Major enhancements to the IB signal forwarding mechanisms
(`host-no-atomic` mode), primarily adding support for GDRCopy and MLX5
Direct Verbs, and refactoring the signal forwarding path for IB
HostNoAtomic mode. The changes fix memory consistency issues and reduce
signaling latency.
- GDRCopy and MLX5 Direct Verbs MR integration
- Signal forwarding path redesign
- Semaphore and connection API updates
- Environment (`MSCCLPP_FORCE_DISABLE_GDR`) and documentation updates
- Removes the GTest dependency, replacing it with a minimal custom
framework (`test/framework.*`) that covers only what the tests actually
use — a unified `TEST()` macro with SFINAE-based fixture auto-detection,
`EXPECT_*`/`ASSERT_*` assertions, environments, and setup/teardown.
- `--exclude-perf-tests` flag and substring-based negative filtering
- `MSCCLPP_ENABLE_COVERAGE` CMake option with gcov/lcov; CI uploads to
Codecov
- Merges standalone `test/perf/` into main test targets
- Refactors Azure pipelines to reduce redundancies & make more readable
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Changho Hwang <changhohwang@microsoft.com>
* Add a compile flag `MSCCLPP_USE_IB` that explicitly specifies IB
on/off
* Fix `nvidia-peermem` check; no need for DMABUF supported systems
* Fix `mp_unit_tests` to skip all IB tests when built with
`-DMSCCLPP_USE_IB=OFF`
#### Version Format
The package version includes the git commit hash directly in the version
string for development builds:
- **Release version**: `0.7.0`
- **Development version**: `0.7.0.dev36+g6e2360d69` (includes short
commit hash)
- **Development with uncommitted changes**:
`0.7.0.dev36+g6e2360d69.dirty`
#### Checking Version Information
After installation, you can check the version information in several
ways:
**From Python:**
```python
import mscclpp
# Access individual attributes
print(f"Version: {mscclpp.__version__}") # Full version with commit
Version: 0.7.0.dev36+g6e2360d69
# Get as dictionary
mscclpp.version()
{'version': '0.7.0.dev46+gb0d27c58f', 'base_version': '0.7.0', 'git_commit': 'b0d27c58f'}
```
#### Version Information Details
The version tracking captures:
- **Package Version** (`mscclpp.__version__`): Full version string
including git commit (e.g., `0.7.0.dev36+g6e2360d69`)
This information is embedded during the package build process and
remains accessible even after distribution, making it easier to debug
issues and ensure reproducibility.
---------
Co-authored-by: Binyang Li <binyli@microsoft.com>
Integrate MSCCL++ with torch
Introduce `NCCL audit shim library`, use can use following commands to
launch torch library. Also avoid break build pipeline in the CPU machine
```bash
export LD_AUDIT=$MSCCLPP_INSTALL_DIR/libmscclpp_audit_nccl.so
export LD_LIBRARY_PATH=$MSCCLPP_INSTALL_DIR:$LD_LIBRARY_PATH
torchrun --nnodes=1 --nproc_per_node=8 your_script.py
```
For push function, we only need to make sure the instruction `st.global`
will be executed after the while loop. Since there is a Write-After-Read
hazard for `trigger.fst` (Check `this->triggers[curFifoHead % size].fst
!= 0` first then write value to `triggers[curFifoHead % size]`), we can
expect the compiler and hardware can handle this situation correctly.
Remove the `release.sys` there.
BTW, `st.global.release.sys.v2.u64` will cause perf regression issue.
Previous we use `st.global.release.cta.v2.u64`, but seems not necessary.
