Difference between revisions of "UM version4.5 benchmarks"
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=Intel Westmere= | =Intel Westmere= | ||
| + | |||
| + | * Emerald. | ||
| + | * QDR Infiniband (non-RoCE) | ||
| + | * GCOMv3.1 | ||
| + | |||
| + | ==FAMOUS== | ||
| + | |||
| + | {| border="1" cellpadding="10" | ||
| + | || Domain Decomposition || Number of Cores || Model-years/day | ||
| + | |- | ||
| + | || 4x3 || 12 || ~313 | ||
| + | |- | ||
| + | || 6x4 || 24 || ~360 | ||
| + | |- | ||
| + | || 12x3 || 36 || ~424 | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | ==HadCM3== | ||
| + | |||
| + | {| border="1" cellpadding="10" | ||
| + | || Domain Decomposition || Number of Cores || Model-years/day | ||
| + | |- | ||
| + | || 4x3 || 12 || ~24 | ||
| + | |- | ||
| + | || 6x4 || 24 || ~40 | ||
| + | |- | ||
| + | || 12x3 || 36 || ~60 | ||
| + | |- | ||
| + | |} | ||
=Intel SandyBridge= | =Intel SandyBridge= | ||
Revision as of 15:31, 17 December 2012
Benchmarking UM Version4.5 on different Architectures
Preamble
- Cluster/Parallel file systems are often a bottleneck.
- If the model is not filesystem-bound, it is often (MPI massage) latency-bound.
- Only the master process writes output, this can lead to load-balance issues, which hinder scaling.
AMD Bulldozer
Intel Westmere
- Emerald.
- QDR Infiniband (non-RoCE)
- GCOMv3.1
FAMOUS
| Domain Decomposition | Number of Cores | Model-years/day |
| 4x3 | 12 | ~313 |
| 6x4 | 24 | ~360 |
| 12x3 | 36 | ~424 |
HadCM3
| Domain Decomposition | Number of Cores | Model-years/day |
| 4x3 | 12 | ~24 |
| 6x4 | 24 | ~40 |
| 12x3 | 36 | ~60 |
Intel SandyBridge
- Test system: Quad socket, 8-core E-4650L (2.60GHz) (L for Low power)
- 20MB L3 cache
| MPI message latency | |||
|---|---|---|---|
| 0 bytes | 128 bytes | 1024 bytes | |
| between sockets | ~0.70us | ~1.15us | ~2.0us |
FAMOUS
| Domain Decomposition | Number of Cores | Model-years/day |
| 4x2 | 8 | ~327 |
| 8x2 | 16 | ~450 |
| 8x4 | 32 | ~480 |
- The last line of this table shows a real problem scaling beyond 16 cores. Load balance?
- Would like to try to improve file writing performance and re-run.
HadCM3
| Domain Decomposition | Number of Cores | Model-years/day |
| 8x2 | 16 | ~48 |
| 8x4 | 32 | ~65 |