Expensive Intel Neighborhood,

We’d like help for an intermittent conduct of our embedded system consisting of Intel Xeon-D 1559 primarily based SBC’s operating VxWorks-7 SR640. System handles common information dimension of 1 GBytes/sec from FPGA and via PCIe switches.

SBC’s switch information to one another utilizing DMA. SBCs additionally talk through SoC PCIe gadgets like 1G/10G Ethernet, RS-232 and many others.

From VxWorks System Viewer data we notice that at intermittent intervals, all 12 cores of the CPU stay inactive, for a length of roughly 3 milliseconds or 28 milliseconds. Throughout this era not one of the system software program duties are operating even Tick Timer interrupts. It appears that evidently DMA Engine or one thing else is suspending execution and a well-defined timeout mechanism ends this example. 3 msec and 28 msec occasions are random within the order of minutes or typically hours. This conduct causes instability within the system. We can’t establish the mechanism that causes such a conduct.   

Any insights, ideas, or experience supplied can be enormously appreciated. Please be at liberty to request extra info or particulars if wanted to help in diagnosing and resolving this situation.

Thanks to your consideration and help.

Heat regards,

Embedded Engineering Group @ ASELSAN A.S.

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