New optimized versions for SSE2 released

Message boards : News : New optimized versions for SSE2 released

Author	Message
Kyong Project administrator Project developer Project tester Project scientist Send message Joined: 9 Jun 12 Posts: 576 Credit: 52,667,664 RAC: 0	Message 1549 - Posted: 21 Aug 2013, 10:41:50 UTC
	There are new SSE2 optimized versions released for 32bit and 64bit linux and Windows. Radim Vančo (Kyong)
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chip Send message Joined: 1 Jun 13 Posts: 7 Credit: 0 RAC: 0	Message 1550 - Posted: 21 Aug 2013, 11:38:26 UTC
	On i7-2600K SSE2 is the same that SSE3.
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HA-SOFT, s.r.o. Project developer Project tester Send message Joined: 21 Dec 12 Posts: 176 Credit: 114,881,760 RAC: 11,110	Message 1551 - Posted: 21 Aug 2013, 12:34:46 UTC - in response to Message 1550. Last modified: 21 Aug 2013, 12:51:20 UTC
	There is a differrence in 2 or 3 basic instructions, which are replaced by couple of sse2 instructions. SSE2 version has some small improvements than older SSE3.
	ID: 1551 · Rating: 0 · rate: / Reply Quote

k3ack3r Send message Joined: 31 Jul 13 Posts: 5 Credit: 20,663,880 RAC: 0	Message 1552 - Posted: 21 Aug 2013, 17:10:50 UTC
	So is the SSE2 faster than SSE3 or is it for older computers?
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frankhagen Send message Joined: 18 Jun 12 Posts: 15 Credit: 5,027,400 RAC: 0	Message 1553 - Posted: 21 Aug 2013, 17:43:00 UTC - in response to Message 1552.
	So is the SSE2 faster than SSE3 usually this will not be the case because some design-flaws in SSE2 (which affect performance) were fixed with SSE3.
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k3ack3r Send message Joined: 31 Jul 13 Posts: 5 Credit: 20,663,880 RAC: 0	Message 1568 - Posted: 24 Aug 2013, 0:56:51 UTC
	Is AVX being planned? I have quite a few cpu's which support it... :)
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MarkJ Send message Joined: 27 Jun 12 Posts: 127 Credit: 61,093,760 RAC: 571	Message 1569 - Posted: 24 Aug 2013, 5:20:42 UTC - in response to Message 1568.
	Is AVX being planned? I have quite a few cpu's which support it... :) I saw a reply by HA SOFT that said it was actually slower than the SSE3 app. There was also discussion of AVX2 support which should be faster again, but they have yet to build such an app. ____________ BOINC blog
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HA-SOFT, s.r.o. Project developer Project tester Send message Joined: 21 Dec 12 Posts: 176 Credit: 114,881,760 RAC: 11,110	Message 1570 - Posted: 24 Aug 2013, 9:50:41 UTC - in response to Message 1568. Last modified: 25 Aug 2013, 20:00:02 UTC
	Is AVX being planned? I have quite a few cpu's which support it... :) Meanwhile, my company has bought one Intel Haswell PC with i5-4670 for testing. AVX version is better on this cpu. All other CPUs than Haswell perform better with SSE3. You can look on beta version times here: http://asteroidsathome.net/boinc/results.php?hostid=45724&offset=0&show_names=0&state=4&appid= It's pure AVX version (no AVX2 instruction). App is finished and Kyong is testing it now. The problem is a detection on boinc server side. Kyong is discussing this with boinc development. AVX needs CPU and OS support (linux kernel 2.6.30+ and win7SP1+).
	ID: 1570 · Rating: 0 · rate: / Reply Quote

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Message boards : News : New optimized versions for SSE2 released