workQPanic-Kernel work queue overflow while attempting async communication and thereafter initializing tyGSOctalModule with vxWorks

[Mrinal Bera via Tech-talk <tech-talk at aps.anl.gov>]

Hello,

While working with vxWorks 6.9.4 on MVME 3100 with TVME 200 and XM Octal modules, I get the following error whenever tried to start any asyn communication.

workQPanic: Kernel work queue overflow.

 

Exception at interrupt level:

Regs at 0x0

 

Exception at interrupt level:

data storage

Exception current instruction address: 0x0026bb84

Machine Status Register: 0x00001230

Data Exception Address Register: 0x01309ff0

Condition Register: 0x28002444

Exception Syndrome Register: 0x00800000

Regs at 0x1309f98

Press any key to stop auto-boot...

 6

After that, the system reboots automatically and then keeps showing the same error while initializing tyGSOctalModule as can be seen below:

# tyGSOctalModuleInit(char *name, charBooting mv3100...

workQPanic: Kernel work queue overflow.

 

Exception at interrupt level:

Regs at 0x0

 

Exception at interrupt level:

data storage

Exception current instruction address: 0x0026bb84

Machine Status Register: 0x00001230

Data Exception Address Register: 0x01309ff0

Condition Register: 0x28002444

Exception Syndrome Register: 0x00800000

Regs at 0x1309f98

Press any key to stop auto-boot...

 6

This error repeats on every auto reboot unless the VME crate is switched OFF and switched ON again. 

I saw a very old tech-talk thread on this error: https://epics.anl.gov/tech-talk/1999/msg00470.php

I could understand that its something to do with too many interrupts happening but couldn’t figure out how to get rid of this issue.

Here is my ipac and serial setup:

ipacAddTVME200("601fa2")

tyGSOctalDrv(2)

tyGSOctalModuleInit("UART0","232", 0x80, 0, 0)

tyGSAsynInit("serial1",  "UART0", 0, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial2",  "UART0", 1, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial3",  "UART0", 2, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial4",  "UART0", 3, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial5",  "UART0", 4, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial6",  "UART0", 5, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial7",  "UART0", 6, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial8",  "UART0", 7, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n”)

tyGSOctalModuleInit("UART1", "232", 0x81, 0, 1)

tyGSAsynInit("serial9",  "UART1", 0, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial10",  "UART1", 1, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial11",  "UART1", 2, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial12",  "UART1", 3, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial13",  "UART1", 4, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial14",  "UART1", 5, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial15",  "UART1", 6, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n")

tyGSAsynInit("serial16",  "UART1", 7, 9600, 'O', 1, 7, 'N', "\r\n", "\r\n”)

dbLoadTemplate("substitutions/asynRecord.substitutions”)

Any ideas on how to get rid of this error?

Thanks and regards,

Mrinal