Commit 676b26bb authored by Simon Marlow's avatar Simon Marlow
Browse files

comment

parent 47778c38
......@@ -284,6 +284,19 @@ unblock:
// we'll block again.
tso->why_blocked = NotBlocked;
appendToRunQueue(cap,tso);
// We used to set the context switch flag here, which would
// trigger a context switch a short time in the future (at the end
// of the current nursery block). The idea is that we have just
// woken up a thread, so we may need to load-balance and migrate
// threads to other CPUs. On the other hand, setting the context
// switch flag here unfairly penalises the current thread by
// yielding its time slice too early.
//
// The synthetic benchmark nofib/smp/chan can be used to show the
// difference quite clearly.
// cap->context_switch = 1;
}
/* ----------------------------------------------------------------------------
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment