General discussion • Re: A Pi Pie Chart

Apparently eight-socket Lenovo X3950 X6 scale-up servers are plentiful on eBay and one can get a discount by purchasing more than one. As nice as they look, I prefer unsweetened hot chocolate. Unfortunately, kittens find chocolate toxic.

Some Pi chart runs for a Lenovo X3950 with 18-core E7-8880v3 processors appear in

viewtopic.php?p=2340370#p2340370

Although that scale-up server has 144 cores, I only added a 4-core run to the Pi rate chart. For comparison similar tests for the Xeon E5-1650v3 and E5-2620v3 processors yieldedThe Lenovo is about the same speed on a core-for-core basis, but there are many more cores. Scratchy meowed that the contest was unfair and the servers on eBay come with newer Xeon E7-8890v4 processors. I'm still holding off on any purchases until the power audit is finished.

Interestingly, runs which crossed four NUMA zones to distribute four threads across four sockets only showed a 10 percent slowdown. That suggests the possibility of parallel scaling to all eight sockets.

Statistics: Posted by ejolson — Wed Oct 01, 2025 4:22 am

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