[LLVMdev] darwin dragon-egg build issues

Duncan Sands
Mon, 19 Apr 2010 09:08:50 -0000

Hi Jack,

>      Do a quick check here on x86_64-apple-darwin10
> with svn llvm and svn dragon-egg against release gcc 4.5.0,
> the results from the himenoBMTxpa benchmark compiled at -O3
> look pretty good. With stock gcc-4.5.0, we get...

thanks for these numbers.  How do they compare with llvm-gcc and/or clang?

Ciao,

Duncan.

>
> Grid-size = M
>
> mimax = 128 mjmax = 128 mkmax = 256
> imax = 127 jmax = 127 kmax =255
>   Start rehearsal measurement process.
>   Measure the performance in 3 times.
>
>   MFLOPS: 156.560865 time(s): 2.575476 1.733593e-03
>
>   Now, start the actual measurement process.
>   The loop will be excuted in 69 times
>   This will take about one minute.
>   Wait for a while
>
>   Loop executed for 69 times
>   Gosa : 1.449961e-03
>   MFLOPS measured : 156.771134	cpu : 59.156498
>   Score based on Pentium III 600MHz using Fortran 77: 1.911843
>
> and for the same through the plugin we get...
>
> Grid-size = M
>
> mimax = 128 mjmax = 128 mkmax = 256
> imax = 127 jmax = 127 kmax =255
>   Start rehearsal measurement process.
>   Measure the performance in 3 times.
>
>   MFLOPS: 151.130276 time(s): 2.668021 1.733593e-03
>
>   Now, start the actual measurement process.
>   The loop will be excuted in 67 times
>   This will take about one minute.
>   Wait for a while
>
>   Loop executed for 67 times
>   Gosa : 1.452966e-03
>   MFLOPS measured : 151.208295	cpu : 59.555058
>   Score based on Pentium III 600MHz using Fortran 77: 1.844004
>
> So dragon-egg is less than 5% slower.
>              Jack