原始文献 / 论坛帖 / Re: 4 hashes parallel on SSE2 CPUs for 0.3.6
Re: 4 hashes parallel on SSE2 CPUs for 0.3.6
Bitcointalk · 2010-08-12 22:07:23 UTC
速度差这么大，达到 4 倍或 6 倍，感觉很可能是老芯片对某个特定指令或弱项处理很慢。除非是 i5 的卖点：他们把 SSE2 做快了 6 倍。
快速总结：
Xeon Quad 慢 41%
Core 2 Duo 慢 55%
Core 2 Duo 持平（vess）
Core 2 Quad 慢 50%
Core i5 快 200%（nelisky）
Core i5 快 100%（vess）
AMD Opteron 快 105%
aceat64：
我的系统从 ~7100 降到了 ~4200。
这台机器是双 Intel Xeon 四核 CPU（E5335）@ 2.00GHz。
impossible7：
在 Intel Core 2 Duo T7300、x86_64 linux 上，比原版（r121）慢了 55%。
nelisky：
我的 Core2Quad（Q6600）慢了 50%，
我的 i5 快了约 200%。
impossible7：
在 AMD Opteron 2374 HE、x86_64 linux 上，我得到了 105% 的提升（！）
英文原文
That big of a difference in speed, by a factor of 4 or 6, feels like it's likely to be some quirky weak spot or instruction that the old chip is slow with. Unless it's a touted feature of the i5 that they made SSE2 six times faster.
A quick summary:
Xeon Quad 41% slower
Core 2 Duo 55% slower
Core 2 Duo same (vess)
Core 2 Quad 50% slower
Core i5 200% faster (nelisky)
Core i5 100% faster (vess)
AMD Opteron 105% faster
aceat64:
My system went from ~7100 to ~4200.
This particular system has dual Intel Xeon Quad-Core CPUs (E5335) @ 2.00GHz.
impossible7:
on an Intel Core 2 Duo T7300 running x86_64 linux it was 55% slower compared to the stock version (r121)
nelisky:
My Core2Quad (Q6600) slowed down 50%,
my i5 improved ~200%,
impossible7:
on an AMD Opteron 2374 HE running x86_64 linux I got a 105% improvement (!)