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CUBoulder-HPCPerfAnalysis / memory

Experiments with memory performance
MIT License
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added results for aaron #3

Closed AaronTHolt closed 9 years ago

jedbrown commented 9 years ago

Aaron, I was hoping to get the "theoretical peak" bandwidth for the chip in the Peak MB/s column, not just the largest measured number. AMD documentation doesn't come out and say it, but Wikipedia's table for your CPU says it can be PC2-8500 or PC3-10600. Getting information about memory channels can be obscure and depends on the OS. On Linux, you can do the following, which shows that I have two channels at 1600 MHz. 2 * 1600 * 8 = 25600 MB/s.

$ sudo dmidecode --type 17 | grep Speed
        Speed: Unknown
        Configured Clock Speed: 1600 MHz
        Speed: Unknown
        Configured Clock Speed: Unknown
        Speed: Unknown
        Configured Clock Speed: 1600 MHz
        Speed: Unknown
        Configured Clock Speed: Unknown

I think your processor has two memory channels, but I don't know what type of memory you have. I would guess 1066 MHz, leading to 2 * 1066 * 8 = 17056 MB/s theoretical peak.