predict performance on other machine
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From: adirtymindisajoyforever on 5 Jul 2010 02:32 Hi, I have a mainly CPU bound application that performs X good_things/ second on a V490, I would like to predict the number when executed on a T5220? Or in general, is there kinda formula to convert from one sparc type machine to another? What if the number of CPU's is not the same? Thanks in advance for all answers.
From: hume.spamfilter on 5 Jul 2010 08:20 adirtymindisajoyforever <getridofthespam(a)yahoo.com> wrote: > I have a mainly CPU bound application that performs X good_things/ > second on > a V490, I would like to predict the number when executed on a T5220? > Or in general, is there kinda formula to convert from one sparc type > machine > to another? In general, no. You can get a VERY rough estimate by comparing clock rates. But depending on operations, other things may matter... like floating-point ops, memory accesses, and so on. > What if the number of CPU's is not the same? ("CPUs", no apostrophe...) That'll only make a big difference if your app is multithreaded, which you haven't specified, so I'm assuming not. If not, it may make some small difference by virtue of the fact of how much contention there is for the CPUs relative to the other machine. -- Brandon Hume - hume -> BOFH.Ca, http://WWW.BOFH.Ca/
From: Bill Waddington on 5 Jul 2010 08:43 On Mon, 5 Jul 2010 12:20:41 +0000 (UTC), hume.spamfilter(a)bofh.ca wrote: >("CPUs", no apostrophe...) My friend, that ship has sailed. On the interweb, all words ending in "s" require an apostrophe. I confess, though, that I haven't seen "hi's" or "her's" yet. Soon, I suspect. Bill -- William D Waddington william.waddington(a)beezmo.com "Even bugs...are unexpected signposts on the long road of creativity..." - Ken Burtch
From: Thommy M. on 5 Jul 2010 08:45 adirtymindisajoyforever <getridofthespam(a)yahoo.com> writes: > Hi, > > I have a mainly CPU bound application that performs X good_things/ > second on > a V490, I would like to predict the number when executed on a T5220? > Or in general, is there kinda formula to convert from one sparc type > machine > to another? > What if the number of CPU's is not the same? The best of the two are these: V490 UltraSPARC IV+ 2.1GHz 32MB L2 Cache & 4 CPU/8 Cores T5220 UltraSPARC T2 1.6GHz 4MB L2 Cache & 1 CPU/8 Cores I would say that the V490 is doing better on pure CPU bound tasks and I would replace it with a M4000 SPARC64 VII 2.53GHz 5.5MB L2 Cache & 2 CPU/8 Cores with the possibility to expand. But if tha app is threading, then the T5220 might be enough. There's a tool, cooltst, here http://cooltools.sunsource.net/cooltst/index.html that might help you.
From: Thommy M. on 5 Jul 2010 08:47
Bill Waddington <william.waddington(a)beezmo.com> writes: > On Mon, 5 Jul 2010 12:20:41 +0000 (UTC), hume.spamfilter(a)bofh.ca > wrote: > > >>("CPUs", no apostrophe...) > > My friend, that ship has sailed. > > On the interweb, all words ending in "s" require an apostrophe. > > I confess, though, that I haven't seen "hi's" or "her's" yet. Soon, > I suspect. We've seen a couple of "it's" for "its" though... ;) |