see what causes ASIO spikes

Found 2 articles on how to check which is causing these ASIO spikes within your DAW:
Xperf:
1. http://www.windowsitpro.com/print/performance/examining-xperf.aspx
2. http://blogs.technet.com/b/askperf/archive/2008/06/27/an-intro-to-xperf.aspx

LatencyMon:
http://www.resplendence.com/latencymon