v1.16.0 RC2

1.16.0 RC2 (January 21, 2024)

Features:

UCP

• Added tag offload rendezvous protocol in new infrastructure
• Added rcache to old protocols infrastructure
• Added multi-fragment protocols for stream API in new infrastructure
• Enabled new protocols infrastructure by default
• Removed context param from ucp_memh_put
• Added assertion if trying to register unsupported memory type
• Adjusted rendezvous latency to improve scalability
• Improved endpoint configuration logging information
• Added check for max length of user defined Active Message header
• Added rcache support for mem type memory registration
• Enabled error handling for rndv/put_zcopy protocol
• Enabled v2 as default client/server connection establishment packet version
• Enabled rendezvous protocol selection for reachable MDs only
• Added ucp_rkey_compare API to enable rkey comparison
• Added release version to worker address to enable wire compatability
• Added support for memory invalidation for rendezvous through DC transport
• Enabled the use of strong fence with new protocols infrastructure

UCT

• Added UCS_MEMORY_TYPE_RDMA memory type for better latency on supported devices
• Implemented is_reachable_v2 API for IB transport
• Added ep_is_conntected API

RDMA CORE (IB, ROCE, etc.)

• Added Floating LID(FLID) based routing support
• Added latency and min_zcopy configuration variables to ROCm-IPC
• Added support for indirect MR for cross-gvmi mkey instead of direct MR with DEVX UMEM

TCP

• Added filter for eliminate bridge devices from lane selection

GPU (CUDA, ROCM)

• Added support for handling memh with multiple registrations
• Added performance estimation BW based on GPU type
• Adjusted rocm/ipc latency and zcopy threshold parameters
• Improved error message when libnvidia-ml not installed
• Added profiling to Cuda runtime API calls
• Adjusted gdr_copy estimated BW to improve protocol selection

Shared Memory

• Adjusted FIFO_SIZE to improve scalability
• Removed redundent rcahce implementation in knem transport
• Added support for symmetric rkey to improve memory usage

UCS

• Improved scalability of connection establishment flow
• Improved memtype cache performance by replacing ptrhead_lock to spinlock
• Added support for VLAN over channel bonding interface
• Added LRU cache and Usage Tracker datastructures
• Improved cross-NUMA device detection

Build

• Added LCOV coverage report as a build option
• Added binutils 2.40 library dependencies
• Added development modulefile

Tools

• Added information about sizes of ucp_request_t fields in ucx_info
• Added ucx env to profiling output
• Added MAD RTE in ucx_perftest to support setups without IPoIB

Tests

• Added GTEST_LOG_LEVEL env var to set log level just before test run
• Disabled protov1 and ud_verbs tests for valgrind mode
• Reduced gtest execution time

Documentation

• Added a few details to coding style

Bugfixes:

UCP

• Reverted wireup latency calculation which caused lanes selection issue
• Fixed strong fence to always ensure ordering
• Fixed registration of memh for RNDV protocol
• Fixed rndv_put and rkey_ptr assertion failure
• Fixed performance estimation for multi-fragment protocols
• Fixed memory registration error handling
• Fixed buffer overflow of large log messages
• Fixed progress enabling for selected lanes
• Fixed atomic lanes progress enabling
• Added missing rendezvous schemes to environment variable documentation
• Fixed bcopy BW estimation for AMD
• Fixed lanes information printing for new protocols infrastructure
• Fixed rndv_am protocol thresholds
• Fixed fp8 packing issue
• Fixed Intel OneAPI compilation error
• Fixed CM address packing on server side
• Fixed endpoint reconfiguration issue due to asymmetrical selection
• Fixed asymmetrical selection due to wire compatability issue
• Fixed potential deadlock with cuda_copy and RTR protocol
• Fixed tag_recv return value on immediate completion
• Fixed memory corruption by proper memh handling in tag offload rendezvous
• Changed default allocator to not use reserved huge pages
• Fixed rndv put protocol to avoid early completion

RDMA CORE (IB, ROCE, etc.)

• Fixed compilation failure when DevX is explicitly disabled
• Fixed crash when using PCIe relaxed ordering
• Fixed remote access error with rc_verbs transport
• Fixed endpoint address management in unified mode
• Fixed assertion failure when configured with UCX_IB_ADDR_TYPE=ib_global
• Fixed overwritten MD attribute capabilities when querying a device
• Fixed ibv_reg_mr error by registering memory in rcache callback

TCP

• Fixed assymetric lanes selection issue due to inconsistent device listing

GPU (CUDA, ROCM)

• Fixed compilation flags to support ROCm 6.0
• Fixed values of D2H_THRESH and latencey params
• Fixed Cuda memory support for iov datatype
• Increased max number of agents in ROCm

Shared Memoey

• Fixed posix and cma transport selection by enhancing reachability checks
• Fixed UGNI build failure
• Fixed latency overhead for knem and cma transports
• Fixed possible out-of-order issue in mm_iface

UCS

• Fixed a deadlock when forked debugger is attached during an error in rcache operation
• Fixed crash due to passing null pointer to log function
• Fixed crash due to incorrect hashing method
• Fixed crash in configuration parser cleanup by moving it after profiler cleanup
• Fixed floating point division by zero during protocols initialization

UCM

• Fixed occasional crash in bisto hooks by adding a lock before hooking

Java

• Fixed go tests by setting CUDA device before allocating CUDA memory
• Fixed perftest error detection and hanging issue

Tools

• Fixed cpu model type for AMD Genoa in ucx_info
• Enhanced multi-thread test output

Build

• Fixed JUCX package publishing, so it will include support for ARM
• Fixed ROCm building and testing
• Removed libnvidia-compute version dependency
• Removed libibmad/libumad from default build configuration to avoid runtime dependency