[Beowulf] Large Dell, odd IO delays

[Christopher Samuel]

On 15/02/18 09:26, David Mathog wrote:

> Sometimes for no reason that I can discern an IO operation on this 
> machine will stall.  Things that should take seconds will run for 
> minutes, or at least until I get tired of waiting and kill them.
> Here is today's example:
> 
> gunzip -c largeFile.gz > largeFile

Does "perf top -p ${PID}" show anything useful about where the
processes is spending its time?

Good luck!
Chris