Date: Mon, 19 Jan 2015 21:04:31 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Hans Petter Selasky <hps@selasky.org> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r277213 - in head: share/man/man9 sys/kern sys/ofed/include/linux sys/sys Message-ID: <CAJ-VmokUJPzHqwjQT%2BRPh5afYbQnCAr1FdEUf_Z=_-OCg14ApQ@mail.gmail.com> In-Reply-To: <54BDD9E1.6090505@selasky.org> References: <201501151532.t0FFWV2Y037455@svn.freebsd.org> <CAJ-Vmok0GXZoojyi=jE=b5D-d338APztaf3Pw0_AAQ-173XSWw@mail.gmail.com> <54BDD9E1.6090505@selasky.org>
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On 19 January 2015 at 20:30, Hans Petter Selasky <hps@selasky.org> wrote:
> On 01/19/15 22:59, Adrian Chadd wrote:
>>
>> Hi,
>>
>> Would you please check what the results of this are with CPU specific
>> callwheels?
>>
>> I'm doing some 10+ gig traffic testing on -HEAD with RSS enabled (on
>> ixgbe) and with this setup, the per-CPU TCP callwheel stuff is
>> enabled. But all the callwheels are now back on clock(0) and so is the
>> lock contention. :(
>>
>> Thanks,
>>
>
> Hi,
>
> Like stated in the manual page, callout_reset_curcpu/on() does not work with
> MPSAFE callouts any more!
Hm!
How many places in the kernel did you leave like this? :P
I mean, I'm glad to have stuff be forced to be cleaned up, but you
didn't even leave a KASSERT or a debug warning that something
unsupported is being done. I'm sure I'm not going to be the first
person to be caught out like this.
> You need to use callout_init_{mtx,rm,rw} and remove the custom locking
> inside the callback in the TCP stack to get it working like before!
Would you please give me a hand with this? I've sunk a lot of (unpaid,
personal) spare time into getting the RSS stuff into shape and now a
lot of it just plainly doesn't do anything. :(
-adrian
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