On Oct 24, 2006, at 9:29 PM, Peter Dimov wrote:
Howard Hinnant wrote:
I don't know how to quantify it, but there is nothing quite like the warm fuzzy of seeing this on your screen:
writ thread 1 at 62% writ thread 2 at 63% writ thread 3 at 59% writ thread 4 at 58% read thread 5 at 62% read thread 6 at 55% read thread 7 at 64% read thread 8 at 75%
You are right in principle but the above isn't a good result for a multi-core. The read threads should have an advantage proportional to the number of cores since they can run in parallel. I'll try to embelish my test with something that measures starvation.
<nod> Indeed the above snapshot was taken from a single processor machine. My memory tells me I've had similar experience with a dual core machine, maybe there was the advantage you speak of for readers, but I'm unable to verify that at the moment. Much thanks for your efforts in this area. -Howard