From: "Jayachandran C." <jchandra@freebsd.org> To: Adrian Chadd <adrian@freebsd.org> Cc: Kostik Belousov <kostikbel@gmail.com>, Alexander Motin <mav@freebsd.org>, freebsd-mips@freebsd.org Subject: Re: svn commit: r225892 - head/sys/mips/mips Message-ID: <CA%2B7sy7Bh3KxOnLoPfWP_3QGN2F4WExLDfeMeoTLqRb3RCWT6PA@mail.gmail.com> In-Reply-To: <CAJ-VmomYcmua1cUb6F-U3VOHjAfzr19COB5at=jd-4f=mt3agg@mail.gmail.com> References: <CA%2B7sy7BiRvTB79H9=y%2BS4jQ=%2BboW1bcDJn%2BBULMmJU9KLLVJ5A@mail.gmail.com> <CAJ-VmokAsDpjJLt%2BVJ2gDGX%2BiMAwZvL2TPaaAD_LRm-Yyquxig@mail.gmail.com> <CA%2B7sy7D6h5a08Q6yNfX6xSqwabDLzE5GLu5aV3fCMYQKn_4AoQ@mail.gmail.com> <CAJ-Vmon32cVEVvC=3WJVmDkCUdyLWyec3sqU-ifzspVSPxedfg@mail.gmail.com> <CAJ-Vmomsq5PQzbCBmWob5juB9EqdcEoYV%2B9vwYjnJQYTo_%2B4kw@mail.gmail.com> <CAJ-Vmon_a_zLZmEGqwFaYaobjYFE2i1u2Viq3QD5dw4wpNNURA@mail.gmail.com> <CA%2B7sy7DFCMxo-2bJwBJcSEJf7ewG7Y=XwdgKXkhpRyDXQpvsYA@mail.gmail.com> <CAJ-VmokPFqS2oNWZ_mFSxy=0MXfgqtOcBHSQe%2BdYXvsLHAyGjQ@mail.gmail.com> <CAJ-VmomqmKPRHBCbt46_xXD0VoU47Q-vYWbAqCFaM635ZnOHWA@mail.gmail.com> <CAJ-VmomLbueaG3bmnT0WfeKaMSyXSNo80BWXqEe39z6x%2Bx8QoA@mail.gmail.com> <20111002110331.GF1511@deviant.kiev.zoral.com.ua> <CA%2B7sy7A%2Bq_N6Hr%2B3-tD=BJxmqtDgBeWF9HJCtopLF0RUz6hVyw@mail.gmail.com> <CA%2B7sy7Ax9SXSK1CyxuBNboktJxuQTMiu3D4NFmZSoq7-ipoQgA@mail.gmail.com> <CA%2B7sy7Cin5-cHcP-8_qYGhpEnAN9gw6S5ekXYK6Q3X9FREQggA@mail.gmail.com> <CAJ-VmokSNa%2BBSxeO=s%2BLrNE%2BnMD8_b4Yx51i_5E%2B8K2nkrxRsw@mail.gmail.com> <CAJ-VmomYcmua1cUb6F-U3VOHjAfzr19COB5at=jd-4f=mt3agg@mail.gmail.com>
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Hi Adrian, On Tue, Oct 4, 2011 at 9:48 PM, Adrian Chadd <adrian@freebsd.org> wrote: > On 4 October 2011 23:48, Adrian Chadd <adrian@freebsd.org> wrote: >> Hi all, >> >> I've tried jc's patch. The hand-wavy, brief summary when tested on my >> hostap (mips): >> >> * when doing single-stream, one way TCP tests (where it thus needs >> TX/RX traffic to occur), I get 100% CPU utilisation - 50% interrupt, >> 50% system, but the total interrupt rate isn't too high. It's much >> higher than without his patch. I'll go digging later to see what's >> going on. > > This turns out to be my fault. I seem to have somehow messed up > something in one of my more recent commits. > I'm quite certain that it won't have any impact on the results, as I > never see the interrupt latency issue with bidirectional traffic. > > The UDP results are correct though - jc's stuff hasn't entirely fixed > it. I'll do some more testing tomorrow morning and report what I find. I'm thinking of checking in this patch so that it gets wider testing. Did you get a chance to do the tests? The patch does not cause any further problems for me on XLR/XLP - I have been testing it for a few days. But I don't really have a testcase for the issue you see. JC.
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