Okay, I admit to confusion and a certain amount of defeat. I have numerous T2000 boxes and I want to see how much floating point activity is taking place on them in order to tell if I should move applications to a T2 based box.
So I go looking around. First up is the cooltst application from http://cooltools.sunsource.net/cooltst/ which I try to download. All I can get is a Zip file instead of the cooltst_v3.tar.bz2 file mentioned in the download section of the page. So the question here is how/where to get a version of cooltst that runs on a T2000? Next up is other mechanisms to get FPU info. So I go searching the web and find Darryl Gove's web page of http://blogs.sun.com/d/entry/using_dtrace_to_locate_floating that talks to using kstat and dtrace to look for 'fpu_unfinished_traps'. So I use both kstat and dtrace options that Darryl mentions and both options come up with zero (0) counts! So I start wondering about the count actually being zero and go looking some more. Then I find, http://www.informit.com/articles/article.aspx?p=1161980&seqNum=3 and read through section 4.3.8 where is mentions "One of the metrics that kstat reports is the number of emulated floating-point instructions. Not all floating-point operations are performed in hardware; some have been left to software.". So now I am wondering if there is any pure hardware based FPU transactions taking place that would NOT show up in the 'fpu_unfinished_traps' counts on a CMT T1 chip based server? And if so, how do I find out about those operations? So, the question is, lacking cooltst that I can get which is usable on a T2000, what is the full story on floating point math on a CMT and where/how can data about it's usage be gotten? My thanks for any and all help in this! pdc -- This message posted from opensolaris.org _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
