Re: [eigen] 3.0.4 coming soon, testing appreciated

[Rhys Ulerich <rhys.ulerich@xxxxxxxxx>]

>>> I see
>>>   icpc 12.0.4 20110427
>>>   icpc 12.1.0 20111011
>>> both build all the 'make check' targets.  I noticed some terribly long
>>> individual test times for those two builds...

>> Can you profile this?
>> Is Eigen 3.0.3 performing better?

> I'm building the outer product of {Intel 11.1 latest,
> Intel 12.1 latest} and {3.0.3 release, 3.0 tip} ...
> to get better test case timing info.

Here's gross timing information from a release build with
-fno-omit-frame-pointer executing 'EIGEN_REPEAT=100 ./check.sh
product_trmm_.' on a quiet x86_64 Linux system.  Notice the repeat
count of 100.  I picked those tests as they popped up as slow when I
initially ran make check on a login node earlier in this discussion.

Versions are icpc (ICC) 11.1 20100806 and icpc (ICC) 12.1.0 20111011.

Test project /g/g10/ulerich1/Build/build-3.0.3-intel-11.1
1/4 Test #215: product_trmm_1 ...................   Passed   14.28 sec
2/4 Test #216: product_trmm_2 ...................   Passed   17.99 sec
3/4 Test #217: product_trmm_3 ...................   Passed   75.14 sec
4/4 Test #218: product_trmm_4 ...................   Passed   36.13 sec

Test project /g/g10/ulerich1/Build/build-3.0.4-intel-11.1
1/4 Test #215: product_trmm_1 ...................   Passed   19.55 sec
2/4 Test #216: product_trmm_2 ...................   Passed   24.53 sec
3/4 Test #217: product_trmm_3 ...................   Passed   87.97 sec
4/4 Test #218: product_trmm_4 ...................   Passed   32.09 sec

Test project /g/g10/ulerich1/Build/build-3.0.3-intel-12.1
1/4 Test #215: product_trmm_1 ...................   Passed   10.07 sec
2/4 Test #216: product_trmm_2 ...................   Passed   16.13 sec
3/4 Test #217: product_trmm_3 ...................   Passed   79.36 sec
4/4 Test #218: product_trmm_4 ...................   Passed   35.73 sec

Test project /g/g10/ulerich1/Build/build-3.0.4-intel-12.1
1/4 Test #215: product_trmm_1 ...................   Passed   12.57 sec
2/4 Test #216: product_trmm_2 ...................   Passed   19.36 sec
3/4 Test #217: product_trmm_3 ...................   Passed   86.88 sec
4/4 Test #218: product_trmm_4 ...................   Passed   27.58 sec

Good news: Across the board, Intel 12.1 does better than Intel 11.1 on
3.0 tip (what I called 3.0.4 above).

Bad news: On all of product_trmm_{1,2,3} the performance is worse on
3.0 tip than it was on 3.0.3 on both Intel 11.1 and 12.1.  In
particular, compare product_trmm_{1,2} on Intel 11.1.

I can do some more detailed profiling on product_trmm_{1,2,3} using
Intel 11.1.  Any preference for with which one I start?

- Rhys