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Set UCX_CUDA_COPY_MAX_REG_RATIO=1.0 when GPUs permit #824

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merged 3 commits into from
Jan 4, 2022
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Set UCX_CUDA_COPY_MAX_REG_RATIO=1.0 when GPUs permit #824

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9097664
Set UCX_CUDA_COPY_MAX_REG_RATIO=1.0 when GPU permits
pentschev Jan 3, 2022
a5ce736
Standardize `os.environ` checks
pentschev Jan 3, 2022
2dfb241
Setup logger before environment variables and log variables set
pentschev Jan 3, 2022
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34 changes: 29 additions & 5 deletions ucp/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,22 +23,46 @@
from .utils import get_ucxpy_logger # noqa
from ._libs.ucx_api import get_address # noqa

# Setup UCX-Py logger
logger = get_ucxpy_logger()


if "UCX_SOCKADDR_TLS_PRIORITY" not in os.environ and get_ucx_version() < (1, 11, 0):
logger.debug(
logger.info(
"Setting env UCX_SOCKADDR_TLS_PRIORITY=sockcm, "
"which is required to connect multiple nodes"
)
os.environ["UCX_SOCKADDR_TLS_PRIORITY"] = "sockcm"

if not os.environ.get("UCX_RNDV_THRESH", False):
if "UCX_RNDV_THRESH" not in os.environ:
logger.info("Setting UCX_RNDV_THRESH=8192")
os.environ["UCX_RNDV_THRESH"] = "8192"

if not os.environ.get("UCX_RNDV_SCHEME", False):
if "UCX_RNDV_SCHEME" not in os.environ:
logger.info("Setting UCX_RNDV_SCHEME=get_zcopy")
os.environ["UCX_RNDV_SCHEME"] = "get_zcopy"

if "UCX_CUDA_COPY_MAX_REG_RATIO" not in os.environ and get_ucx_version() >= (1, 12, 0):
try:
import pynvml

# After handling of environment variable logging, add formatting to the logger
logger = get_ucxpy_logger()
pynvml.nvmlInit()
device_count = pynvml.nvmlDeviceGetCount()
large_bar1 = [False] * device_count

for dev_idx in range(device_count):
handle = pynvml.nvmlDeviceGetHandleByIndex(dev_idx)
total_memory = pynvml.nvmlDeviceGetMemoryInfo(handle).total
bar1_total = pynvml.nvmlDeviceGetBAR1MemoryInfo(handle).bar1Total

if total_memory <= bar1_total:
large_bar1[dev_idx] = True

if all(large_bar1):
logger.info("Setting UCX_CUDA_COPY_MAX_REG_RATIO=1.0")
os.environ["UCX_CUDA_COPY_MAX_REG_RATIO"] = "1.0"
except ImportError:
pass


__version__ = _get_versions()["version"]
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