IPI Benchmark Data?
dillon at backplane.com
Wed Aug 3 09:29:24 PDT 2016
I have some saved output from ./ipitest script runs that I've run on
The numbers are in nanoseconds, so e.g. '2900' would be 2.9uS. '29000'
would be 29uS. The originating cpu is #0. As an example, taking
ipitest05.txt, due to the topological layout cpu #16 is the co-thread for
cpu #0 and one can see it in the numbers (since cpu #0 is initiating the
test, it's generally not running in a low-power mode regardless of the C
state we use).
The results generally follow expectations. A cpu sitting in a deep C state
can take over 30uS to respond. Minimum IPI latency is usually in the 1-2uS
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Kernel