| Study of Relative Performance Impact: Coherence Protocol vs. Network Speed |
college |
| topic: |
ECE757 (Multiprocessor Computer Architecture), Univ. of Wisconsin - Madison |
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Architects and implementors must know design trade-offs to
design successful systems. Two important aspects of
multiprocessor performance are network quality and
coherence protocol. We study the performance impact of
coherence protocol choice (MSI vs. MESI) as compared to the
performance impact of the high-speed network. A higher
quality network is either wider, or has less latency, or both.
We find that in the majority of cases, network quality
dominates the effects of coherence protocol - that is,
lower-quality networks with the MESI protocol do not yield
faster runs that higher-quality networks with the MSI
protocol. We also note that program characteristics can
affect which protocol performs better. |
| formats: |
Adobe PDF (158.9kB), PostScript (233.6kB), TeX (11.5kB)
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1998-05-01 |
quality 5 |
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