Re: [PATCH] anobjrmap 1/6 objrmap

--Andrea Arcangeli <andrea@suse.de> wrote (on Wednesday, March 24, 2004 07:19:57 +0100):

> On Mon, Mar 22, 2004 at 07:53:02AM -0800, Martin J. Bligh wrote:
>> Just against 2.6.5-rc1 virgin is easiest - that's what I was doing the
>> rest of it against ...
> 
> here it is:
> 
> 	http://www.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.6/2.6.5-rc1/anon-vma-2.6.5-rc2-aa2.gz
> 	http://www.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.6/2.6.5-rc1/objrmap-core-2.6.5-rc2-aa2.gz
> 
> 

Yay, that works ;-) Without the rest of your tree, performance of anon_vma
is almost exactly = anon_mm ... of course all this is under no mem pressure,
I'll have to do some more tests on another machine without infinite ram to
see what happens as we start to reclaim ;-)

Kernbench: (make -j N vmlinux, where N = 2 x num_cpus)
                              Elapsed      System        User         CPU
                2.6.5-rc1       45.75      102.49      577.39     1486.00
        2.6.5-rc1-partial       44.84       85.75      576.63     1476.67
           2.6.5-rc1-hugh       44.79       83.85      576.71     1474.67
       2.6.5-rc1-anon_vma       44.66       83.69      577.14     1479.00
            2.6.5-rc1-aa3       44.57       81.57      577.45     1477.67

Kernbench: (make -j N vmlinux, where N = 16 x num_cpus)
                              Elapsed      System        User         CPU
                2.6.5-rc1       46.99      121.95      580.82     1495.33
        2.6.5-rc1-partial       45.09       97.16      579.59     1501.00
           2.6.5-rc1-hugh       45.00       95.45      579.05     1498.67
       2.6.5-rc1-anon_vma       44.90       96.17      579.60     1503.67
            2.6.5-rc1-aa3       45.03       93.27      579.84     1494.33

Kernbench: (make -j vmlinux, maximal tasks)
                              Elapsed      System        User         CPU
                2.6.5-rc1       46.96      122.43      580.65     1495.00
        2.6.5-rc1-partial       45.18       93.60      579.10     1488.33
           2.6.5-rc1-hugh       44.89       91.04      578.49     1490.33
       2.6.5-rc1-anon_vma       44.92       91.96      578.86     1493.33
            2.6.5-rc1-aa3       44.77       89.29      578.61     1491.33


DISCLAIMER: SPEC(tm) and the benchmark name SDET(tm) are registered
trademarks of the Standard Performance Evaluation Corporation. This 
benchmarking was performed for research purposes only, and the run results
are non-compliant and not-comparable with any published results.

Results are shown as percentages of the first set displayed

SDET 1  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         3.0%
        2.6.5-rc1-partial       101.4%         1.3%
           2.6.5-rc1-hugh       100.0%         2.9%
       2.6.5-rc1-anon_vma       101.4%         1.9%
            2.6.5-rc1-aa3       104.1%         4.0%

SDET 2  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         1.3%
        2.6.5-rc1-partial       107.7%         1.0%
           2.6.5-rc1-hugh       108.7%         1.5%
       2.6.5-rc1-anon_vma       109.5%         0.7%
            2.6.5-rc1-aa3       107.4%         1.3%

SDET 4  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.7%
        2.6.5-rc1-partial       110.5%         0.6%
           2.6.5-rc1-hugh       114.6%         1.3%
       2.6.5-rc1-anon_vma       113.3%         0.3%
            2.6.5-rc1-aa3       116.1%         1.5%

SDET 8  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.9%
        2.6.5-rc1-partial       119.4%         0.5%
           2.6.5-rc1-hugh       120.2%         1.1%
       2.6.5-rc1-anon_vma       119.6%         0.0%
            2.6.5-rc1-aa3       124.4%         0.2%

SDET 16  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.1%
        2.6.5-rc1-partial       118.1%         0.2%
           2.6.5-rc1-hugh       119.8%         0.4%
       2.6.5-rc1-anon_vma       119.9%         0.8%
            2.6.5-rc1-aa3       122.1%         1.1%

SDET 32  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.2%
        2.6.5-rc1-partial       119.2%         1.0%
           2.6.5-rc1-hugh       120.4%         0.4%
       2.6.5-rc1-anon_vma       121.8%         0.6%
            2.6.5-rc1-aa3       121.1%         0.8%

SDET 64  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.3%
        2.6.5-rc1-partial       122.1%         0.5%
           2.6.5-rc1-hugh       123.5%         0.4%
       2.6.5-rc1-anon_vma       123.3%         0.8%
            2.6.5-rc1-aa3       123.0%         0.6%

SDET 128  (see disclaimer)
                           Throughput    Std. Dev
                2.6.5-rc1       100.0%         0.2%
        2.6.5-rc1-partial       123.1%         0.4%
           2.6.5-rc1-hugh       124.7%         0.7%
       2.6.5-rc1-anon_vma       123.9%         0.3%
            2.6.5-rc1-aa3       124.4%         0.1%


For interest's sake, here's the diffprofile for kernbench from
anon_mm to the whole -aa tree ...

      3808  25386.7% find_trylock_page
       568  2704.8% pgd_alloc
       273    74.2% dentry_open
       125    11.2% file_move
       106    23.1% do_page_cache_readahead
        64     0.5% do_anonymous_page
...
       -64    -1.0% __copy_to_user_ll
       -66   -12.2% .text.lock.file_table
       -72    -0.8% __d_lookup
       -78    -3.9% path_lookup
       -84   -14.9% kmap_atomic
       -92   -11.0% pte_alloc_one
       -97   -13.7% generic_file_open
      -106   -11.2% kmem_cache_free
      -121   -13.2% release_pages
      -126   -12.6% page_add_rmap
      -137   -12.9% clear_page_tables
      -212    -7.2% zap_pte_range
      -235  -100.0% radix_tree_lookup
      -239   -12.5% buffered_rmqueue
      -268   -17.8% link_path_walk
      -291  -100.0% .text.lock.filemap
      -397   -20.8% page_remove_rmap
      -398  -100.0% pgd_ctor
      -461   -21.6% do_no_page
      -669    -1.4% default_idle
     -3508    -2.5% total
     -3719   -99.4% find_get_page

zap_pte_range and page_remove_rmap and do_no_page are cheaper ... are we 
setting up and tearing down pages less frequently somehow? Would be 
curious to know which patch that is ...

M.

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