svn commit: r333480 - head/sys/kern
Peter Holm
peter at holm.cc
Fri May 11 07:49:27 UTC 2018
On Fri, May 11, 2018 at 12:36:40AM -0700, Matthew Macy wrote:
> - How many cores? How many sockets?
> - Any special config options other than DIAGNOSTIC?
>
CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz (1995.24-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x206d7 Family=0x6 Model=0x2d Stepping=7
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x1fbee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
AMD Features2=0x1<LAHF>
XSAVE Features=0x1<XSAVEOPT>
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
TSC: P-state invariant, performance statistics
real memory = 68719476736 (65536 MB)
avail memory = 66740162560 (63648 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <INTEL W2600CR>
FreeBSD/SMP: Multiprocessor System Detected: 24 CPUs
FreeBSD/SMP: 2 package(s) x 6 core(s) x 2 hardware threads
$ sed '/^#/d; /^$/d' < /usr/src/sys/amd64/conf/PHO
include GENERIC
ident PHO-GENERIC
options ALT_BREAK_TO_DEBUGGER
options SW_WATCHDOG
options DEBUG_LOCKS
options DEBUG_VFS_LOCKS
options DIAGNOSTIC
nooptions DEADLKRES # watchdogd handles this
options UFS_EXTATTR
options UFS_EXTATTR_AUTOSTART
$
- Peter
> On Fri, May 11, 2018 at 12:29 AM, Matthew Macy <mmacy at freebsd.org> wrote:
> > Yes. Can you give me the line number for epoch_call_task+0x7b
> >
> >
> > On Fri, May 11, 2018 at 12:18 AM, Peter Holm <peter at holm.cc> wrote:
> >> On Fri, May 11, 2018 at 04:54:13AM +0000, Matt Macy wrote:
> >>> Author: mmacy
> >>> Date: Fri May 11 04:54:12 2018
> >>> New Revision: 333480
> >>> URL: https://svnweb.freebsd.org/changeset/base/333480
> >>>
> >>> Log:
> >>> epoch(9): fix priority handling, make callback lists pcpu, and other fixes
> >>>
> >>> - Lend priority to preempted threads in epoch_wait to handle the case
> >>> in which we've had priority lent to us. Previously we borrowed the
> >>> priority of the lowest priority preempted thread. (pointed out by mjg@)
> >>>
> >>> - Don't attempt allocate memory per-domain on powerpc, we don't currently
> >>> handle empty sockets (as is the case on jhibbits Talos' board).
> >>>
> >>> - Handle deferred callbacks as pcpu lists and poll the lists periodically.
> >>> Currently the interval is 1/hz.
> >>>
> >>> - Drop the thread lock when adaptive spinning. Holding the lock starves
> >>> other threads and can even lead to lockups.
> >>>
> >>> - Keep a generation count pcpu so that we don't keep spining if a thread
> >>> has left and re-entered an epoch section.
> >>>
> >>> - Actually removed the callback from the callback list so that we don't
> >>> double free. Sigh ...
> >>>
> >>> Approved by: sbruno@
> >>>
> >>> Modified:
> >>> head/sys/kern/subr_epoch.c
> >>>
> >>> Modified: head/sys/kern/subr_epoch.c
> >>> ==============================================================================
> >>> --- head/sys/kern/subr_epoch.c Fri May 11 04:47:05 2018 (r333479)
> >>
> >> Could this be yours?
> >>
> >> cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
> >> WARNING: WITNESS option enabled, expect reduced performance.
> >> WARNING: DIAGNOSTIC option enabled, expect reduced performance.
> >> Trying to mount root from ufs:/dev/da0p2 [rw]...
> >> Expensive timeout(9) function: 0xffffffff809f20d0(0xffffffff81af5140) 0.006730830 s
> >> uhub1: 4 ports with 4 removable, self powered
> >> kernel trap 12 with interrupts disabled
> >>
> >>
> >> Fatal trap 12: page fault while in kernel mode
> >> cpuid = 12; apic id = 20
> >> fault virtual address = 0x100
> >> fault code = supervisor read data, page not present
> >> instruction pointer = 0x20:0xffffffff80bb68db
> >> stack pointer = 0x0:0xfffffe00004e19b0
> >> frame pointer = 0x0:0xfffffe00004e19f0
> >> code segment = base 0x0, limit 0xfffff, type 0x1b
> >> = DPL 0, pres 1, long 1, def32 0, gran 1
> >> processor eflags = resume, IOPL = 0
> >> current process = 0 (config_0)
> >> [ thread pid 0 tid 100081 ]
> >> Stopped at epoch_call_task+0x7b: movq ll+0xdf(%rax),%rcx
> >> db> show registers
> >> cs 0x20
> >> ds 0x3b ll+0x1a
> >> es 0x3b ll+0x1a
> >> fs 0x13
> >> gs 0x1b
> >> ss 0
> >> rax 0
> >> rcx 0x858 ll+0x837
> >> rdx 0xffffffff812f6968
> >> rbx 0xc
> >> rsp 0xfffffe00004e19b0
> >> rbp 0xfffffe00004e19f0
> >> rsi 0x14
> >> rdi 0
> >> r8 0xfffff800038f3000
> >> r9 0xffffffff81ff1620 vmspace0+0x130
> >> r10 0xfffff800038f3000
> >> r11 0x40 ll+0x1f
> >> r12 0xfffffe00004e19b8
> >> r13 0xc
> >> r14 0xfffff8001f0ed400
> >> r15 0xfffff800038f3000
> >> rip 0xffffffff80bb68db epoch_call_task+0x7b
> >> rflags 0x10086
> >> epoch_call_task+0x7b: movq ll+0xdf(%rax),%rcx
> >> db> bt
> >> Tracing pid 0 tid 100081 td 0xfffff800038f3000
> >> epoch_call_task() at epoch_call_task+0x7b/frame 0xfffffe00004e19f0
> >> gtaskqueue_run_locked() at gtaskqueue_run_locked+0x139/frame 0xfffffe00004e1a40
> >> gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0x88/frame 0xfffffe00004e1a70
> >> fork_exit() at fork_exit+0x84/frame 0xfffffe00004e1ab0
> >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00004e1ab0
> >> --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
> >> db> x/s version
> >> version: FreeBSD 12.0-CURRENT #0 r333481: Fri May 11 09:08:40 CEST 2018\012 pho at t2.osted.lan:/usr/obj/usr/src/amd64.amd64/sys/PHO\012
> >> db>
> >>
> >> - Peter
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