Date: Sat, 19 Apr 2003 20:00:01 -0700 From: "Jin Guojun [NCS]" <j_guojun@lbl.gov> To: bj@dc.luth.se Cc: freebsd-performance@freebsd.org Subject: Re: patch for test (Was: tcp_output starving -- is due to mbuf get delay?) Message-ID: <3EA20D31.2606389B@lbl.gov> References: <200304191305.h3JD5S2F026929@dc.luth.se>
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Not yet. I said I will send out email when it is ready.
The problem is we have a significantly modified system based on 4.8-RC2. I tried to
extract the only
sockbut/mbuf code, but it apparently, the patch is in completed for pure 4.8 system.
Somehow, it have
some depenency of our new TCP stack.
So, I am building two new systems, one pure 4.7 and one pure 4.8. I will extract correct
patch for these
system, test them, then send out another email.
Thanks for the patient.
-Jin
Borje Josefsson wrote:
> Hmm. I'm not sure if I misunderstood if this was ready for another test
> run or not. Anyhow - I took the new patch .tgz (which, btw, still had
> tcp_input.p in it). I applied the patches (except tcp_input) and tested.
>
> Now I get:
>
> Panic: bad cur_off
> 00000 m_p 0xc0a7f400 0xc0a7f400 my_off 0 1448 cc 3407144
>
> As usual, I'm willing to test more when there are an update available.
>
> --Börje
>
> On Fri, 18 Apr 2003 13:04:24 PDT "Jin Guojun [DSD]" wrote:
>
> > Opps, there was a bad file -- tcp_input.p -- which is not working yet.
> > Also, a patch file -- tcp_usrreq.p -- was missing.
> >
> > I will take the tcp_input.p out and put tcp_usrreq.p in.
> > When it is finished, I will send another mail out.
> >
> > -Jin
> >
> > Borje Josefsson wrote:
> >
> > > On Thu, 17 Apr 2003 22:12:02 PDT "Jin Guojun [NCS]" wrote:
> > >
> > > > I have modified the sockbuf and mbuf operation to double the throughput over
> > > > high bandwidth delay product path.
> > > >
> > > > The patch is available at:
> > > > http://www-didc.lbl.gov/~jin/network/lion/content.html#FreeBSD_Patches
> > > >
> > > > The current modification is for tcp transmission only.
> > > >
> > > > I have adapted some code of uipc_socket2.c from Sam Leffler
> > > > http://www.freebsd.org/~sam/thorpe-stable.patch
> > > >
> > > > for tcp receiver, but it has not been tested yet, so the tcp_input.p is empty.
> > > >
> > > > I ignored all record chain (m_nextpkt) related code. The details is explained at
> > > >
> > > > http://www-didc.lbl.gov/~jin/network/lion/content.html#BSDMbuf
> > > >
> > > > Once the tcp_input code is tested, I will submit the patch to bugs@freebsd.org.
> > > > I may submit the patch regardless if tcp_input code works or not, because the
> > > > tcp
> > > > sender (server) is more important in high-speed network than the receiver
> > > > (client).
> > > >
> > > > It is appreciated if any one can verify the patch and provide feedback.
> > >
> > > OK. I have now tried this patch on a newly-installed 4.8R. The patch
> > > applied fine. When the sysctl net.inet.tcp.liondmask is unset, everything
> > > seems OK, but when setting it to 7 (as specified with the patch
> > > instructions) i get:
> > >
> > > Fatal trap 12: page fault while in kernel mode.
> > > (I could write down all the stuff on addresses etc if it makes sense)
> > >
> > > when I run ttcp to test the performance.
> > >
> > > This is repeatable.
> > >
> > > I'm willing to test more, if someone provides me with some hints on what
> > > to do.
> > >
> > > --Börje
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