Date: Mon, 11 Jun 2007 19:13:47 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Dmitry Morozovsky <marck@rinet.ru> Cc: freebsd-stable@freebsd.org, Ivan Voras <ivoras@fer.hr> Subject: Re: calcru: runtime went backwards, RELENG_6, SMP Message-ID: <200706120213.l5C2DlkO055522@apollo.backplane.com> References: <20070606153542.Y76617@woozle.rinet.ru> <f46tmc$rgb$2@sea.gmane.org> <20070606231940.T91939@woozle.rinet.ru> <200706062127.l56LRYTe090137@apollo.backplane.com> <20070608111809.U97287@woozle.rinet.ru> <200706090809.l5989Mkj020033@apollo.backplane.com> <20070609163329.P4850@woozle.rinet.ru> <200706091957.l59JvDWR026822@apollo.backplane.com> <20070610175748.L88437@woozle.rinet.ru> <20070610193708.W88437@woozle.rinet.ru>
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:==============================================================================
: cs3661.rinet.ru 192.38.7.240 2 u 354 1024 377 5.305 -66314. 4321.47
: ns.rinet.ru 130.207.244.240 2 u 365 1024 377 6.913 -66316. 4305.33
: whale.rinet.ru 195.2.64.5 2 u 358 1024 377 7.939 -66308. 4304.90
:
:Any directions to debug this?
:
:Sincerely,
:D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
Since you are running on HEAD now, could you also kgdb the live kernel
and print cpu_ticks? I believe the sequence is (someone correct me if
I am wrong):
kgdb /kernel /dev/mem
print cpu_ticks
As for further tests... try building a non-SMP kernel (i.e. one that
only recognizes one cpu) and see if the problem occurs there. That
will determine whether there is a basic problem with time keeping or
whether it is an issue with SMP.
I'm afraid there isn't much more I can do to help, other then to make
suggestions on tests that you can run that will hopefully ring a bell
with another developer.
-Matt
Matthew Dillon
<dillon@backplane.com>
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