[c-nsp] Cisco ASA5516-x DATAPATH-0-1648 and DATAPATH-0-1648 CPU hog

[Lee Starnes]

Hello Everyone,

I have an odd issue trying to track down. We are seeing issue whereby
traffic just "pauses" through the ASA for about 2-4 seconds before resuming.

We started seeing this when the device was low on memory (about 600M
available). we rebooted it and did an firmware update the current version.

Still seeing this behavior.

After another reboot, still seeing this.

Process:      DATAPATH-0-1665, PROC_PC_TOTAL: 407, MAXHOG: 10, LASTHOG: 5
MAXHOG At:    15:31:54 PDT Jun 4 2024
LASTHOG At:   15:37:48 PDT Jun 4 2024
PC:           0x0000000000000000 (suspend)

Process:      DATAPATH-0-1665, NUMHOG: 385, MAXHOG: 10, LASTHOG: 5
MAXHOG At:    15:31:54 PDT Jun 4 2024
LASTHOG At:   15:37:48 PDT Jun 4 2024
PC:           0x0000000000000000 (suspend)
Call stack:   0x0000564741c98c49  0x0000564742188996  0x00005647436c2d28
              0x00005647436d2abc  0x00005647436e2ae0  0x00007f2d2067bff5
              0x00007f2d1f88416f


Process:      DATAPATH-1-1666, PROC_PC_TOTAL: 402, MAXHOG: 12, LASTHOG: 5
MAXHOG At:    15:31:48 PDT Jun 4 2024
LASTHOG At:   15:37:41 PDT Jun 4 2024
PC:           0x0000000000000000 (suspend)

Process:      DATAPATH-1-1666, NUMHOG: 376, MAXHOG: 12, LASTHOG: 5
MAXHOG At:    15:31:48 PDT Jun 4 2024
LASTHOG At:   15:37:41 PDT Jun 4 2024
PC:           0x0000000000000000 (suspend)
Call stack:   0x0000564741c98c49  0x0000564742188996  0x00005647436c2d28
              0x00005647436d2abc  0x00005647436e2ae0  0x00007f2d2067bff5
              0x00007f2d1f88416f



I did disable logging flash-bufferwrap to stop it from writing to flash.
The logging process stopped using 29% CPU, but still the issue persists.

Anyone got any Ideas on what the cause is and how to resolve it?

Best,

-Lee