On 03/30/2000 07:58 +0800, Steve Underwood wrote:
>> Tim Walberg wrote:
>>
>> > On 03/29/2000 00:13 +0100, Alan Cox wrote:
>> > >> > 13: 1 XT-PIC fpu
>> > >> > 15: 234737971 XT-PIC eth0
>> > >> > NMI: 0
>> > >> >
>> > >> > Whoa! Does eth0 on Int15h raise a big flag in anyone else's
>> > >> > book?!?!?!
>> > >>
>> > >> if the second IDE is not in use its quite reasonable
>> > >>
>> > >>
>> >
>> > Actually, I'm a little more curious about the number of interrupts
>> > seen by eth0 (see my earlier reply, also)... My machine
>> > isn't **that** busy...
>>
>> A good rule ruled to be "avoid IRQ 9 like the plague". Whatever the system
>> configuration said there was still an excellent chance the video card (even a
>> PCI one) was hitting the IRQ 9 line. I think this is generally OK for cards
>> from the last couple of years.
>>
>> Alas, a similar problem still exists with IRQ15 and the second IDE controller
>> on many motherboards. If you disable the second IDE controller you often
>> still find that IRQ15 isn't usable with any reliability. Try another IRQ and
>> see what happens.
>>
Understood. However, in my setup, eth0 uses IRQ7, and I'm wondering
why it is experiencing interrupts at such a high rate, and why
the interrupts aren't more well-balanced between the CPUs. It
kinda looks like there's some correlation between IRQ0 (timer)
and IRQ7 in this case, but I'm not real sure that makes sense...
tw
Linux calvin 2.2.14-calvin #2 SMP Mon Feb 7 14:43:26 CST 2000 i686 unknown
CPU0 CPU1
0: 188954205 0 XT-PIC timer
1: 48646 150569 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
3: 471085 488604 IO-APIC-level eth1
4: 4077775 10539407 IO-APIC-edge serial
5: 1680958 2361956 IO-APIC-edge soundblaster
7: 176775804 1772381 IO-APIC-level eth0
8: 0 0 IO-APIC-edge rtc
12: 2303989 3256730 IO-APIC-edge PS/2 Mouse
13: 1 0 XT-PIC fpu
14: 3824551 4572741 IO-APIC-edge ide0
15: 4734924 6141506 IO-APIC-edge ide1
NMI: 0
ERR: 0
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Intel 82441FX Natoma (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
Bus 0, device 7, function 0:
ISA bridge: Intel 82371SB PIIX3 ISA (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable. No bursts.
Bus 0, device 7, function 1:
IDE interface: Intel 82371SB PIIX3 IDE (rev 0).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
I/O at 0xffa0 [0xffa1].
Bus 0, device 17, function 0:
VGA compatible controller: S3 Inc. Vision 968 (rev 0).
Medium devsel. IRQ 10.
Non-prefetchable 32 bit memory at 0x80000000 [0x80000000].
Bus 0, device 18, function 0:
SCSI storage controller: Adaptec AIC-7871 (rev 0).
Medium devsel. Fast back-to-back capable. IRQ 9. Master Capable. Latency=64. Min Gnt=8.Max Lat=8.
I/O at 0xec00 [0xec01].
Non-prefetchable 32 bit memory at 0xfebff000 [0xfebff000].
Bus 0, device 19, function 0:
Ethernet controller: 3Com 3C905B 100bTX (rev 48).
Medium devsel. IRQ 7. Master Capable. Latency=64. Min Gnt=10.Max Lat=10.
I/O at 0xe880 [0xe881].
Non-prefetchable 32 bit memory at 0xfebfef80 [0xfebfef80].
Bus 0, device 20, function 0:
Ethernet controller: 3Com 3C900 10bTPO (rev 0).
Medium devsel. IRQ 3. Master Capable. Latency=64. Min Gnt=3.Max Lat=8.
I/O at 0xef00 [0xef01].
-- +--------------------------+------------------------------+ | Tim Walberg | tewalberg@mediaone.net | | 828 Marshall Ct. | www.concentric.net/~twalberg | | Palatine, IL 60074 | | +--------------------------+------------------------------+
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This archive was generated by hypermail 2b29 : Fri Mar 31 2000 - 21:00:27 EST