Add callgrind support for the performance testsuite

testsuite/drivers/base_driver.py

@@ -318,6 +318,17 @@ def data_file(suffix: str) -> str:
                 self.result.info["time"] = " ".join(time_list)
                 self.result.info["memory"] = " ".join(memory_list)
 
+            elif mode == "callgrind":
+                result = run("valgrind", "--tool=callgrind")
+                # Callgrind outputs the number of executed instructions in its
+                # trace. Search for the line containing "Collected".
+                ir = "0"
+                for line in result.splitlines():
+                    if "Collected" in line:
+                        ir = line.split()[-1]
+                        break
+                self.result.info["callgrind"] = ir
+
             elif self.env.perf_no_profile:
                 # If we are asked for this testsuite run not to compute
                 # profiles, skip to the next mode.

testsuite/testsuite.py

@@ -337,6 +337,8 @@ def compute_stats(numbers_str: str,
                   + compute_stats(entry.info["time"], float, format_time))
             print("  memory: "
                   + compute_stats(entry.info["memory"], int, format_memory))
+            if "callgrind" in entry.info:
+                print("  callgrind's Ir: " + entry.info["callgrind"])
 
 
 if __name__ == '__main__':