merge-metric-csvs.py: Fix order of symbols in output csv.

Change-Id: I1430b5a7d0c63d043a643a9243073f4d27b9ffa5

1 files changed, 8 insertions, 2 deletions

diff --git a/merge-metric-csvs.py b/merge-metric-csvs.py
index 032cdc4..27e7c04 100755
--- a/merge-metric-csvs.py
+++ b/merge-metric-csvs.py
@@ -37,8 +37,14 @@ def main():
     for metric in default_metric_values.keys():
         result[metric] = result[metric].fillna(default_metric_values[metric], downcast="infer")
 
-    # Sort according to benchmark, so that we get all the entries for same benchmark contiguously.
-    result = result.sort_values("benchmark")
+    # Sort in ascending order w.r.t benchmark, and then sort in
+    # descending order w.r.t sample.
+    # So, the output is:
+    # (1) All symbols belonging to same benchmark are ordered contiguously. 
+    # (2) All symbols within the same benchmark are ordered in descending order
+    #     w.r.t samples.
+
+    result = result.sort_values(["benchmark", "sample"], ascending=[True, False])
     result.to_csv(sys.stdout, index=False)
 
 if __name__ == "__main__":