custom K64 device failed to flood ping

[David_Wu]

I have an issue on a custom K64 board - when doing flood ping to it, it stopped responding after few seconds.

The tools I use: KDS 2.0.0, KSDK 1.1.0 on windows.

I tried to debug and get some info from the ENET_get_stats() it did not show me any error. Further testing shows me that

once it stopped, the total received packages keep increasing but total sent did not increase.

My questions are: does anyone notice the same issue on any K64 board or it is just me? How do I debug in this case? I suspect it may be related to TCPIP_task() not schedule the Ping reply.

[David_Wu]

updates: I disabled my extra tasks(mDns, NTP, Telnet, I2C, etc.), just run the minimum threads below - it seemed no issue at all. So I will add back my other task and see how it reacts.

SIZE	USED	TASK ID	NAME
00001488(000005D0)	00000740(000002E4)   00010001	WATCHDOG service
00000320(00000140)	00000124(0000007C)   00010002	_mqx_idle_task
00001328(00000530)	00000956(000003BC)   00010003	Main
00001584(00000630)	00001244(000004DC)   00010004	TCP/IP

[David_Wu]

The reason for the failure is because I have a IRQ (DMA) at priority level 3. The timer IRQ priority is 4 for K64 in MQX. Even though I changed to use 3 for the timer it still fails. But change to 4 for both then it works.

Now here comes the question: Why IRQ priority 3 does not work on K64? (it worked on K60).