Re: fixing IRQ storms (sort of solved)

At 04:47 PM 4/5/2007, Mike Tancsa wrote:

Using
http://lists.freebsd.org/pipermail/freebsd-bugs/2007-March/022753.html

I have been able to get my GPRS card to be recognized in FreeBSD. However, the IRQ it has picked, seems to conflict with the irq of the cardbus causing an interrupt storm. Is there a way to make the card use a different IRQ ? I tried ORing in PCCARD_CFE_IRQSHARE, but it doesnt seem to make a difference.


Just to followup on this thread in case others run into this problem. The card is "working" with the uart driver, but I am still getting an initial interrupt storm at boot up....


...from a boot -v snippet


Elan-mmcr driver: MMCR at 0xc5b53000.
Elan-mmcr Soekris net45xx comBIOS ver. 1.28 20050527 Copyright (C) 2000-2005
pflog0: bpf attached
lo0: bpf attached
pccard0: using CIS quirks for Sierra Wireless, AC860, 3G Network Adapter, R1
pccard0: CIS version PC Card Standard 7.0
pccard0: CIS info: Sierra Wireless, AC860, 3G Network Adapter, R1
pccard0: Manufacturer code 0x192, product 0x710
pccard0: function 1: serial port, ccr addr 700 mask 73
pccard0: function 1, config table entry 34: I/O card; irq mask 3fbc; iomask 0, iospace 3e8-3ef; io8 irqlevel
uart4: <Sierra Wireless AC860> at port 0x3e8-0x3ef irq 10 function 1 config 34 on pccard0
Interrupt storm detected on "irq10:"; throttling interrupt source
ata0-master: pio=PIO4 wdma=WDMA2 udma=UNSUPPORTED cable=40 wire
ad0: 991MB <ELITE PRO CF CARD 1GB 20070205> at ata0-master PIO4
ad0: 2030112 sectors [2014C/16H/63S] 1 sectors/interrupt 1 depth queue


And looking at vmstat -i

[datawest-soekris]# vmstat -i ;sleep 1;vmstat -i
interrupt total rate
irq0: clk 137079 993
irq4: uart0 502 3
irq8: rtc 17544 127
irq10: cbb0 uart4 128357 930
irq11: sis0 29 0
irq14: ata0 16188 117
Total 299699 2171
interrupt total rate
irq0: clk 138212 994
irq4: uart0 529 3
irq8: rtc 17689 127
irq10: cbb0 uart4 129477 931
irq11: sis0 29 0
irq14: ata0 16200 116
Total 302136 2173

Over 1,110 interrupts in one second and it will just continue that way forever..... Yet, if I then attach to the modem, all becomes OK after that ?!?!

# cu -l /dev/cuau4
Connected
ati3
Manufacturer: Sierra Wireless, Inc.
Model: AC860
Revision: U1_2_40ACAP G:/WS/FW/U1_2_40ACAP/MSM6275/SRC 2006/09/11 17:50:27
IMEI: 357806001674042
IMEI SV: 17
FSN: X171696267512
3GPP Release 5
+GCAP: +CGSM,+FCLASS,+DS
2007/04/19
09:57:29


OK

# vmstat -i ; sleep 1 ; vmstat -i
interrupt total rate
irq0: clk 252979 995
irq4: uart0 718 2
irq8: rtc 32377 127
irq10: cbb0 uart4 225905 889
irq11: sis0 86 0
irq14: ata0 16392 64
Total 528457 2080
interrupt total rate
irq0: clk 254064 996
irq4: uart0 745 2
irq8: rtc 32516 127
irq10: cbb0 uart4 225905 885
irq11: sis0 86 0
irq14: ata0 16392 64
Total 529708 2077


I also confirmed that if I set hw.intr_storm_threshold=0 in the /boot/loader.conf, the Soekris does indeed lockup after displaying the uart4 on the console.


---Mike

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