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Eiger: Difference between revisions
→Xeon Phi (Knights Landing, KNL)
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=== Xeon Phi (Knights Landing, KNL) === | === Xeon Phi (Knights Landing, KNL) === | ||
The benchmark was run on a single KNL7210 processor (256 cores) set to quadrant mode and using the MCDRAM as cache. The environment variable OMP_PROC_BIND was set to false (if this is not done, the scheduler seems to put all threads on one core). XDS was compiled with the -xMIC-AVX512 option of ifort. These benchmarks were performed with "warm" operating system cache, which means that the first run of a given type didn't count because it had to read all data from disk. | The benchmark was run on a single KNL7210 processor (256 cores) set to quadrant mode and using the MCDRAM as cache. '''The environment variable OMP_PROC_BIND was set to false, or KMP_AFFINITY set to none''' (if this is not done, the scheduler seems to put all threads on one core). XDS was compiled with the -xMIC-AVX512 option of ifort. These benchmarks were performed with "warm" operating system cache, which means that the first run of a given type didn't count because it had to read all data from disk. | ||
Deviating from the Xeon benchmark setup (above), BACKGROUND_RANGE was set to a more realistic value of 1 50 (instead of 1 9). The INIT numbers are therefore not comparable. | Deviating from the Xeon benchmark setup (above), BACKGROUND_RANGE was set to a more realistic value of 1 50 (instead of 1 9). The INIT numbers are therefore not comparable. | ||