SiSoftware Sandra 20/20/11 (2020 R11) Update – Cache Bandwidth & Latency measurements

We are pleased to release R11 (version 30.8X) update for Sandra 20/20 (2020) with the following changes:

Sandra 20/20 (2020) Press Release

Benchmark: CPU Cache & Memory Latency

  • Increased entropy for in-page & full random access patterns.
  • Worst-case latency reported not average (as used by memory bandwidth).
  • TLB optimisations for in-page random access pattern. We recommend using large (2MB) pages in order to reduce TLB effects on cache latencies.
  • Clock timing optimisations when power state fluctuates during test
  • See images (below) that illustrate how the changes affect the reported data/code cache latencies

CPU & Memory Latency – Data – In-Page Random Access

CPU & Memory Latency – Code – In-Page Random Access

Benchmark: GPGPU Cache & Memory Latency (CUDA, OpenCL, DirectX Compute)

  • Worst-case latency reported not average (as used by memory bandwidth).
  • Uses page size when reported by the GPU (4kB-4MB page size)
  • Uses 64-bit timers where available.
  • Uses cache-line size when reported by the GPU (32-256-byte line size)
  • We recommend using CUDA for most accurate (native clock timing) results.
  • See images (below) that illustrate how the changes affect the reported data cache bandwidths

CPU & Memory Bandwidth – Data

Erratas:

  • CPU Crypto Benchmark:
    • AES HWA acceleration not used when available. [30.81 fix]
    • VAES / AVX2 HWA acceleration may not be used on AMD Zen3. [20/21 fix]
    • VIA PadLock AES/SHA HWA acceleration no longer supported. [use older 30.7X]
  • GP-GPU Processing Benchmark:
    • Lower than expected aggregate score when GPU does not support FP16. [20/21 fix]
  • CPU Support:
    • No native support for AMD Zen3 due to lack of documentation. [no fix]

Reviews using Sandra 20/20:

Update & Download

Commercial version customers can download the free updates from their software distributor; Lite users please download from your favourite download site.

Download Sandra Commercial (Pro/Biz/Eng/Ent)

Download Sandra Lite

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