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GNU Parallel: Difference between revisions
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This table shows that choosing the right block size has a real impact on the efficiency and the number of cores actually used. | |||
The first line shows that the block size is too small, resulting in many jobs dispatched over the available cores. | The first line shows that the block size is too small, resulting in many jobs dispatched over the available cores. | ||
The second line is a better block size, since it results in a number of jobs close to the number of available cores. | The second line is a better block size, since it results in a number of jobs close to the number of available cores. | ||
The third line shows that the block size is too big and that we are only using 1 core out of 8, therefore inefficiently processing chunks. | |||
Finally, the last line shows that in many cases, letting GNU Parallel adapt and decide the block size is often faster. | Finally, the last line shows that in many cases, letting GNU Parallel adapt and decide on the block size is often faster. | ||
==Related topics== <!--T:14--> | ==Related topics== <!--T:14--> | ||