Add Support for Profiling TFLM Models in Benchmarks
If the "profile" flag is set to True (default False), the benchmark
will profile the cycles per op (for just one iteration) instead of
the standard benchmark. Outputs cycles in CSV format.
Tested:
soundstream benchmark with profile=True/False
Change-Id: I6fc7e23161d090aca03fb60741dcfe99aa3edc6b
diff --git a/benchmarks/cycle_count.h b/benchmarks/cycle_count.h
new file mode 100644
index 0000000..949e2bd
--- /dev/null
+++ b/benchmarks/cycle_count.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BENCHMARKS_CYCLE_COUNT_H_
+#define BENCHMARKS_CYCLE_COUNT_H_
+
+inline uint64_t mcycle_read(void) {
+ uint32_t cycle_low = 0;
+ uint32_t cycle_high = 0;
+ uint32_t cycle_high_2 = 0;
+ asm volatile(
+ "1:"
+ " csrr %0, mcycleh;" // Read `mcycleh`.
+ " csrr %1, mcycle;" // Read `mcycle`.
+ " csrr %2, mcycleh;" // Read `mcycleh` again.
+ " bne %0, %2, 1b;"
+ : "=r"(cycle_high), "=r"(cycle_low), "=r"(cycle_high_2)
+ :);
+ return static_cast<uint64_t>(cycle_high) << 32 | cycle_low;
+}
+
+#endif // #ifndef BENCHMARKS_CYCLE_COUNT_H_
\ No newline at end of file
