CPU Utilization

With the move to NVMe not only do we get lower latency IOs but we should also see lower CPU utilization thanks to the lower overhead protocol. To quantify the effects I used task manager to monitor CPU utilization across all four cores in a Core i7 4770K system (with HT disabled). Note that these values don't just look at the impact of the storage device, but also the CPU time required to generate the 4KB random read (QD128) workload. I created four QD32 threads so all cores are taxed and we're not limited by a single CPU core.

Total System CPU Utilization (4 x 3.5GHz Haswell Cores)

To really put these values in perspective though we need to take into account performance as well. The chart below divides total IOPS during this test by total CPU usage to give us IOPS/% CPU usage:

Platform Efficiency: IOPS per % CPU Utilization

Here all of the PCIe solutions do pretty well. The SATA based S3700 is put to shame but even the Intel SSD 910 does well here.

For the next charts I'm removing Iometer from the CPU usage calculation and instead looking at the CPU usage from the rest of the software stack:

Storage Subsystem CPU Utilization (4 x 3.5GHz Haswell Cores)

 

Platform Efficiency: IOPS per % Storage CPU Utilization

Here the 910 looks very good, it's obviously a much older (and slower) drive but it's remarkably CPU efficient. Micron's P420m doesn't look quite as good, and the SATA S3700 is certainly far less efficient when it comes to IOPS/CPU.

Mixed Read/Write Performance Power Consumption
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  • extide - Tuesday, June 3, 2014 - link

    They finally did it, a bad ass no-compromises SSD. Reply
  • extide - Tuesday, June 3, 2014 - link

    Dissappointed you didnt run the 2013 Destroyer on there, with that amazing low-queue depth performance, it will probably blow everything else away on that chart. Reply
  • smartypnt4 - Tuesday, June 3, 2014 - link

    I mean really... For $1.50/GB, this could be purchased by a desktop enthusiast, so it's completely valid to test this against other consumer drives to see how it'd do. I'd be very interested in the results. Reply
  • B3an - Tuesday, June 3, 2014 - link

    I agree, needs consumer drive comparisons... Reply
  • edward1987 - Tuesday, February 7, 2017 - link

    I found some better use for this pcie ssd drive. You can use it in qnap TVS-1282 or TDS-16489U for hot data. They do tiered storage functionality. Its £600 to get this ssd, but if you want VMs this is great. (https://www.span.com/product/Intel-SSD-DC-P3700-PC... Reply
  • TelstarTOS - Tuesday, June 3, 2014 - link

    absolutely, but wait until they have a 3600 or 3500 in their hands. Reply
  • NCM - Tuesday, June 3, 2014 - link

    It would also be useful to compare to the PCIe consumer SSD's that Apple has been shipping in the MacBook Pro, MacBook Air and iMac lines for quite some time now. Given its sales volume and early adoption of PCIe drives, I'd have to imagine that Apple may have shipped more of them to users than anyone else. (These drives are supplied by both Samsung and SanDisk, and perhaps others.)

    Yes this new Intel product is for a quite different market, but comparison is how one comes to understand what those differences are and mean.
    Reply
  • Marthisdil - Tuesday, June 3, 2014 - link

    No one really cares much about Apple's offerings. Mainly because they are such a small percentage of the Marketplace.... Reply
  • easp - Monday, June 9, 2014 - link

    You miss the point. They are one of the largest players in the consumer market. Moreover, most of their sales are a premium price points and include SSDs. Put the two together, and they almost certainly ship more consumer SSDs than any one else by far. What's more, many of their lines are already on PCIe SSDs.

    So, please explain why Apple's shipping PCIe SSD options aren't a significant point of comparison against an aftermarket SSD that just arrived in the market.
    Reply
  • SeanJ76 - Wednesday, May 20, 2015 - link

    Casue Apple is shit! Reply

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