AnsweredAssumed Answered

High interrupt rate on multigpu multi cpu system but not on multigpu single cpu system

Question asked by fredriko on Oct 9, 2013
Latest reply on Oct 18, 2013 by himanshu.gautam



When running a program I developed in JavaCL It runs well on the development system which is a single cpu i7 3,5GHz machine that has 2 HD7990 cards and 2 16x pcie slots that clock down to 8x when I have 2 cards. But on the to be production system that is a dual 2,4GHz Xeon system with 3 16X pcie slots and also 2 HD7990 cards the interrupts take about 30% on each of the cores. The interrupts start when I start accessing stuff on the GPU cards, but are there even when there is no load on the GPU cards. Also the speed of the GPUS are quite a bit slower on the Xeon machine.


Is this something anyone else have seen? Do you have any ideas how to debug this?