Date: Fri, 2 Aug 2002 19:39:24 +0200 From: Marc Recht <marc@informatik.uni-bremen.de> To: current@freebsd.org Subject: Re: mysql-3.23.51 with Current for the last few weeks. Message-ID: <20020802193924.3c73ae68.marc@informatik.uni-bremen.de> In-Reply-To: <Pine.BSF.4.21.0208021005220.47925-100000@InterJet.elischer.org> References: <20020802190041.658814fc.marc@informatik.uni-bremen.de> <Pine.BSF.4.21.0208021005220.47925-100000@InterJet.elischer.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 2 Aug 2002 10:08:47 -0700 (PDT)
Julian Elischer <julian@elischer.org> wrote:
> there are several possibilities:
> 1/ do a ktrace on teh spinning process for a couple of seconds and see
> what syscalls it is doing.
stopped jikes with ctrl-c looks always like:
90998 sh RET read 650/0x28a
90998 sh CALL fork
90998 sh RET fork 91009/0x16381
90998 sh CALL getpgrp
90998 sh RET getpgrp 90998/0x16376
90998 sh CALL wait4(0xffffffff,0xbfbff498,0x2,0)
90998 sh RET wait4 -1 errno 4 Interrupted system call
90998 sh PSIG SIGINT caught handler=0x80595b0 mask=0x0 code=0x0
90998 sh CALL sigreturn(0xbfbff2b8)
90998 sh RET sigreturn JUSTRETURN
90998 sh CALL wait4(0xffffffff,0xbfbff498,0x2,0)
90998 sh RET wait4 91009/0x16381
90998 sh CALL read(0xa,0x80f6e80,0x3ff)
90998 sh GIO fd 10 read 0 bytes
""
90998 sh RET read 0
90998 sh CALL exit(0x82)
> 2/ if it's spinning in the kernel, you can drop into ddb
> and do a
> tr <pid>
> to see where it is in the kernel...
> c to continue..
I always get these two:
Debugger("manual escape to debugger")
Stopped at Debugger+0x4d: xchgl %ebx,in_Debugger.0
db> tr 3402
mi_switch(c30f36c0,c01f23e8,c30f5cc0,f13c8d3c,c0237b5e) at mi_switch+0x15a
ithread_schedule(c30dd500,1,f13c8d3c,c79309c0,0) at ithread_schedule+0x11f
sched_ithd(5) at sched_ithd+0x43
Xintr5() at Xintr5+0x67
--- interrupt, eip = 0x80decb0, esp = 0xbfbfe4e0, ebp = 0xbfbfe548 ---
db> c
mi_switch(c30e3d40,0,5,0,800) at mi_switch+0x15a
ast(f16ddd48) at ast+0x35a
doreti_ast() at doreti_ast+0x1a
> do this several times to ge a sortof 'profile' of where you see it..
Done that.
Hope this helps. Please let me know if I could do more to find
this problem.
Marc
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020802193924.3c73ae68.marc>