Hi Samuel,
On 25/03/2026 22:57, Samuel Thibault wrote:
Samuel Thibault, le sam. 14 mars 2026 23:13:55 +0100, a ecrit:
That's possible. For some memory-hungry packages I see several GB of
swap getting consumed, and little useful CPU time is spent, until the
build manages to finish, or times out.
I had a look at the vmstat. The highest memory segment had all its
inactive pages swapped out, but all the other segments had almost only
inactive pages still in. I fixed the pageing out in gnumach, to select
inactive pages from all segments before looking at activate pages. I
believe that can help a lot when the last segment is small (and thus all
the swapping happens there with almost only active pages...)
i've looked at the changes you've made and it seems to me that it should
improve the performance. Perhaps if the improvement is significant the
issue with the vm_map locking might become less common to give us more
time to fix it. I'd be very interested in an update once you've assessed
the new code in action.
Mike.
