Compute Library
 21.02
Utils.cpp
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1 /*
2  * Copyright (c) 2017-2020 Arm Limited.
3  *
4  * SPDX-License-Identifier: MIT
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24 #include "src/runtime/Utils.h"
25 
27 
28 #include <cmath>
29 #include <map>
30 #include <string>
31 
32 namespace arm_compute
33 {
34 namespace utils
35 {
36 #ifndef DOXYGEN_SKIP_THIS
37 static const std::string information =
38 #include "arm_compute_version.embed"
39  ;
40 #endif /* DOXYGEN_SKIP_THIS */
41 
43 {
44  static std::map<Scheduler::Type, const std::string> scheduler_type_map =
45  {
46  { Scheduler::Type::ST, "Single Thread" },
47  { Scheduler::Type::CPP, "C++11 Threads" },
48  { Scheduler::Type::OMP, "OpenMP Threads" },
49  { Scheduler::Type::CUSTOM, "Custom" }
50  };
51 
52  return scheduler_type_map[t];
53 }
54 
56 {
57  if(ctx)
58  {
59  ARM_COMPUTE_ERROR_ON(ctx->scheduler() == nullptr);
60  ctx->scheduler()->schedule(kernel, hints);
61  }
62  else
63  {
64  NEScheduler::get().schedule(kernel, hints);
65  }
66 }
67 
68 unsigned int calculate_number_of_stages_only_x_axis(size_t input_x_dimension, unsigned int axis)
69 {
70  // We need only 1 stage for all axis except x-axis
71  if(axis != 0)
72  {
73  return 1;
74  }
75  // Calculate number of WGs. 16 elements per thread, 8 threads per WG
76  const auto num_of_wg = static_cast<unsigned int>(ceil(input_x_dimension / 128.f));
77 
78  // Calculate number of stages. First stage performs op and the rest reduction sum
79  // depending on the size of the input. Last stage should have only 1 WG.
80  const unsigned int num_of_stages = num_of_wg / 128 + 2;
81  return num_of_stages;
82 }
83 } // namespace utils
84 } // namespace arm_compute
unsigned int calculate_number_of_stages_only_x_axis(size_t input_x_dimension, unsigned int axis)
Calculate number of stages for parallel implementations.
Definition: Utils.cpp:68
Type
Scheduler type.
Definition: Scheduler.h:39
Common interface for all kernels implemented in C++.
Definition: ICPPKernel.h:38
#define ARM_COMPUTE_ERROR_ON(cond)
If the condition is true then an error message is printed and an exception thrown.
Definition: Error.h:466
Copyright (c) 2017-2021 Arm Limited.
void schedule_kernel_on_ctx(IRuntimeContext *ctx, ICPPKernel *kernel, const IScheduler::Hints &hints)
Schedules a kernel using the context if not nullptr else uses the legacy scheduling flow...
Definition: Utils.cpp:55
virtual IScheduler * scheduler()=0
Scheduler accessor.
virtual void schedule(ICPPKernel *kernel, const Hints &hints)=0
Runs the kernel in the same thread as the caller synchronously.
const std::string & string_from_scheduler_type(Scheduler::Type t)
Convert a Scheduler::Type into a string.
Definition: Utils.cpp:42
static IScheduler & get()
Access the scheduler singleton.
Definition: Scheduler.cpp:94