COMPMID-1021: CPUInfo refactoring.

Removed CPUTarget in favor of the CPUModel type.
CPUInfo now holds a vector of N CPUs.
CPUInfo autoinitialise upon construction with 1 GENERIC CPU.
CPPScheduler fills CPUInfo's vector upon construction (runtime).
IScheduler has a single CPUInfo obj and ThreadInfo always gets a pointer to it (avoid copying the vector)

Change-Id: I30f293258c959c87f6bac5eac8b963beb6a4d365
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/124626
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/arm_compute/runtime/CPUUtils.h b/arm_compute/runtime/CPUUtils.h
new file mode 100644
index 0000000000..70211a5817
--- /dev/null
+++ b/arm_compute/runtime/CPUUtils.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_RUNTIME_CPU_UTILS_H__
+#define __ARM_COMPUTE_RUNTIME_CPU_UTILS_H__
+
+namespace arm_compute
+{
+class CPUInfo;
+/** This function will try to detect the CPU configuration on the system and will fill
+ *  the cpuinfo object accordingly to reflect this.
+ *
+ * @param[out] cpuinfo @ref CPUInfo to be used to hold the system's cpu configuration.
+ */
+void get_cpu_configuration(CPUInfo &cpuinfo);
+/** Some systems have both big and small cores, this fuction computes the minimum number of cores
+ *  that are exactly the same on the system. To maximize performance the library attempts to process
+ *  workloads concurrently using as many threads as big cores are available on the system.
+ *
+ * @return The minumum number of common cores.
+ */
+unsigned int get_threads_hint();
+}
+#endif /* __ARM_COMPUTE_RUNTIME_CPU_UTILS_H__ */