Agner`s CPU blog

Software optimization resources | E-mail subscription to this blog | www.agner.org

Function libraries and tools updated
Author:  Date: 2014-10-17 17:23
Was using your great collection of test programs for microbenchmarking, really useful. Especially pmctest and timingtest.

At first stage was getting random negative readings of PMCs but then figured out that sometimes my code fragment migrates to another core and PMC readings get inconsistent, causing jumpy and misleading results, so adding notice on affinity setting and cross-core thread migration to "7.23 Why do I get negative counts?" may be helpful for people getting similar issues.

Yury

 
thread Function libraries and tools updated new - Agner - 2013-10-07
reply asmlib virus hit new - mathew boorman - 2013-11-03
replythread Function libraries and tools updated - Yury Hushchyn - 2014-10-17
last reply Function libraries and tools updated new - Agner - 2014-10-18
last replythread Function libraries and tools updated new - Andysem - 2015-03-05
last reply Function libraries and tools updated new - Agner - 2015-03-05