URLs - Windows performance tool kits (WPR, WPA, xperf etc)

Channel 9 videos about xperf, xperfview, WPR and WPA
http://channel9.msdn.com/Events/Speakers/Michael-Milirud

Article about xperf
http://blogs.msdn.com/b/ntdebugging/archive/2008/04/03/windows-performance-toolkit-xperf.aspx

About WPR, WPA
http://blogs.msdn.com/b/ntdebugging/archive/2012/11/30/troubleshooting-pool-leaks-part-7-windows-performance-toolkit.aspx
http://blogs.technet.com/b/askpfeplat/archive/2013/03/22/troubleshooting-windows-performance-issues-using-the-windows-performance-recorder.aspx