[Mono-bugs] [Bug 79356][Wis] New - Very bad performance of Mono on Itanium

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Changed by yury at serdyuk.botik.ru.

http://bugzilla.ximian.com/show_bug.cgi?id=79356

--- shadow/79356	2006-09-11 09:51:33.000000000 -0400
+++ shadow/79356.tmp.25145	2006-09-11 09:51:33.000000000 -0400
@@ -0,0 +1,75 @@
+Bug#: 79356
+Product: Mono: Runtime
+Version: 1.0
+OS: SLES 9
+OS Details: SUSE LINUX Enterprise Server 9 (ia64)
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: JIT
+AssignedTo: lupus at ximian.com                            
+ReportedBy: Yury at serdyuk.botik.ru               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Very bad performance of Mono on Itanium
+
+Description of Problem: Very bad performance of Mono on Itanium
+for simple loop with assign statement.
+
+Steps to reproduce the problem:
+1. Compile and run the program
+using System;
+
+public class TestDoubleLoop {
+
+ public static void Main ( String[] args )   {
+ 
+  int      i, j;
+  
+  byte[,]  W = null;
+  
+  int      s1 = 25900;
+  int      s2 = 3238;
+  
+  DateTime  dt1,dt2;
+  TimeSpan  dt;
+  
+  dt1 = DateTime.Now;
+  
+  W = new byte [ s1, s2 ];
+  
+  for ( i = 0; i < s1; i++ )
+   for ( j = 0; j < s2; j++ )
+    W [ i, j ] = 0;
+    
+  dt2 = DateTime.Now;
+  dt  = dt2.Subtract ( dt1 );
+  Console.WriteLine ( "Elapsed time  is " + dt.TotalSeconds );
+    
+ }
+ 
+}
+ 
+Actual Results:
+serdyuk at al:~/Palm> mono TestDoubleLoop.exe
+Elapsed time  is 1.908975
+serdyuk at al:~/Palm> mono TestDoubleLoop.exe
+Elapsed time  is 1.911724
+
+
+Expected Results ( running on AMD Athlon 2000+):
+[serdyuk at skif Palm]$ mono TestDoubleLoop.exe
+Elapsed time  is 0.032013
+[serdyuk at skif Palm]$ mono TestDoubleLoop.exe
+Elapsed time  is 0.032087
+
+
+
+How often does this happen? 
+Always
+
+Additional Information:
+Version Mono : 1.1.17.1