Hi,
I stumbled upon this piece of code (run-command.c:pp_collect_finish()), picking the owner of the output amongst parallel processes (introduced by Stephan Beller in commit c553c72eed64b5f7316ce227f6d5d783eae6f2ed)
/*
* Pick next process to output live.
* NEEDSWORK:
* For now we pick it randomly by doing a round
* robin. Later we may want to pick the one with
* the most output or the longest or shortest
* running process time.
*/
for (i = 0; i < n; i++)
if (pp->children[(pp->output_owner + i) % n].state == GIT_CP_WORKING)
break;
pp->output_owner = (pp->output_owner + i) % n;
Would it be useful to improve this round-robin into something smarter (as stated by the NEEDSWORK)? It seems to be only used for submodules fetch/clone.
The options would be (as said in the comment):
1 - pick the process with the longest running process time
2 - pick the process with the shortest running process time
3 - pick the process for which the output buffer is the longest
But with one of those strategies, wouldn't we lose the advantage of having the same output order as a non-parallelized version? Cf the commit message.
What do you think ?
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