Date: Mon, 17 Oct 2011 19:48:24 +0530 From: "Jayachandran C." <jchandra@freebsd.org> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-mips@freebsd.org Subject: Re: svn commit: r225892 - head/sys/mips/mips Message-ID: <CA%2B7sy7BYALEDz=OR1k-GPjOpcHP5dK8mKG-A_J5LJ2jO2R04KA@mail.gmail.com> In-Reply-To: <CA%2B7sy7Bh3KxOnLoPfWP_3QGN2F4WExLDfeMeoTLqRb3RCWT6PA@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> <CA%2B7sy7Bh3KxOnLoPfWP_3QGN2F4WExLDfeMeoTLqRb3RCWT6PA@mail.gmail.com>
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On Thu, Oct 13, 2011 at 9:28 PM, Jayachandran C. <jchandra@freebsd.org> wro= te: > 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 =A0for me on XLR/XLP - I > have been testing it for a few days. =A0But I don't really have a > testcase for the issue you see. If there are no objections, I'm planning to check this in. I can keep the two if(!busy) blocks in cpu_idle() commented if you prefer, and that should give the same behavior as you are seeing now. JC.
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