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[SYCL][Doc] Add ONEAPI_PVC_SEND_WAR_WA env variable description #19791

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[SYCL][Doc] Add ONEAPI_PVC_SEND_WAR_WA env variable description #19791

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1 change: 1 addition & 0 deletions sycl/doc/EnvironmentVariables.md
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Expand Up @@ -8,6 +8,7 @@ compiler and runtime.
| Environment variable | Values | Description |
| -------------------- | ------ | ----------- |
| `ONEAPI_DEVICE_SELECTOR` | [See below.](#oneapi_device_selector) | This device selection environment variable can be used to limit the choice of devices available when the SYCL-using application is run. Useful for limiting devices to a certain type (like GPUs or accelerators) or backends (like Level Zero or OpenCL). This device selection mechanism is replacing `SYCL_DEVICE_FILTER` . The `ONEAPI_DEVICE_SELECTOR` syntax is shared with OpenMP and also allows sub-devices to be chosen. [See below.](#oneapi_device_selector) for a full description. |
| `ONEAPI_PVC_SEND_WAR_WA` | '1' or '0' | Controls the workaround for Erratum "FP64 register ordering violation" on Intel Ponte Vecchio GPUs. Setting `ONEAPI_PVC_SEND_WAR_WA=0` disables the workaround and is only safe if the secondary FP64 pipeline is disabled. Default is enabled ('1') and applied throughout the oneAPI software stack - including OneDNN, OneMKL, OpenCL and Level Zero Runtimes, and Intel Graphics Compiler. |
| `SYCL_DEVICE_ALLOWLIST` | See [below](#sycl_device_allowlist) | Filter out devices that do not match the pattern specified. `BackendName` accepts `host`, `opencl`, `level_zero`, `native_cpu` or `cuda`. `DeviceType` accepts `host`, `cpu`, `gpu`, `fpga`, or `acc`. `fpga` and `acc` are handled in the same manner. `DeviceVendorId` accepts uint32_t in hex form (`0xXYZW`). `DriverVersion`, `PlatformVersion`, `DeviceName` and `PlatformName` accept regular expression. Special characters, such as parenthesis, must be escaped. DPC++ runtime will select only those devices which satisfy provided values above and regex. More than one device can be specified using the piping symbol "\|".|
| `SYCL_DISABLE_PARALLEL_FOR_RANGE_ROUNDING` | Any(\*) | Disables automatic rounding-up of `parallel_for` invocation ranges. |
| `SYCL_CACHE_DIR` | Path | Path to persistent cache root directory. Default values are `%AppData%\libsycl_cache` for Windows and `$XDG_CACHE_HOME/libsycl_cache` on Linux, if `XDG_CACHE_HOME` is not set then `$HOME/.cache/libsycl_cache`. When none of the environment variables are set SYCL persistent cache is disabled. |
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