CBPS-985: Increase default precision of calculated backup size

Change-Id: If780fb91445fb47f0014c6cf935d80d4c1d5f190
Reviewed-on: https://review.couchbase.org/c/perfrunner/+/169441
Tested-by: Build Bot <[email protected]>
Reviewed-by: Korrigan Clark <[email protected]>

Author: d-nagy

perfrunner/helpers/local.py

@@ -213,7 +213,7 @@ def calc_backup_size(cluster_spec: ClusterSpec,
     backup_size = backup_size.split()[0]
     backup_size = float(backup_size) / 2 ** 30  # B -> GB
 
-    return round(backup_size) if rounded else backup_size
+    return round(backup_size, 2) if rounded else backup_size
 
 
 def restore(master_node: str, cluster_spec: ClusterSpec, threads: int,

perfrunner/remote/linux.py

@@ -708,7 +708,7 @@ def calc_backup_size(self, cluster_spec: ClusterSpec,
         backup_size = backup_size.split()[0]
         backup_size = float(backup_size) / 2 ** 30  # B -> GB
 
-        return round(backup_size) if rounded else backup_size
+        return round(backup_size, 2) if rounded else backup_size
 
     @master_client
     def backup(self, master_node: str, cluster_spec: ClusterSpec, threads: int,