3 ms·
L2 cache isn't shared, at least looking at the die picture.
by TheLoneWolfling 12y ago
L2 cache isn't shared, at least looking at the die picture.
- nly 12y agoYou're right. I forgot what was being measured here.
- djcapelis 12y agoI'm not sure if it's happening here, but for what it's worth, it's not true that L2 can't be shared. On cores with hyperthreading, it's a shared resource. You can see the impact of this contention on some data generated on an i5-650 here: http://tmp.capelis.dj/2014/l2c.png http://tmp.capelis.dj/2014/l2c.png
- TheLoneWolfling 12y agoHuh. Now that I look at it, you can actually see the effects of it on the graph in the article. Look at scalability at 128k and 256k.
- djcapelis 12y agoYes, also notice how those dips show up more for even numbers of threads than odd numbers of threads. :) That system is hyperthreading.