Fix LWS search space used by CLTuner

* Ensure CLTuner uses the real GWS used by run(), instead of the
  static GWS (which is usually changed at run time), by caching GWS in
  each kernel

  Note this is a somewhat inelegant workaround. The real issue stems
  from the fact that execution window and scheduler are very much
  coupled with our operator run() / run_op() method.
  (Please see COMPMID-5934)

* Restrict LWS values to explore within GWS bound for exhaustive mode

* Refactor gws_from_window() to include all the information required
  to calculate GWS

* Log lws search space used for tuning

* Fix ClDirectConv2dKernel config id

Resolves COMPMID-5892

Signed-off-by: SiCong Li <sicong.li@arm.com>
Change-Id: I420490d8b94d13ada2e44eb0a12078f883379334
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9193
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

2 files changed, 30 insertions, 15 deletions

diff --git a/src/runtime/CL/CLTuner.cpp b/src/runtime/CL/CLTuner.cpp
index 1cc20f0c1e..445638f01f 100644
--- a/src/runtime/CL/CLTuner.cpp
+++ b/src/runtime/CL/CLTuner.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2022 Arm Limited.
+ * Copyright (c) 2017-2023 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -26,6 +26,7 @@
 
 #include "arm_compute/core/Error.h"
 #include "arm_compute/runtime/CL/CLScheduler.h"
+#include "src/common/utils/Log.h"
 #include "src/core/CL/ICLKernel.h"
 #include "support/StringSupport.h"
 
@@ -199,11 +200,19 @@ CLTuningParams CLTuner::find_optimal_tuning_params(ICLKernel &kernel, IKernelDat
     };
     CLSymbols::get().clEnqueueNDRangeKernel_ptr = interceptor;
 
-    cl::NDRange gws = ICLKernel::gws_from_window(kernel.window());
-
     // Run the kernel with default lws to be used as baseline
     data->do_run(kernel, queue_profiler);
 
+    /// Get the cached gws used by the kernel
+    /// NOTE: The window configured inside configure() is usually changed in run(). Thus we should not calculate gws
+    /// from this static window. Instead we get the real gws used (and cached) by run() in the previous step.
+    /// This is only a temporary workaround. An ideal solution involves decoupling the execution window from run() / run_op()
+    /// Please see COMPMID-5934
+    cl::NDRange gws = kernel.get_cached_gws();
+    ARM_COMPUTE_LOG_MSG_WITH_FORMAT_ACL(arm_compute::logging::LogLevel::INFO,
+                                        "[CLTuner] Kernel with config_id '%s' uses %s as the upper-bound for lws search",
+                                        kernel.config_id().c_str(), to_string(gws).c_str());
+
     queue_profiler.finish();
 
     const cl_ulong start         = _kernel_event.getProfilingInfo<CL_PROFILING_COMMAND_START>();
@@ -236,6 +245,9 @@ CLTuningParams CLTuner::find_optimal_tuning_params(ICLKernel &kernel, IKernelDat
             cl_int wbsm_test = tuning_test.get_wbsm();
             kernel.set_wbsm_hint(wbsm_test);
         }
+        ARM_COMPUTE_LOG_MSG_WITH_FORMAT_ACL(arm_compute::logging::LogLevel::INFO,
+                                            "[CLTuner] Trying LWS: %s, WBSM: %d",
+                                            to_string(kernel.lws_hint()).c_str(), kernel.wbsm_hint());
 
         // Run the kernel
         data->do_run(kernel, queue_profiler);
diff --git a/src/runtime/CL/tuners/CLTuningParametersList.cpp b/src/runtime/CL/tuners/CLTuningParametersList.cpp
index 6cb2212794..6f3e32491a 100644
--- a/src/runtime/CL/tuners/CLTuningParametersList.cpp
+++ b/src/runtime/CL/tuners/CLTuningParametersList.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2021 Arm Limited.
+ * Copyright (c) 2019-2021, 2023 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,7 +31,7 @@ constexpr unsigned int max_lws_supported_x{ 64u };
 constexpr unsigned int max_lws_supported_y{ 32u };
 constexpr unsigned int max_lws_supported_z{ 32u };
 
-/** Non instantiable base class for Tuning parameters combinations that use Index2Cooard mapping */
+/** Non instantiable base class for Tuning parameters combinations that use Index2Coord mapping */
 class CLTuningParametersList : public ICLTuningParametersList
 {
 protected:
@@ -162,10 +162,13 @@ CLTuningParams CLTuningParametersListExhaustive::operator[](size_t index)
 
 CLTuningParametersListExhaustive::CLTuningParametersListExhaustive(const cl::NDRange &gws, CLTuningInfo tuning_info)
 {
-    ARM_COMPUTE_UNUSED(gws);
-    search_space_shape[0] = max_lws_supported_x;
-    search_space_shape[1] = max_lws_supported_y;
-    search_space_shape[2] = max_lws_supported_z;
+    const auto lws_x_max = std::min(static_cast<unsigned int>(gws[0]), max_lws_supported_x);
+    const auto lws_y_max = std::min(static_cast<unsigned int>(gws[1]), max_lws_supported_y);
+    const auto lws_z_max = std::min(static_cast<unsigned int>(gws[2]), max_lws_supported_z);
+
+    search_space_shape[0] = lws_x_max;
+    search_space_shape[1] = lws_y_max;
+    search_space_shape[2] = lws_z_max;
     search_space_shape[3] = 1;
     if(tuning_info.tune_wbsm)
     {
@@ -183,9 +186,9 @@ CLTuningParams CLTuningParametersListNormal::operator[](size_t index)
 
 CLTuningParametersListNormal::CLTuningParametersListNormal(const cl::NDRange &gws, CLTuningInfo tuning_info)
 {
-    auto lws_x_max = std::min(static_cast<unsigned int>(gws[0]), max_lws_supported_x);
-    auto lws_y_max = std::min(static_cast<unsigned int>(gws[1]), max_lws_supported_y);
-    auto lws_z_max = std::min(static_cast<unsigned int>(gws[2]), max_lws_supported_z);
+    const auto lws_x_max = std::min(static_cast<unsigned int>(gws[0]), max_lws_supported_x);
+    const auto lws_y_max = std::min(static_cast<unsigned int>(gws[1]), max_lws_supported_y);
+    const auto lws_z_max = std::min(static_cast<unsigned int>(gws[2]), max_lws_supported_z);
 
     // Initialize the tuning parameters values to test
     _lws_x = {};
@@ -227,9 +230,9 @@ void CLTuningParametersListNormal::initialize_lws_values(std::vector<unsigned in
 
 CLTuningParametersListRapid::CLTuningParametersListRapid(const cl::NDRange &gws, CLTuningInfo tuning_info)
 {
-    auto lws_x_max = std::min(static_cast<unsigned int>(gws[0]), 8u); // Limit exploration to 1 - 8
-    auto lws_y_max = std::min(static_cast<unsigned int>(gws[1]), 4u); // Limit exploration to 1 - 4
-    auto lws_z_max = std::min(static_cast<unsigned int>(gws[2]), 4u); // Limit exploration to 1 - 4
+    const auto lws_x_max = std::min(static_cast<unsigned int>(gws[0]), 8u); // Limit exploration to 1 - 8
+    const auto lws_y_max = std::min(static_cast<unsigned int>(gws[1]), 4u); // Limit exploration to 1 - 4
+    const auto lws_z_max = std::min(static_cast<unsigned int>(gws[2]), 4u); // Limit exploration to 1 - 4
 
     // Initialize the LWS values to test
     _lws_x = {};