Related to bug 771

cnode counts.

Switch/nrt - Properly track usage of CAU and RDMA resources with multiple
tasks per compute node. Previous logic would allocate resources once per
task and then deallocate once per node, leaking CMA and RDMA resources
and preventing their use by future jobs.

On switch resource allocation failure, free partial allocation.
Failure mode was CAU could be allocated on some nodes, but not
others. The CAU allocated on nodes and switches up to the failure
point were never released.

Fix logic bugs for SchedulerParameters option of max_rpc_cnt.
Scheduling would be delayed for job arrays and
backfill scheduling would be disabled unless max_rpc_cnt > 0.

on Mixed state.

This largely reverts commit 0ec2af27
just to cut down on some logging

in it.

Signed-off-by: Danny Auble <da@schedmd.com>

Rather than treat invalid SchedulerParameters options as a fatal
error, print an error and use to the default value.

Disables job scheduling when there are too many pending RPCs

This is related to defering batch job scheduling if there
are a bunch of requests pending

rather than 1 sec interval retries

If pthread_create call fails, decrease sleep before retry from
1 sec to 0.1 sec

This also reverts commit 8cff3b08 and
ced2fa3f

slurmdbd plugin.

9368ff2d

new associations were added since it was started.

Permit multiple batch job submissions to be made for each run of the
scheduler logic if the job submissions occur at the nearly same time.
bug 616

Decrease maximimum scheduler main loop run time from 10 secs to
4 secs for improved performance.
If running with sched/backfill, do not run through all jobs on
periodic scheduling loop, but only the default depth. The
backfill scheduler can go through more jobs anyway due to its
ability to relinquish and recover locks.
See bug 616