Re: [OMPI users] Bug with Open-MPI Processor Count

2018-11-08 Thread Adam LeBlanc
Hello Ralph, Is there any update on this? Thanks, Adam LeBlanc On Fri, Nov 2, 2018 at 11:06 AM Adam LeBlanc wrote: > Hello Ralph, > > When I do the -np 7 it still fails with "There are not enough slots > available in the system to satisfy the 7 slots that were requested by the > application",

Re: [OMPI users] Latencies of atomic operations on high-performance networks

2018-11-08 Thread Joseph Schuchart
While using the mca parameter in a real application I noticed a strange effect, which took me a while to figure out: It appears that on the Aries network the accumulate operations are not atomic anymore. I am attaching a test program that shows the problem: all but one processes continuously in

Re: [OMPI users] Latencies of atomic operations on high-performance networks

2018-11-08 Thread Nathan Hjelm via users
Quick scan of the program and it looks ok to me. I will dig deeper and see if I can determine the underlying cause.What Open MPI version are you using?-NathanOn Nov 08, 2018, at 11:10 AM, Joseph Schuchart wrote:While using the mca parameter in a real application I noticed a strange effect, which t

Re: [OMPI users] Latencies of atomic operations on high-performance networks

2018-11-08 Thread Joseph Schuchart
Sorry for the delay, I wanted to make sure that I test the same version on both Aries and IB: git master bbe5da4. I realized that I had previously tested with 3.1.3 on the IB cluster, which ran fine. If I use the same version I run into the same problem on both systems (with --mca btl_openib_al

Re: [OMPI users] Latencies of atomic operations on high-performance networks

2018-11-08 Thread Nathan Hjelm via users
Ok, then it sounds like a regression. I will try to track it down today or tomorrow. -Nathan On Nov 08, 2018, at 01:41 PM, Joseph Schuchart wrote: Sorry for the delay, I wanted to make sure that I test the same version on both Aries and IB: git master bbe5da4. I realized that I had previous