Re: [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks
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On 05/07/2012 06:52 PM, Avi Kivity wrote:
On 05/07/2012 04:20 PM, Raghavendra K T wrote:On 05/07/2012 05:36 PM, Avi Kivity wrote:On 05/07/2012 01:58 PM, Raghavendra K T wrote:On 05/07/2012 02:02 PM, Avi Kivity wrote:On 05/07/2012 11:29 AM, Ingo Molnar wrote:This is looking pretty good and complete now - any objections from anyone to trying this out in a separate x86 topic tree?No objections, instead an Acked-by: Avi Kivity<avi@xxxxxxxxxx>[...](Less is better. Below is time elapsed in sec for x86_64_defconfig (3+3 runs)). BASE BASE+patch %improvement mean (sd) mean (sd) case 1x: 66.0566 (74.0304) 61.3233 (68.8299) 7.16552 case 2x: 1253.2 (1795.74) 131.606 (137.358) 89.4984 case 3x: 3431.04 (5297.26) 134.964 (149.861) 96.0664You're calculating the improvement incorrectly. In the last case, it's not 96%, rather it's 2400% (25x). Similarly the second case is about 900% faster.You are right, my %improvement was intended to be like if 1) base takes 100 sec ==> patch takes 93 sec 2) base takes 100 sec ==> patch takes 11 sec 3) base takes 100 sec ==> patch takes 4 sec The above is more confusing (and incorrect!). Better is what you told which boils to 10x and 25x improvement in case 2 and case 3. And IMO, this *really* gives the feeling of magnitude of improvement with patches. I ll change script to report that way :).btw, this is on non-PLE hardware, right? What are the numbers for PLE?
Sure. I 'll get hold of a PLE mc and come up with the numbers soon. but I 'll expect the improvement around 1-3% as it was in last version. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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