[Mono-dev] substantial performance regression between 2.10 and 2.6 or impl diff?

[Jonathan Shore]

Ok.  When you have a chance can you indicate your marks & CPU?   I expect a reasonably modern CPU to be 2 - 6x fast than my sluggish cpu.   Thanks.


So for instance my mac X5130 rates at 12.7 CINT 2006  vs  28.6  

On Aug 27, 2011, at 2:57 PM, Slide wrote:

> I just ran on ubuntu 64bit with mono 2.10.1 and got better numbers than your 2.6.7. I had to run somewhere quick but will publish the numbers when I get back.
> 
> On Aug 27, 2011 11:16 AM, "Jonathan Shore" <jonathan.shore at gmail.com> wrote:
> > 
> > My machine is an old 2006 Mac Pro 1,1 2 x Xeon 5130 (64 bit) running OSX lion. Here are the respective versions of mono:
> > 
> > Mono on OSX:
> > 
> > Mono JIT compiler version 2.10.4 (tarball Mon Aug 8 22:03:39 EDT 2011)
> > Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
> > TLS: normal
> > SIGSEGV: normal
> > Notification: kqueue
> > Architecture: x86
> > Disabled: none
> > Misc: debugger softdebug 
> > LLVM: yes(2.9svn-mono)
> > GC: Included Boehm (with typed GC)
> > 
> > 
> > Mono on Ubuntu 11.04 (running in VMWare VM on same machine):
> > 
> > Mono JIT compiler version 2.6.7 (Debian 2.6.7-5ubuntu3)
> > Copyright (C) 2002-2010 Novell, Inc and Contributors. www.mono-project.com
> > TLS: __thread
> > GC: Included Boehm (with typed GC and Parallel Mark)
> > SIGSEGV: altstack
> > Notifications: epoll
> > Architecture: amd64
> > Disabled: none
> > 
> > 
> > Here is the Mac OSX mono 2.10.4 run:
> > 
> > $ mono main.exe 
> > Running benchmark
> > struct sum: 5000089998356.48, time: 9.010549 secs
> > class sum: 5000089998356.48, time: 30.67357 secs
> > 
> > Here is the Ubuntu 11.04 mono 2.6.7 run:
> > 
> > $ mono main.exe 
> > Running benchmark
> > struct sum: 5000089998356.48, time: 2.737732 secs
> > class sum: 5000089998356.48, time: 7.83984 secs
> > 
> > Note that the running time for mono 2.6.7 is ~4x faster than mono 2.10.4 on the same box (and the linux run has the disadvantage of running on a VM). The struct test is most likely not exercising the GC and the later is. I suspect given the consistent performance difference is *not* a GC issue, rather a difference in the JIT code generation. 
> > 
> > Let me know if there is other information I can provide. Thanks. 
> > 
> > Jonathan
> > 
> > On Aug 27, 2011, at 1:52 PM, Slide wrote:
> > 
> >> 
> >> 
> >> On Sat, Aug 27, 2011 at 10:27 AM, Jonathan Shore <jonathan.shore at gmail.com> wrote:
> >> Hi,
> >> 
> >> I was doing some benchmarks of struct vs class based creation (I have an application that will generate millions of small objects). I was doing the tests in a ubuntu 11.4 VM on my mac pro and found the following:
> >> 
> >> mono 2.6.7 was 4x faster on my linux VM than 2.10.4 running on OSX (same machine)
> >> 
> >> I don't know whether this may be because of one of the following:
> >> 
> >> - performance in 2.10.4 regressed vs 2.6.7
> >> - mono JIT implementation for OSX has a completely different JiT codebase and does not perform
> >> - difference in GC (only relevant for second part of the test)
> >> 
> >> Note that I tried this with separate compilations with mcs -optimize+ on both environments as well as running the same exe on both.
> >> 
> >> I can live with slower performance on OSX, but want to make sure that linux and windows versions of mono 2.10.x have the performance of 2.6.7 or better.
> >> 
> >> Can someone clue me in? I've included the simple test code with this posting.
> >> 
> >> Thanks
> >> 
> >> Jonathan
> >> 
> >> 
> >> 
> >> Can you publish your benchmark numbers and for what machines you are running on?
> >> 
> >> slide
> >> 
> >> -- 
> >> slide-o-blog
> >> http://slide-o-blog.blogspot.com/
> > 

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