[Mono-bugs] [Bug 550420] New: IA64 performance 15x slower than expected.

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Oct 27 10:49:52 EDT 2009


           Summary: IA64 performance 15x slower than expected.
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.4.x
          Platform: IA64
        OS/Version: SLES 10
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: charles at asc.edu
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

Created an attachment (id=324343)
 --> (http://bugzilla.novell.com/attachment.cgi?id=324343)
c# program and output 

Description of Problem:

For most things I'm seeing a 2-5x performance on an IA64 system over my Celeron
(which is about the cheapest thing money can buy)

However my Celeron stomps the IA64 system for a test mono program by 10-15x.  
Can you please explain this or improve IA64 mono performance?

Steps to reproduce the problem:
1.  Run the attached C# program on an x86 or x86_64 system
2.  Run the attached C# program on an IA64 system

Actual Results:
Here are the run times I'm getting.   

17-21 secs for int_sin.exe Intel(R) Celeron(R) CPU          215  @ 1.33GHz
332   secs for int_sin.exe Itanium2 1.4 GHz  (mono - compiled from
280   secs for int_sin.exe Itanium2 1.4 GHz  (mono 1.2.2 - from SLES 10 SP3)

Expected Results:
Both Itanium2 runs should have been less that 17 secs.

How often does this happen? 
Every time.

Additional Information:
See attached files.

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