[calc_stats] fix max name and remember last syscall

calc_stats.py

@@ -31,6 +31,9 @@ def read_csv(stream) -> Data:
         all_nanos.append(nanos)
         all_cycles.append(cycles)
 
+    # store the last syscall
+    data[syscall] = {'nanos': all_nanos, 'cycles': all_cycles}
+
     return data
 
 SyscallStats = T.Mapping[str, float]
@@ -51,7 +54,7 @@ def calc_stats(data: Data) -> Stats:
 
             values.sort()
             measure_stats['min'] = values[0]
-            measure_stats['may'] = values[-1]
+            measure_stats['max'] = values[-1]
             measure_stats['median'] = numpy.median(values)
             upper_quartile = numpy.percentile(values, 75)
             measure_stats['upper_quartile'] = upper_quartile