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Date:      Fri, 22 Sep 2023 13:00:56 +0200
From:      John Hay <john@sanren.ac.za>
To:        freebsd-drivers@freebsd.org
Subject:   debugging a msi interrupt panic
Message-ID:  <CAGv8uapeZ2VaBAsf76FAk-335o5FDw935qd1JTjDEEArH7s6tA@mail.gmail.com>

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--0000000000008eedcc0605f086ba
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Hi,

How do one debug msi interrupts on FreeBSD when writing a device driver?

I'm writing a driver for a OCP TimeCard. The card has several different
functions, each "tied" to a specific msi interrupt. So it would be useful
to use multiple msi interrupts. The PCIe functionality is a Xilinx AXI PCIe
blob, with 32 MSI interrupts. It does not have MSI-X capability.

<snip>
# pciconf -lbc none1@pci0:1:0:0:
none0@pci0:1:0:0: class=0x058000 rev=0x00 hdr=0x00 vendor=0x1d9b
device=0x0400 subvendor=0x10ee subdevice=0x0007
    bar   [10] = type Memory, range 32, base 0xf4000000, size 33554432,
enabled
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    cap 05[48] = MSI supports 32 messages, 64 bit
    cap 10[60] = PCI-Express 2 endpoint max data 256(256) NS
                 max read 512
                 link x1(x1) speed 2.5(2.5) ASPM disabled(L0s)
    ecap 0003[100] = Serial 1 0000000000000000
</snip>

Currently in attach, I'm doing the following (error checking removed):

<snip>
pci_enable_busmaster(dev); /* msi irq needs it enabled, at least for the
AXI core */
sc->sc_msi = pci_msi_count(dev);
pci_alloc_msi(dev, &sc->sc_msi)
loop for each function /* currently just a single iteration to get one
function working */
   port->pp_irid = port->intr_num + 1; /* msi irq no starts at one */
   port->pp_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, &port->pp_irid,
RF_ACTIVE | RF_SHAREABLE);
   bus_setup_intr(dev, port->pp_ires, INTR_TYPE_TTY | INTR_MPSAFE,
timecard_intr, NULL, port, &port->p_ihandle)
</snip>

I did define a variable timecard_intr_count that timecard_intr() should
increment, but it does not change, so timecard_intr() probably does not get
called.

Here is the console output of the panic and a show apic and show lapic. The
driver is not compiled in, but loaded later manually.

<snip>
pci0: driver added
found-> vendor=0x8086, dev=0x1e3a, revid=0x04
        domain=0, bus=0, slot=22, func=0
        class=07-80-00, hdrtype=0x00, mfdev=1
        cmdreg=0x0006, statreg=0x0010, cachelnsz=0 (dwords)
        lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
        intpin=a, irq=16
        powerspec 3  supports D0 D3  current D0
        MSI supports 1 message, 64 bit
pci0:0:22:0: reprobing on driver added
timecard0: TimeCard Probe
Vendor ID : 0x8086
Device ID : 0x1e3a
pci1: driver added
found-> vendor=0x1d9b, dev=0x0400, revid=0x00
        domain=0, bus=1, slot=0, func=0
        class=05-80-00, hdrtype=0x00, mfdev=0
        cmdreg=0x0002, statreg=0x0010, cachelnsz=16 (dwords)
        lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
        powerspec 3  supports D0 D3  current D0
        MSI supports 32 messages, 64 bit
pci0:1:0:0: reprobing on driver added
timecard0: TimeCard Probe
Vendor ID : 0x1d9b
Device ID : 0x400
We've got the TimeCard, probe successful!
timecard0: TimeCard Probe
Vendor ID : 0x1d9b
Device ID : 0x400
We've got the TimeCard, probe successful!
timecard0: <TimeCard> mem 0xf4000000-0xf5ffffff at device 0.0 on pci1
TimeCard Attach for : deviceID : 0x4001d9b
Address of timecard_intr_count 0xffffffff8314e400
timecard0: attempting to allocate 32 MSI vectors (32 supported)
msi: routing MSI IRQ 38 to local APIC 4 vector 80
msi: routing MSI IRQ 39 to local APIC 4 vector 81
msi: routing MSI IRQ 40 to local APIC 4 vector 82
msi: routing MSI IRQ 41 to local APIC 4 vector 83
msi: routing MSI IRQ 42 to local APIC 4 vector 84
msi: routing MSI IRQ 43 to local APIC 4 vector 85
msi: routing MSI IRQ 44 to local APIC 4 vector 86
msi: routing MSI IRQ 45 to local APIC 4 vector 87
msi: routing MSI IRQ 46 to local APIC 4 vector 88
msi: routing MSI IRQ 47 to local APIC 4 vector 89
msi: routing MSI IRQ 48 to local APIC 4 vector 90
msi: routing MSI IRQ 49 to local APIC 4 vector 91
msi: routing MSI IRQ 50 to local APIC 4 vector 92
msi: routing MSI IRQ 51 to local APIC 4 vector 93
msi: routing MSI IRQ 52 to local APIC 4 vector 94
msi: routing MSI IRQ 53 to local APIC 4 vector 95
msi: routing MSI IRQ 54 to local APIC 4 vector 96
msi: routing MSI IRQ 55 to local APIC 4 vector 97
msi: routing MSI IRQ 56 to local APIC 4 vector 98
msi: routing MSI IRQ 57 to local APIC 4 vector 99
msi: routing MSI IRQ 58 to local APIC 4 vector 100
msi: routing MSI IRQ 59 to local APIC 4 vector 101
msi: routing MSI IRQ 60 to local APIC 4 vector 102
msi: routing MSI IRQ 61 to local APIC 4 vector 103
msi: routing MSI IRQ 62 to local APIC 4 vector 104
msi: routing MSI IRQ 63 to local APIC 4 vector 105
msi: routing MSI IRQ 64 to local APIC 4 vector 106
msi: routing MSI IRQ 65 to local APIC 4 vector 107
msi: routing MSI IRQ 66 to local APIC 4 vector 108
msi: routing MSI IRQ 67 to local APIC 4 vector 109
msi: routing MSI IRQ 68 to local APIC 4 vector 110
msi: routing MSI IRQ 69 to local APIC 4 vector 111
timecard0: using IRQs 38-69 for MSI
TimeCard msi 32
rman iomem start f4000000, end f5ffffff, size 2000000
timecard_corelist_read did not find list, using fb list 1
nports 1
Start with uart 0 0
irq 41, irid 4


Fatal trap 30: reserved (unknown) fault while in kernel mode
cpuid = 2; apic id = 04
port irq rid 4
instruction pointer     = 0x20:0xffffffff804dda2d
stack pointer           = 0x28:0xfffffe001b1d8de0
TimeCard device loaded.
pci2: driver added
pci3: driver added
pci4: driver added
frame pointer           = 0x28:0xfffffe001b1d8e10
code segment            = base 0x0, limit 0xfffff, type 0x1b
pci5: driver added
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, IOPL = 0
current process         = 11 (idle: cpu2)
trap number             = 30
panic: reserved (unknown) fault
cpuid = 2
time = 1695375919
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfffffe001b1d8c00
vpanic() at vpanic+0x151/frame 0xfffffe001b1d8c50
panic() at panic+0x43/frame 0xfffffe001b1d8cb0
trap_fatal() at trap_fatal+0x387/frame 0xfffffe001b1d8d10
calltrap() at calltrap+0x8/frame 0xfffffe001b1d8d10
--- trap 0x1e, rip = 0xffffffff804dda2d, rsp = 0xfffffe001b1d8de0, rbp =
0xfffffe001b1d8e10 ---
acpi_cpu_idle() at acpi_cpu_idle+0x28d/frame 0xfffffe001b1d8e10
cpu_idle_acpi() at cpu_idle_acpi+0x4d/frame 0xfffffe001b1d8e30
cpu_idle() at cpu_idle+0xac/frame 0xfffffe001b1d8e50
sched_idletd() at sched_idletd+0x4b1/frame 0xfffffe001b1d8ef0
fork_exit() at fork_exit+0x80/frame 0xfffffe001b1d8f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe001b1d8f30
--- trap 0xe0c2545f, rip = 0x8f4a0c76246ffed9, rsp = 0x670c1cf091ea5e5b,
rbp = 0x57639a151e2b2985 ---
KDB: enter: panic
[ thread pid 11 tid 100005 ]
Stopped at      kdb_enter+0x37: movq    $0,0x129840e(%rip)
db> x/wx timecard_intr_count
timecard_intr_count:    0
db> show apic
Interrupts bound to lapic 0
vec 0x30 -> IRQ 9
vec 0x31 -> IRQ 28
vec 0x32 -> IRQ 31
vec 0x33 -> IRQ 24
vec 0x34 -> IRQ 29
vec 0x35 -> IRQ 30
vec 0x36 -> IRQ 8
vec 0x37 -> IRQ 16
vec 0x38 -> IRQ 36
vec 0x39 -> IRQ 1
vec 0xef -> lapic timer
Interrupts bound to lapic 2
vec 0x30 -> IRQ 25
vec 0x31 -> IRQ 33
vec 0x32 -> IRQ 23
vec 0x33 -> IRQ 18
vec 0xef -> lapic timer
Interrupts bound to lapic 4
vec 0x30 -> IRQ 26
vec 0x31 -> IRQ 0
vec 0x32 -> IRQ 34
vec 0x33 -> IRQ 37
vec 0x50 -> IRQ 38
vec 0x51 -> IRQ 39
vec 0x52 -> IRQ 40
vec 0x53 -> IRQ 41
vec 0x54 -> IRQ 42
vec 0x55 -> IRQ 43
vec 0x56 -> IRQ 44
vec 0x57 -> IRQ 45
vec 0x58 -> IRQ 46
vec 0x59 -> IRQ 47
vec 0x5a -> IRQ 48
vec 0x5b -> IRQ 49
vec 0x5c -> IRQ 50
vec 0x5d -> IRQ 51
vec 0x5e -> IRQ 52
vec 0x5f -> IRQ 53
vec 0x60 -> IRQ 54
vec 0x61 -> IRQ 55
vec 0x62 -> IRQ 56
vec 0x63 -> IRQ 57
vec 0x64 -> IRQ 58
vec 0x65 -> IRQ 59
vec 0x66 -> IRQ 60
vec 0x67 -> IRQ 61
vec 0x68 -> IRQ 62
vec 0x69 -> IRQ 63
vec 0x6a -> IRQ 64
vec 0x6b -> IRQ 65
vec 0x6c -> IRQ 66
vec 0x6d -> IRQ 67
vec 0x6e -> IRQ 68
vec 0x6f -> IRQ 69
vec 0xef -> lapic timer
Interrupts bound to lapic 6
vec 0x30 -> IRQ 27
vec 0x31 -> IRQ 32
vec 0x32 -> IRQ 35
vec 0x33 -> IRQ 4
vec 0xef -> lapic timer
db> show lapic
lapic ID = 4
version  = 1.5
max LVT  = 6
SVR      = ff (enabled)
TPR      = 00
In-service Interrupts:
isr2: 43
TMR Interrupts:
IRR Interrupts:
irr1: 32 33
irr2: 43
irr7: ef
db>
</snip>

Regards

John

--0000000000008eedcc0605f086ba
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi,</div><div><br></div><div>How do one debug msi int=
errupts on FreeBSD when writing a device driver?</div><div><br></div><div>I=
&#39;m writing a driver for a OCP TimeCard. The card has several different =
functions, each &quot;tied&quot; to a specific msi interrupt. So it would b=
e useful to use multiple msi interrupts. The PCIe functionality is a Xilinx=
 AXI PCIe blob, with 32 MSI interrupts. It does not have MSI-X capability.<=
br></div><div><br></div><div>&lt;snip&gt;<br></div><div># pciconf -lbc none=
1@pci0:1:0:0:<br>none0@pci0:1:0:0:	class=3D0x058000 rev=3D0x00 hdr=3D0x00 v=
endor=3D0x1d9b device=3D0x0400 subvendor=3D0x10ee subdevice=3D0x0007<br>=C2=
=A0 =C2=A0 bar =C2=A0 [10] =3D type Memory, range 32, base 0xf4000000, size=
 33554432, enabled<br>=C2=A0 =C2=A0 cap 01[40] =3D powerspec 3 =C2=A0suppor=
ts D0 D3 =C2=A0current D0<br>=C2=A0 =C2=A0 cap 05[48] =3D MSI supports 32 m=
essages, 64 bit <br>=C2=A0 =C2=A0 cap 10[60] =3D PCI-Express 2 endpoint max=
 data 256(256) NS<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0max read 512<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0link x1(x1) speed 2.5(2.5) ASPM disabled(L0s)<br>=C2=A0 =C2=A0=
 ecap 0003[100] =3D Serial 1 0000000000000000<br></div><div>&lt;/snip&gt;<b=
r></div><div><br></div><div>Currently in attach, I&#39;m doing the followin=
g (error checking removed):</div><div><br></div><div>&lt;snip&gt;<br></div>=
<div>pci_enable_busmaster(dev); /* msi irq needs it enabled, at least for t=
he AXI core */<br></div><div>sc-&gt;sc_msi =3D pci_msi_count(dev);</div><di=
v>pci_alloc_msi(dev, &amp;sc-&gt;sc_msi)</div><div>loop for each function /=
* currently just a single iteration to get one function working */<br></div=
><div>=C2=A0=C2=A0 port-&gt;pp_irid =3D port-&gt;intr_num + 1; /* msi irq n=
o starts at one */<br></div><div>=C2=A0=C2=A0 port-&gt;pp_ires =3D bus_allo=
c_resource_any(dev, SYS_RES_IRQ, &amp;port-&gt;pp_irid, RF_ACTIVE | RF_SHAR=
EABLE);</div><div>=C2=A0=C2=A0 bus_setup_intr(dev, port-&gt;pp_ires, INTR_T=
YPE_TTY | INTR_MPSAFE, timecard_intr, NULL, port, &amp;port-&gt;p_ihandle)<=
/div><div>&lt;/snip&gt;</div><div><br></div><div>I did define a variable ti=
mecard_intr_count that timecard_intr() should increment, but it does not ch=
ange, so timecard_intr() probably does not get called.</div><div><br></div>=
<div>Here is the console output of the panic and a show apic and show lapic=
. The driver is not compiled in, but loaded later manually.</div><div><br><=
/div><div>&lt;snip&gt;</div><div>pci0: driver added<br>found-&gt; vendor=3D=
0x8086, dev=3D0x1e3a, revid=3D0x04<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 domain=3D=
0, bus=3D0, slot=3D22, func=3D0<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 class=3D07-8=
0-00, hdrtype=3D0x00, mfdev=3D1<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 cmdreg=3D0x0=
006, statreg=3D0x0010, cachelnsz=3D0 (dwords)<br>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 lattimer=3D0x00 (0 ns), mingnt=3D0x00 (0 ns), maxlat=3D0x00 (0 ns)<br>=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 intpin=3Da, irq=3D16<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 powerspec 3 =C2=A0supports D0 D3 =C2=A0current D0<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 MSI supports 1 message, 64 bit<br>pci0:0:22:0: reprobing on d=
river added<br>timecard0: TimeCard Probe<br>Vendor ID : 0x8086<br>Device ID=
 : 0x1e3a<br>pci1: driver added<br>found-&gt; vendor=3D0x1d9b, dev=3D0x0400=
, revid=3D0x00<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 domain=3D0, bus=3D1, slot=3D0=
, func=3D0<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 class=3D05-80-00, hdrtype=3D0x00,=
 mfdev=3D0<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 cmdreg=3D0x0002, statreg=3D0x0010=
, cachelnsz=3D16 (dwords)<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 lattimer=3D0x00 (0=
 ns), mingnt=3D0x00 (0 ns), maxlat=3D0x00 (0 ns)<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 powerspec 3 =C2=A0supports D0 D3 =C2=A0current D0<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 MSI supports 32 messages, 64 bit<br>pci0:1:0:0: reprobing on =
driver added<br>timecard0: TimeCard Probe<br>Vendor ID : 0x1d9b<br>Device I=
D : 0x400<br>We&#39;ve got the TimeCard, probe successful!<br>timecard0: Ti=
meCard Probe<br>Vendor ID : 0x1d9b<br>Device ID : 0x400<br>We&#39;ve got th=
e TimeCard, probe successful!<br>timecard0: &lt;TimeCard&gt; mem 0xf4000000=
-0xf5ffffff at device 0.0 on pci1<br>TimeCard Attach for : deviceID : 0x400=
1d9b<br>Address of timecard_intr_count 0xffffffff8314e400<br>timecard0: att=
empting to allocate 32 MSI vectors (32 supported)<br>msi: routing MSI IRQ 3=
8 to local APIC 4 vector 80<br>msi: routing MSI IRQ 39 to local APIC 4 vect=
or 81<br>msi: routing MSI IRQ 40 to local APIC 4 vector 82<br>msi: routing =
MSI IRQ 41 to local APIC 4 vector 83<br>msi: routing MSI IRQ 42 to local AP=
IC 4 vector 84<br>msi: routing MSI IRQ 43 to local APIC 4 vector 85<br>msi:=
 routing MSI IRQ 44 to local APIC 4 vector 86<br>msi: routing MSI IRQ 45 to=
 local APIC 4 vector 87<br>msi: routing MSI IRQ 46 to local APIC 4 vector 8=
8<br>msi: routing MSI IRQ 47 to local APIC 4 vector 89<br>msi: routing MSI =
IRQ 48 to local APIC 4 vector 90<br>msi: routing MSI IRQ 49 to local APIC 4=
 vector 91<br>msi: routing MSI IRQ 50 to local APIC 4 vector 92<br>msi: rou=
ting MSI IRQ 51 to local APIC 4 vector 93<br>msi: routing MSI IRQ 52 to loc=
al APIC 4 vector 94<br>msi: routing MSI IRQ 53 to local APIC 4 vector 95<br=
>msi: routing MSI IRQ 54 to local APIC 4 vector 96<br>msi: routing MSI IRQ =
55 to local APIC 4 vector 97<br>msi: routing MSI IRQ 56 to local APIC 4 vec=
tor 98<br>msi: routing MSI IRQ 57 to local APIC 4 vector 99<br>msi: routing=
 MSI IRQ 58 to local APIC 4 vector 100<br>msi: routing MSI IRQ 59 to local =
APIC 4 vector 101<br>msi: routing MSI IRQ 60 to local APIC 4 vector 102<br>=
msi: routing MSI IRQ 61 to local APIC 4 vector 103<br>msi: routing MSI IRQ =
62 to local APIC 4 vector 104<br>msi: routing MSI IRQ 63 to local APIC 4 ve=
ctor 105<br>msi: routing MSI IRQ 64 to local APIC 4 vector 106<br>msi: rout=
ing MSI IRQ 65 to local APIC 4 vector 107<br>msi: routing MSI IRQ 66 to loc=
al APIC 4 vector 108<br>msi: routing MSI IRQ 67 to local APIC 4 vector 109<=
br>msi: routing MSI IRQ 68 to local APIC 4 vector 110<br>msi: routing MSI I=
RQ 69 to local APIC 4 vector 111<br>timecard0: using IRQs 38-69 for MSI<br>=
TimeCard msi 32<br>rman iomem start f4000000, end f5ffffff, size 2000000<br=
>timecard_corelist_read did not find list, using fb list 1<br>nports 1<br>S=
tart with uart 0 0<br>irq 41, irid 4<br><br><br>Fatal trap 30: reserved (un=
known) fault while in kernel mode<br>cpuid =3D 2; apic id =3D 04<br>port ir=
q rid 4<br>instruction pointer =C2=A0 =C2=A0 =3D 0x20:0xffffffff804dda2d<br=
>stack pointer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =3D 0x28:0xfffffe001b1d8d=
e0<br>TimeCard device loaded.<br>pci2: driver added<br>pci3: driver added<b=
r>pci4: driver added<br>frame pointer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=3D 0x28:0xfffffe001b1d8e10<br>code segment =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0=3D base 0x0, limit 0xfffff, type 0x1b<br>pci5: driver added<br>=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =3D DPL 0, pres 1, long 1, def32 0, gran 1<br>processor eflags =
=C2=A0 =C2=A0 =C2=A0 =C2=A0=3D interrupt enabled, IOPL =3D 0<br>current pro=
cess =C2=A0 =C2=A0 =C2=A0 =C2=A0 =3D 11 (idle: cpu2)<br>trap number =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =3D 30<br>panic: reserved (unknown) faul=
t<br>cpuid =3D 2<br>time =3D 1695375919<br>KDB: stack backtrace:<br>db_trac=
e_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe001b1d8c00<br>=
vpanic() at vpanic+0x151/frame 0xfffffe001b1d8c50<br>panic() at panic+0x43/=
frame 0xfffffe001b1d8cb0<br>trap_fatal() at trap_fatal+0x387/frame 0xfffffe=
001b1d8d10<br>calltrap() at calltrap+0x8/frame 0xfffffe001b1d8d10<br>--- tr=
ap 0x1e, rip =3D 0xffffffff804dda2d, rsp =3D 0xfffffe001b1d8de0, rbp =3D 0x=
fffffe001b1d8e10 ---<br>acpi_cpu_idle() at acpi_cpu_idle+0x28d/frame 0xffff=
fe001b1d8e10<br>cpu_idle_acpi() at cpu_idle_acpi+0x4d/frame 0xfffffe001b1d8=
e30<br>cpu_idle() at cpu_idle+0xac/frame 0xfffffe001b1d8e50<br>sched_idletd=
() at sched_idletd+0x4b1/frame 0xfffffe001b1d8ef0<br>fork_exit() at fork_ex=
it+0x80/frame 0xfffffe001b1d8f30<br>fork_trampoline() at fork_trampoline+0x=
e/frame 0xfffffe001b1d8f30<br>--- trap 0xe0c2545f, rip =3D 0x8f4a0c76246ffe=
d9, rsp =3D 0x670c1cf091ea5e5b, rbp =3D 0x57639a151e2b2985 ---<br>KDB: ente=
r: panic<br>[ thread pid 11 tid 100005 ]<br>Stopped at =C2=A0 =C2=A0 =C2=A0=
kdb_enter+0x37: movq =C2=A0 =C2=A0$0,0x129840e(%rip)<br>db&gt; x/wx timecar=
d_intr_count<br>timecard_intr_count: =C2=A0 =C2=A00<br>db&gt; show apic<br>=
Interrupts bound to lapic 0<br>vec 0x30 -&gt; IRQ 9<br>vec 0x31 -&gt; IRQ 2=
8<br>vec 0x32 -&gt; IRQ 31<br>vec 0x33 -&gt; IRQ 24<br>vec 0x34 -&gt; IRQ 2=
9<br>vec 0x35 -&gt; IRQ 30<br>vec 0x36 -&gt; IRQ 8<br>vec 0x37 -&gt; IRQ 16=
<br>vec 0x38 -&gt; IRQ 36<br>vec 0x39 -&gt; IRQ 1<br>vec 0xef -&gt; lapic t=
imer<br>Interrupts bound to lapic 2<br>vec 0x30 -&gt; IRQ 25<br>vec 0x31 -&=
gt; IRQ 33<br>vec 0x32 -&gt; IRQ 23<br>vec 0x33 -&gt; IRQ 18<br>vec 0xef -&=
gt; lapic timer<br>Interrupts bound to lapic 4<br>vec 0x30 -&gt; IRQ 26<br>=
vec 0x31 -&gt; IRQ 0<br>vec 0x32 -&gt; IRQ 34<br>vec 0x33 -&gt; IRQ 37<br>v=
ec 0x50 -&gt; IRQ 38<br>vec 0x51 -&gt; IRQ 39<br>vec 0x52 -&gt; IRQ 40<br>v=
ec 0x53 -&gt; IRQ 41<br>vec 0x54 -&gt; IRQ 42<br>vec 0x55 -&gt; IRQ 43<br>v=
ec 0x56 -&gt; IRQ 44<br>vec 0x57 -&gt; IRQ 45<br>vec 0x58 -&gt; IRQ 46<br>v=
ec 0x59 -&gt; IRQ 47<br>vec 0x5a -&gt; IRQ 48<br>vec 0x5b -&gt; IRQ 49<br>v=
ec 0x5c -&gt; IRQ 50<br>vec 0x5d -&gt; IRQ 51<br>vec 0x5e -&gt; IRQ 52<br>v=
ec 0x5f -&gt; IRQ 53<br>vec 0x60 -&gt; IRQ 54<br>vec 0x61 -&gt; IRQ 55<br>v=
ec 0x62 -&gt; IRQ 56<br>vec 0x63 -&gt; IRQ 57<br>vec 0x64 -&gt; IRQ 58<br>v=
ec 0x65 -&gt; IRQ 59<br>vec 0x66 -&gt; IRQ 60<br>vec 0x67 -&gt; IRQ 61<br>v=
ec 0x68 -&gt; IRQ 62<br>vec 0x69 -&gt; IRQ 63<br>vec 0x6a -&gt; IRQ 64<br>v=
ec 0x6b -&gt; IRQ 65<br>vec 0x6c -&gt; IRQ 66<br>vec 0x6d -&gt; IRQ 67<br>v=
ec 0x6e -&gt; IRQ 68<br>vec 0x6f -&gt; IRQ 69<br>vec 0xef -&gt; lapic timer=
<br>Interrupts bound to lapic 6<br>vec 0x30 -&gt; IRQ 27<br>vec 0x31 -&gt; =
IRQ 32<br>vec 0x32 -&gt; IRQ 35<br>vec 0x33 -&gt; IRQ 4<br>vec 0xef -&gt; l=
apic timer<br>db&gt; show lapic<br>lapic ID =3D 4<br>version =C2=A0=3D 1.5<=
br>max LVT =C2=A0=3D 6<br>SVR =C2=A0 =C2=A0 =C2=A0=3D ff (enabled)<br>TPR =
=C2=A0 =C2=A0 =C2=A0=3D 00<br>In-service Interrupts:<br>isr2: 43<br>TMR Int=
errupts:<br>IRR Interrupts:<br>irr1: 32 33<br>irr2: 43<br>irr7: ef<br>db&gt=
; <br></div><div>&lt;/snip&gt;</div><div><br></div><div>Regards</div><div><=
br></div><div>John</div><div><br></div></div>

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