Re: ULE status, invalid load, buildkernel times.

On 7/21/07, Jeff Roberson <jroberson_at_chesapeake.net> wrote:
> I have a patch available at:
>
> http://people.freebsd.org/~jeff/ulehtt.diff
>
> This resolves issues in the code that handles HTT enabled processors and
> also adds some ULE information to bootverbose on SMP systems.  Peter Wemm
> has a seperate patch that fixes a bug where some amd64 cpus were still
> being misidentified as HTT.  Those of you with invalid loads either have
> Hyper-threading CPUs or misidentified amd cores.  You should expect
> slightly poorer performance as long as your cores are misidentified but
> the bad loads should be fixed.
>
> I also believe that the buildkernel/world times are now significantly
> improved.  If this is not the case for you please send a mail.  Any other
> performance data is appreciated.
>
> Thanks,
> Jeff
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-current system with sources update July 22 at approx. 3PM central
time with the ulehtt.diff patch applied experienced a panic this
afternoon while restarting a local Apache Tomcat server.  Backtrace
information is shown below.  Unclear to me whether or not the patch
and the panic are related.

Matt

(kgdb) mtosto-bsd# kgdb kernel.debug /var/crash/vmcore.1
[GDB will not be able to debug user-mode threads:
/usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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Unread portion of the kernel message buffer:
panic: kse_wakeup: no owner
cpuid = 1
Uptime: 23h29m24s
Physical memory: 2030 MB
Dumping 288 MB: 273 257 241 225 209 193 177 161 145 129 113 97 81 65 49 33 17 1

#0  doadump () at pcpu.h:195
195             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) bt
#0  doadump () at pcpu.h:195
#1  0xc05d57c7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2  0xc05d5abb in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3  0xc05bc398 in kse_wakeup (td=0xc5f99440, uap=0xe8787cfc)
    at /usr/src/sys/kern/kern_kse.c:536
#4  0xc0829355 in syscall (frame=0xe8787d38) at
/usr/src/sys/i386/i386/trap.c:1006
#5  0xc080f1b0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
#6  0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) list *0xc05bc398
0xc05bc398 is in kse_wakeup (/usr/src/sys/kern/kern_kse.c:537).
532                     return (ESRCH);
533             }
534             if ((td2 = ku->ku_owner) == NULL) {
535                     PROC_SUNLOCK(p);
536                     panic("%s: no owner", __func__);
537             } else if (td2->td_kflags & (TDK_KSEREL | TDK_KSERELSIG)) {
538                     if (!(td2->td_kflags & TDK_WAKEUP)) {
539                             td2->td_kflags |= TDK_WAKEUP;
540                             if (td2->td_kflags & TDK_KSEREL)
541                                     sleepq_remove(td2, &p->p_completed);
(kgdb) list *0xc0829355
0xc0829355 is in syscall (/usr/src/sys/i386/i386/trap.c:1006).
1001                    STOPEVENT(p, S_SCE, narg);
1002
1003                    PTRACESTOP_SC(p, td, S_PT_SCE);
1004
1005                    AUDIT_SYSCALL_ENTER(code, td);
1006                    error = (*callp->sy_call)(td, args);
1007                    AUDIT_SYSCALL_EXIT(error, td);
1008            }
1009
1010            switch (error) {
(kgdb) list *0xc080f1b0
0xc080f1b0 is at /usr/src/sys/i386/i386/exception.s:197.
192             pushl   %fs
193             SET_KERNEL_SREGS
194             FAKE_MCOUNT(TF_EIP(%esp))
195             pushl   %esp
196             call    syscall
197             add     $4, %esp
198             MEXITCOUNT
199             jmp     doreti
200
201     ENTRY(fork_trampoline)
(kgdb)