On 2015-09-22 15:43, Sean Bruno wrote:
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On 08/26/15 14:12, Larry Rosenman wrote:
Was playing with pmcstats -S instructions -T, and got the following
when I tried to ctrl/c out.


oldtbh.lerctr.org dumped core - see /var/crash/vmcore.3

Wed Aug 26 16:05:16 CDT 2015

FreeBSD oldtbh.lerctr.org 11.0-CURRENT FreeBSD 11.0-CURRENT #18
r287033: Sun Aug 23 18:08:24 CDT 2015
r...@oldtbh.lerctr.org:/usr/obj/usr/src/sys/VT-LER  amd64

panic: [p4,700] class mismatch pd 260 != id class 4

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Unread portion of the kernel message buffer: panic: [p4,700] class
mismatch pd 260 != id class 4 cpuid = 1 KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfffffe0238744770 vpanic() at vpanic+0x189/frame
0xfffffe02387447f0 kassert_panic() at kassert_panic+0x132/frame
0xfffffe0238744860 p4_read_pmc() at p4_read_pmc+0x185/frame
0xfffffe02387448b0 pmc_stop() at pmc_stop+0x132/frame
0xfffffe02387448f0 pmc_syscall_handler() at
pmc_syscall_handler+0x1752/frame 0xfffffe0238744ae0 amd64_syscall()
at amd64_syscall+0x25d/frame 0xfffffe0238744bf0 Xfast_syscall() at
Xfast_syscall+0xfb/frame 0xfffffe0238744bf0 --- syscall (0, FreeBSD
ELF64, nosys), rip = 0x801407ffa, rsp = 0x7fffffffe588, rbp =
0x7fffffffe5a0 --- Uptime: 2d8h36m19s Dumping 3475 out of 8158
MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

Reading symbols from /boot/kernel/if_lagg.ko.symbols...done. Loaded
symbols for /boot/kernel/if_lagg.ko.symbols Reading symbols from
/boot/kernel/hwpmc.ko.symbols...done. Loaded symbols for
/boot/kernel/hwpmc.ko.symbols #0  doadump (textdump=1) at
pcpu.h:221 221  pcpu.h: No such file or directory. in pcpu.h (kgdb)
#0  doadump (textdump=1) at pcpu.h:221 #1  0xffffffff80b34ca5 in
kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:329 #2
0xffffffff80b35298 in vpanic (fmt=<value optimized out>, ap=<value
optimized out>) at /usr/src/sys/kern/kern_shutdown.c:626 #3
0xffffffff80b350c2 in kassert_panic (fmt=<value optimized out>) at
/usr/src/sys/kern/kern_shutdown.c:516 #4  0xffffffff8242ee25 in
p4_read_pmc (cpu=1, ri=12, v=0xfffff8012b206aa0) at
/usr/src/sys/modules/hwpmc/../../dev/hwpmc/hwpmc_piv.c:699 #5
0xffffffff82425102 in pmc_stop (pm=0xfffff8012b206a80) at
/usr/src/sys/modules/hwpmc/../../dev/hwpmc/hwpmc_mod.c:2741 #6
0xffffffff82423a12 in pmc_syscall_handler (td=<value optimized
out>, syscall_args=<value optimized out>) at
/usr/src/sys/modules/hwpmc/../../dev/hwpmc/hwpmc_mod.c:3923 #7
0xffffffff80f7c38d in amd64_syscall (td=0xfffff801060759a0,
traced=0) at subr_syscall.c:133 #8  0xffffffff80f5b26b in
Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:395 #9
0x0000000801407ffa in ?? () Previous frame inner to this frame
(corrupt stack?) Current language:  auto; currently minimal (kgdb)



vmcore IS available, and I *CAN* give ssh access.



Odd, can you post what CPU type you have? e.g. from my dmesg:

CPU: Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz (2400.13-MHz
K8-class CPU)
  Origin="GenuineIntel"  Id=0x206c2  Family=0x6  Model=0x2c  Stepping=2

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=0x29ee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSS
E3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,POPCNT,AESNI>
  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics
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CPU: Intel(R) Xeon(TM) CPU 3.00GHz (2992.57-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0xf43  Family=0xf  Model=0x4  Stepping=3
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=0x641d<SSE3,DTES64,MON,DS_CPL,CNXT-ID,CX16,xTPR>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  TSC: P-state invariant
real memory  = 9395240960 (8960 MB)
avail memory = 8257761280 (7875 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <PTLTD          APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 2 package(s) x 1 core(s) x 2 HTT threads



--
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: l...@lerctr.org
US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961

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