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Mention that hwloc is even more strongly recommended for parallel workers

Samuel Thibault 13 years ago
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f95e043173
1 changed files with 2 additions and 1 deletions
  1. 2 1
      doc/chapters/advanced-examples.texi

+ 2 - 1
doc/chapters/advanced-examples.texi

@@ -597,7 +597,8 @@ parallel CPU implementation of the computation to be achieved. This can also be
 useful to improve the load balance between slow CPUs and fast GPUs: since CPUs
 useful to improve the load balance between slow CPUs and fast GPUs: since CPUs
 work collectively on a single task, the completion time of tasks on CPUs become
 work collectively on a single task, the completion time of tasks on CPUs become
 comparable to the completion time on GPUs, thus relieving from granularity
 comparable to the completion time on GPUs, thus relieving from granularity
-discrepancy concerns.
+discrepancy concerns. Hwloc support needs to be enabled to get good performance,
+otherwise StarPU will not know how to better group cores.
 
 
 Two modes of execution exist to accomodate with existing usages.
 Two modes of execution exist to accomodate with existing usages.