Hello, The credit2 scheduler currently ignores per-vcpu hard and soft affinity masks.
The first patch updates the scheduler to ensure that vcpus only run on pcpus on which they are allowed to run (hard affinity). The second patch updates the scheduler to make more informed run queue assignment decisions by considering which pcpus that vcpus prefer to run on (soft affinity). I tested this series on a NUMA machine with Dario Faggioli's "fix per-socket runqueue setup" patch series applied. Without it, the credit2 scheduler only creates one run queue, regardless of the type of machine. --- [PATCH 1/2] sched: credit2: respect per-vcpu hard affinity [PATCH 2/2] sched: credit2: consider per-vcpu soft affinity xen/common/sched_credit2.c | 419 ++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 388 insertions(+), 31 deletions(-) --- Justin Weaver, Masters candidate University of Hawaiʻi at Mānoa _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
