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Efficiency Footnotes


Rack Level Footnotes:

Data for the Composite Web Service study in the Efficiency campaign is based on single node performance comparisons measured and published by Ampere Computing. Performance data and the test configurations used to gather the data for each application is published on our web site. In particular, the following table shows the composition of a modeled web service based on best available data to determine scale-out behavior through projections and calculations at both Rack and Data center level. The primary applications used in this analysis are:

  1. Rack Level evaluation is based on the total performance required to scale out to 1 Rack of power budget for the Ampere® Altra® Max processors under the weighted load of the stated application composition above. Rack is based on a standard 42U rack with a total power budget of ~14kW including ~10% overhead buffer for networking, mgmt and PDU. Per server power is measured socket level power during fully loaded operation for each architecture, combined with an equivalent system level overhead for motherboard, peripheral and memory power draws. All socket power figures were measured by Ampere during live stress testing and the relative power efficiency ratings can be found at the links provided in the table above.

  2. Data Center level analysis is calculated from the rack level analysis and scaled linearly to fit a medium sized data center specification based approximately on publicly available data for the Bluffdale NSA facility in Bluffdale, UT.(1) The data center modeled is 100k ft2, where 65% of the space is reserved for the server room built on an 8 tile pitch. The total power capacity is roughly 66MW based on a PUE assumption of 1.2. More information on data center rack pitch densities can be found through a variety of publicly available analysis(2) Power savings data was calculated using an average cost of power at $0.11/kW Hour(4) and the difference between the best scaled power(Ampere) against the worst power consumption (Intel).

  3. Carbon equivalencies were calculated using the EPA equivalency calculator.(3)





If an empirical weighting (derived from direct experience in observation of some web work loads that are read heavy) is used, the per formance per rack advantage is greater because of the higher loading of the front- end tiers that utilize NGINX and Redis and which have a greater performance advantage than the backend tiers MySQL and Memcached.

Web TierApplicationPerf advantage vs Intel Xeon 8380Equal Composition WeightingEmpirical Composition WeighingComparative Performance Info Reference
Front EndNGINX3.5425%39%For Altra Max M128-26
Caching TierMemcached2.1125%8%For Altra Max M128-26
Key Value StoreRedis2.6225%39%For Altra Max M128-30
Back EndMYSQL1.6425%14%For Altra Max M128-30
Performance per Rack Weighted Advantage  2.482.80 

Device Level Footnotes:

Cost-effectiveness advantage of up to 5.4x based on Table 1.

Up to 3x more embedded compute

As shown in Table 1 [Xeon D compared to M96-28 and M128-26]

75% CPU energy reduction

As shown in Table 1 [Xeon D compared to Q32-17—with the same level of compute]

Table 1

In Table 1: Performance and usage power data are based on estimated SPECrate®2017_int_base (GCC10) with a scaling factor of 1.26 between GCC10 and OneAPI compiler as observed on Xeon 8380 and is subject to change based on system configuration and other factors. Usage Power is defined as average power consumed over time by a given workload. Ampere Altra as compared to Xeon D per

Up to 3x faster computer vision inference
In Computer Vision using SSD ResNet-50-v1 for a typical Object Detection application Ampere Altra outperforms in latency, Intel Xeon 8375C by up to 4x. See Table 2.

Table 2

Benchmarks were performed with Ampere’s internal testing software based on Ampere Model Library. This software is written entirely in Python and is in-line with MLCommons Inference (a.k.a. MLPerf) methodology of calculating latency and throughput. It utilizes API of frameworks in standard and common ways while replicating usage in real-life applications.

In case of latency benchmarks for each configuration listed below a single system process has been executed at once. Each process, following a warm-up run, has run workloads of batch size equal to 1 in loop for a minimum of 60 seconds. A final latency value has then been calculated on the basis of collected net inference time of each pass through the network.

Intel Xeon 8375C “Ice Lake” - number of threads: 1, 4, 16, 32, 64, 80

Ampere Altra Max M128-80 – number of threads: 1, 4, 16, 32, 64, 128

When it comes to the multi-process throughput benchmarks a search-space of different batch sizes and number of threads per process has been covered. Final throughput values have been estimated based on average (50th percentile) latencies observed during a 60 second multi process runs. All systems were benchmarked running workloads of following batch sizes per each of n parallel processes: [1, 4, 16, 32, 64, 128, 256]. Number of threads per process to number of processes in total was respectively:

Intel Xeon 8375C “Ice Lake” - 1x80, 2x40, 4x20, 16x5, 32x2, 64x1, 80x1

Ampere Altra Max M128-80 – number of threads: 1x128, 2x64, 4x32, 16x8, 32x4, 64x2, 128x1

Benchmarks of all platforms were run with the use of the same scripting, same datasets, same representation of models. All platforms ran the same workloads, applying identical pre- and post- processing and making uniform inference calls. In the case of fp16 Altra data, values were obtained with the use of same scripting, while AI model representations differed from their fp32 counterparts only in the precision of weights – model quantization process involved only casting to a lower float precision.

Across all systems that were put to the test, TensorFlow library was used in its best-known variant available for a given platform:

Intel CPUs – intel-optimized-tensorflow:2.12.0-pip-base and intel-optimized-pytorch:1.12.100-pip

Ampere Altra Max – amperecomputingai/tensorflow:1.6.0 (tf 2.11) amperecomputingai/pytorch:1.6.0 (pytorch 2.0.0)

All benchmarks were run with Python 3.8 in Linux-based environments of the following flavors:

Intel Xeon 8380 “Ice Lake” - Ubuntu 20.04, kernel: 5.11

AMD Epyc 7763 “Milan” - Cent OS 8, kernel: 4.18.0-305.3.1.el8.x86_64

Ampere Altra Max M128-80 – Fedora 35, kernel: 5.16.9-200.THP_NO_FIE.fc35.aarch64


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Created At : February 9th 2023, 5:12:26 pm
Last Updated At : November 28th 2023, 7:28:19 pm
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