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<section id="torchtrtc">
<span id="id1"></span><h1>torchtrtc<a class="headerlink" href="#torchtrtc" title="Permalink to this headline">¶</a></h1>
<p><code class="docutils literal notranslate"><span class="pre">torchtrtc</span></code> is a CLI application for using the Torch-TensorRT compiler. It serves as an easy way to compile a
TorchScript Module with Torch-TensorRT from the command-line to quickly check support or as part of
a deployment pipeline. All basic features of the compiler are supported including post training
quantization (though you must already have a calibration cache file to use the PTQ feature). The compiler can
output two formats, either a TorchScript program with the TensorRT engine embedded or
the TensorRT engine itself as a PLAN file.</p>
<p>All that is required to run the program after compilation is for C++ linking against <code class="docutils literal notranslate"><span class="pre">libtorchtrt.so</span></code>
or in Python importing the torch_tensorrt package. All other aspects of using compiled modules are identical
to standard TorchScript. Load with <code class="docutils literal notranslate"><span class="pre">torch.jit.load()</span></code> and run like you would run any other module.</p>
<div class="highlight-txt notranslate"><div class="highlight"><pre><span></span>torchtrtc [input_file_path] [output_file_path]
[input_specs...] {OPTIONS}
torchtrtc is a compiler for TorchScript, it will compile and optimize
TorchScript programs to run on NVIDIA GPUs using TensorRT
OPTIONS:
-h, --help Display this help menu
Verbiosity of the compiler
-v, --verbose Dumps debugging information about the
compilation process onto the console
-w, --warnings Disables warnings generated during
compilation onto the console (warnings
are on by default)
--i, --info Dumps info messages generated during
compilation onto the console
--build-debuggable-engine Creates a debuggable engine
--allow-gpu-fallback (Only used when targeting DLA
(device-type)) Lets engine run layers on
GPU if they are not supported on DLA
--require-full-compilation Require that the model should be fully
compiled to TensorRT or throw an error
--check-method-support=[method_name]
Check the support for end to end
compilation of a specified method in the
TorchScript module
--disable-tf32 Prevent Float32 layers from using the
TF32 data format
--sparse-weights Enable sparsity for weights of conv and
FC layers
-p[precision...],
--enable-precision=[precision...] (Repeatable) Enabling an operating
precision for kernels to use when
building the engine (Int8 requires a
calibration-cache argument) [ float |
float32 | f32 | fp32 | half | float16 |
f16 | fp16 | int8 | i8 | char ]
(default: float)
-d[type], --device-type=[type] The type of device the engine should be
built for [ gpu | dla ] (default: gpu)
--gpu-id=[gpu_id] GPU id if running on multi-GPU platform
(defaults to 0)
--dla-core=[dla_core] DLACore id if running on available DLA
(defaults to 0)
--engine-capability=[capability] The type of device the engine should be
built for [ standard | safety |
dla_standalone ]
--calibration-cache-file=[file_path]
Path to calibration cache file to use
for post training quantization
--teo=[op_name...],
--torch-executed-op=[op_name...] (Repeatable) Operator in the graph that
should always be run in PyTorch for
execution (partial compilation must be
enabled)
--tem=[module_name...],
--torch-executed-mod=[module_name...]
(Repeatable) Module that should always
be run in Pytorch for execution (partial
compilation must be enabled)
--mbs=[num_ops],
--min-block-size=[num_ops] Minimum number of contiguous TensorRT
supported ops to compile a subgraph to
TensorRT
--embed-engine Whether to treat input file as a
serialized TensorRT engine and embed it
into a TorchScript module (device spec
must be provided)
--num-avg-timing-iters=[num_iters]
Number of averaging timing iterations
used to select kernels
--workspace-size=[workspace_size] Maximum size of workspace given to
TensorRT
--dla-sram-size=[dla_sram_size] Fast software managed RAM used by DLA
to communicate within a layer.
--dla-local-dram-size=[dla_local_dram_size] Host RAM used by DLA to share
intermediate tensor data across operations.
--dla-global-dram-size=[dla_global_dram_size] Host RAM used by DLA to store
weights and metadata for execution
--atol=[atol] Absolute tolerance threshold for acceptable
numerical deviation from standard torchscript
output (default 1e-8)
--rtol=[rtol] Relative tolerance threshold for acceptable
numerical deviation from standard torchscript
output (default 1e-5)
--no-threshold-check Skip checking threshold compliance
--truncate-long-double,
--truncate, --truncate-64bit Truncate weights that are provided in
64bit to 32bit (Long, Double to Int,
Float)
--save-engine Instead of compiling a full a
TorchScript program, save the created
engine to the path specified as the
output path
--custom-torch-ops (repeatable) Shared object/DLL containing custom torch operators
--custom-converters (repeatable) Shared object/DLL containing custom converters
input_file_path Path to input TorchScript file
output_file_path Path for compiled TorchScript (or
TensorRT engine) file
input_specs... Specs for inputs to engine, can either
be a single size or a range defined by
Min, Optimal, Max sizes, e.g.
"(N,..,C,H,W)"
"[(MIN_N,..,MIN_C,MIN_H,MIN_W);(OPT_N,..,OPT_C,OPT_H,OPT_W);(MAX_N,..,MAX_C,MAX_H,MAX_W)]".
Data Type and format can be specified by
adding an "@" followed by dtype and "%"
followed by format to the end of the
shape spec. e.g. "(3, 3, 32,
32)@f16%NHWC"
"--" can be used to terminate flag options and force all following
arguments to be treated as positional options
</pre></div>
</div>
<p>e.g.</p>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>torchtrtc<span class="w"> </span>tests/modules/ssd_traced.jit.pt<span class="w"> </span>ssd_trt.ts<span class="w"> </span><span class="s2">"[(1,3,300,300); (1,3,512,512); (1, 3, 1024, 1024)]@f16%contiguous"</span><span class="w"> </span>-p<span class="w"> </span>f16
</pre></div>
</div>
<ul class="simple">
<li><p>To include a set of custom operators</p></li>
</ul>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>torchtrtc<span class="w"> </span>tests/modules/ssd_traced.jit.pt<span class="w"> </span>ssd_trt.ts<span class="w"> </span>--custom-torch-ops<span class="o">=</span><path<span class="w"> </span>to<span class="w"> </span>custom<span class="w"> </span>library<span class="w"> </span>.so<span class="w"> </span>file><span class="w"> </span><span class="s2">"[(1,3,300,300); (1,3,512,512); (1, 3, 1024, 1024)]@fp16%contiguous"</span><span class="w"> </span>-p<span class="w"> </span>f16
</pre></div>
</div>
<ul class="simple">
<li><p>To include a set of custom converters</p></li>
</ul>
<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>torchtrtc<span class="w"> </span>tests/modules/ssd_traced.jit.pt<span class="w"> </span>ssd_trt.ts<span class="w"> </span>--custom-converters<span class="o">=</span><path<span class="w"> </span>to<span class="w"> </span>custom<span class="w"> </span>library<span class="w"> </span>.so<span class="w"> </span>file><span class="w"> </span><span class="s2">"[(1,3,300,300); (1,3,512,512); (1, 3, 1024, 1024)]@fp16%contiguous"</span><span class="w"> </span>-p<span class="w"> </span>f16
</pre></div>
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