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  • theblueredmonk theblueredmonk Dec 9, 2012 4:33 AM Flag

    Boston Viridis Servers

    Calxeda matched the two configurations but the Intel CPU was IO constrained and the CPU was running at 14% load. They were comparing 14% of a Sandy Bridge to their solution.
    -----

    That's the point of these ARM based servers. In any workload which is IO bound (such as a basic webserver) you rightsize the CPU to the task in had. In this case, the network port is saturated so you can't virtualize to increase CPU utilization, you have to add more (or higher bandwidth) network ports which add cost and power.

    It's worth reading Calxeda's response to Intel's response, quite funny:)

    Clearly it's still early days, and I'm looking forward to seeing full open benchmarks of whole clusters running rather than single nodes.

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    • I couldn't find the Calxeda reply to Intel. I need some more info ...

      "you rightsize the CPU to the task in hand"
      My problem is Calxeda chose a point workload that was right sized for their server and then said that the other server was not as good. To compare a workload that is tuned for your configuration and then to compare it with another system that has a different "tuned spot" is OK. They were just dishonest about computing the metrics to compare.

      Example: An older Atom D525 results on a Supermicro board yields 2100 requests per second on a dual core w/ hyperthreading.

      A Supermicro with a 1.6ghz Atom D525 CPU w/ 2 core and 2 threads measures at 2,100 requests per second. The Atom D525 is a 13W Pineview design released in Q2/2010. It operates at 1/3 the Calxeda performance and take 3x the power. It does not say where the bottleneck is or what that system configuration is other than a Supermicro X7SPF5 with a price of $199.

      The network connnection is with a Dual Intel 82574L Gigabit Ethernet Controller so I would have to assume that the Atom was CPU saturated like the Calxeda part.

      Specifications Mfr Part Number: X7SPE-HF-D525-O
      CPU: Integrated Intel Atom D525 processor(1.8GHz)
      Chipset: Intel ICH9R
      Memory: 2x 204-pin DDR3-800 SO-DIMMs Slot, Single Channel, Non-ECC, Unbuffered, Max capacity upto 4GB
      Slots: 1x PCI-Express x4 Slot (runs on x16 Slot)
      SATA: 6x SATA2 Ports, Support RAID 0, 1, 5, 10
      Video: Matrox G200eW Graphic Controller
      LAN: Dual Intel 82574L Gigabit Ethernet Controller
      Ports: 8x USB 2.0 Ports (2 rear, 5 by headers, 1 Type A connector); 2x PS/2 Ports; 2x Serial Ports (1 rear, 1 by header); 1x VGA Port; 2x RJ45 LAN Ports
      Form Factor: Proprietary, 7.5 x 6.75 inch / 19.05 x 17.15 cm
      Package: Retail
      RoHS Compliant

      • 1 Reply to alexander.dumbass
      • "you rightsize the CPU to the task in hand"
        My problem is Calxeda chose a point workload that was right sized for their server and then said that the other server was not as good. To compare a workload that is tuned for your configuration and then to compare it with another system that has a different "tuned spot" is OK. They were just dishonest about computing the metrics to compare.
        ----

        I kind of agree with you, but...

        The whole point of these 'poor cpu' servers is they are only usable for certain workloads, so you wouldn't expect Calxeda to choose a workload that highlights how poor they are:)

        The webserver example is a good use case for them, although as you point out an Atom server is a better comparison. Calxeda's numbers are for a full node (SoC, memory, network etc) so you'll need to add them to the Atom server.

 
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