Skip to content

UCX F2F Meeting August 2015

Jump to bottom Edit New page
Pavel Shamis / Pasha edited this page Aug 11, 2015 · 49 revisions

UCX face to face meeting, August 2015

When

Core discussions - August 11-13, 2015

Where

University of Knoxville TN, ICL Lab.
Philander P. Claxton Education Bldg., room 233
Knoxville, TN

Parking accommodations will be provided, the closest available visitor parking is G15 on White Avenue (see the following map, select "visitor" in the parking section: http://www.utk.edu/maps/ ).
Please use the parking visitor entrance on White Avenue and not the entrance on Clinch Ave (which is reserved for staff/students). Also please note that White Avenue is one way (you can use Clinch and then 16th South to get back to White). Park in this parking, we will have exit passes for you at the meeting.
Then go to Philander P Claxton.

Why: Agenda

Day 1 - Integration with advanced/emerging technologies.
09:00 AM

  • Presenting current UCX API (UCT,UCP) and discussing design decisions
  • Presenting PAMI
  • Discussion about preliminary integration experience - OpenSHMEM, ParSec
  • Registration cache structure
  • MPICH nemesis integration
  • XPMEM, KNEM, CMA
  • UCP generic active messages - do we need it? What is a good API?
  • I/O - what APIs are required
  • Support for NVRAM
  • Checkpoint/restart

Day 2 - Solving well-known problems in a better way
09:00 AM

  • Presenting Portals
  • Define thread safety model
  • Memory types, "routing" and GPU memory
  • Shared memory on different platforms
  • Review some alternatives for pending queue mechanics
  • Multi-transport/multi-rail
  • Bootstrap
  • Asynchronous progress and timers
  • Reducing progress overhead - avoid polling on unnecessary things

Day 3
09:00 AM

  • Rendezvous protocols
  • Collective APIs
  • Summary and work plan for upcoming year

Attendees:

  • Pavel Shamis (ORNL)
  • Oscar Hernandez (ORNL)
  • Aurelien Bouteiller (UTK)
  • Yossi Itigin (Mellanox)
  • Sameh Sharkawi (IBM)
  • Graham Lopez (ORNL)
  • Sreeram Potluri (NVIDIA)
  • George Bosilca (UTK)
  • Manjunath Gorentla (ORNL)
  • Amith Mamidala (IBM)
  • Sameer (IBM)
  • Matthew Baker (ORNL)
  • Stephen Richmond (UTK)
  • Richard Graham (Mellanox)
  • Alina Sklarevich (Mellanox)
  • Lena Oden (ANL)
  • Edgar Leon (LLNL)
  • Kento Sato (LLNL)
  • Nicholas Park (DoD)
  • Ron Brightwell (Sandia)
  • Hasan Abbasi (ORNL)
  • Placeholder (ORNL)

Notes

  • Statist aggregation interface for PEs
  • Ordering semantics
  • UCP/UCT Do we want to share the context for memory caches or not ? Shell it happen automatically or we may provide knob to user
  • Endpoint:
  • Requirement - very fast endpoint creation and destroy.
  • Endpoint scalability (memory footprint)
  • MPI-4 Endpoints ? What to do about this ?
  • Constant key (predefined set of keys stored in a predefined location)
  • bcopy - better name ?
  • pending queue ?
  • do we need blocking interface in UCP ?
  • datatypes ?

UCX - best communication library ever

Home
Bi-Weekly conference call
Guidance for contributors
Code style checking
UCF Collectives WG

Clone this wiki locally