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  3. Benchmarking a distribution (and some \-O3 results) | Why Ubuntu reverted move to -O3 compiler flag

Benchmarking a distribution (and some \-O3 results) | Why Ubuntu reverted move to -O3 compiler flag

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  • that_leaflet@lemmy.worldT This user is from outside of this forum
    that_leaflet@lemmy.worldT This user is from outside of this forum
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    wrote on last edited by
    #1
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    • that_leaflet@lemmy.worldT [email protected]
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      P This user is from outside of this forum
      P This user is from outside of this forum
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      wrote on last edited by
      #2

      The processors in these were 4-core AMD EPYC Rome CPU.

      Surely they meant 48 core?

      that_leaflet@lemmy.worldT M I 3 Replies Last reply
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        The processors in these were 4-core AMD EPYC Rome CPU.

        Surely they meant 48 core?

        that_leaflet@lemmy.worldT This user is from outside of this forum
        that_leaflet@lemmy.worldT This user is from outside of this forum
        [email protected]
        wrote on last edited by
        #3

        I was wondering about that too. At first I assumed they were only allocated a few of the cores for their testing, but a typo seems more likely.

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          The processors in these were 4-core AMD EPYC Rome CPU.

          Surely they meant 48 core?

          M This user is from outside of this forum
          M This user is from outside of this forum
          [email protected]
          wrote on last edited by
          #4

          There are 4 core EPYCs (they probably make sense when PCIe lanes and memory channels are more important than raw CPU power nevermind, they actually have 16 PCIe lanes and 2 memory channels), and you don't need a very powerful machine to run benchmarks to find out how certain compiler flags affect performance.

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            The processors in these were 4-core AMD EPYC Rome CPU.

            Surely they meant 48 core?

            I This user is from outside of this forum
            I This user is from outside of this forum
            [email protected]
            wrote on last edited by
            #5

            There are 4 core romes, no idea why anyone would buy one (think they keep most of the ddr and pcie links) but still.

            M 1 Reply Last reply
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            • I [email protected]

              There are 4 core romes, no idea why anyone would buy one (think they keep most of the ddr and pcie links) but still.

              M This user is from outside of this forum
              M This user is from outside of this forum
              [email protected]
              wrote on last edited by
              #6

              That was my deleted comment, but then I realized the article specifies they are Rome CPUs, while these low cost ones are Raphael.

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