Messages in this thread | | | Date | Mon, 21 Apr 2003 09:01:59 -0700 | From | "Martin J. Bligh" <> | Subject | 2.5.67-mm1 vs 2.5.68-mm1 |
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I think the vma sorting is hurting (contention on i_shared_sem). It also only gains a factor of about 2 in the corner case you were worried about ... any ideas on ways to make it cheaper? We need something more dramatic anyway (though the other solutions I have revolve around the same contention problem ;-( ) I just backed it out for now in my stuff.
Note systimes on kernel compiles, and SDET throughput.
M.
Kernbench: (make -j N vmlinux, where N = 2 x num_cpus) Elapsed System User CPU 2.5.67-mm1 44.02 80.92 567.78 1473.00 2.5.68-mm1 44.14 82.82 567.21 1472.25
Kernbench: (make -j N vmlinux, where N = 16 x num_cpus) Elapsed System User CPU 2.5.67-mm1 44.76 89.40 576.67 1487.50 2.5.68-mm1 44.84 95.52 576.48 1498.25
Kernbench: (make -j vmlinux, maximal tasks) Elapsed System User CPU 2.5.67-mm1 44.77 87.34 576.85 1482.75 2.5.68-mm1 45.18 96.24 576.75 1489.75
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 2.5.67-mm1 100.0% 2.2% 2.5.68-mm1 103.5% 2.3%
SDET 2 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 3.9% 2.5.68-mm1 101.8% 2.7%
SDET 4 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.9% 2.5.68-mm1 98.7% 2.3%
SDET 8 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.9% 2.5.68-mm1 96.9% 0.9%
SDET 16 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.8% 2.5.68-mm1 89.7% 0.2%
SDET 32 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.3% 2.5.68-mm1 76.6% 0.4%
SDET 64 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.3% 2.5.68-mm1 75.5% 0.1%
SDET 128 (see disclaimer) Throughput Std. Dev 2.5.67-mm1 100.0% 0.2% 2.5.68-mm1 78.7% 0.2%
diffprofile 2.5.6{7,8}-mm1/kernbench/0/profile 6159 4.4% total 3786 0.0% move_vma_start 3158 3222.4% __vma_link 762 8466.7% __down 522 293.3% may_open 478 16.5% zap_pte_range 458 74.2% __wake_up 438 13.2% find_get_page 400 102.3% remove_shared_vm_struct 332 23.1% schedule 282 0.0% install_page 257 4.9% __copy_to_user_ll 255 7.7% __copy_from_user_ll 198 47.9% copy_page_range 133 21.6% sys_brk 115 5.2% page_remove_rmap ... -100 -0.7% do_anonymous_page -100 -8.3% file_move -127 -10.7% link_path_walk -128 -6.5% path_lookup -179 -2.2% __d_lookup -224 -72.3% do_lookup -433 -21.4% do_page_fault -447 -57.7% filemap_nopage -493 -25.1% do_no_page -535 -85.3% dentry_open -776 -38.5% page_add_rmap -2452 -4.8% default_idle
diffprofile 2.5.6{7,8}-mm1/sdetbench/128/profile 117130 18.0% total 92204 26.2% default_idle 28537 962.5% __down 9253 378.1% schedule 9119 596.4% __wake_up 6573 0.0% move_vma_start 4587 1176.2% __vma_link 1899 45.7% remove_shared_vm_struct 1805 47.2% do_wp_page 1467 11.0% copy_page_range 978 30.6% copy_mm 506 68.2% vma_link 490 0.0% install_page 395 411.5% rb_insert_color 354 2.0% zap_pte_range 347 55.3% task_mem 320 29.4% __block_prepare_write 314 52.7% may_open 313 2235.7% cpu_idle 304 33.6% __copy_user_intel 294 490.0% default_wake_function 276 8.2% do_anonymous_page 219 509.3% __vma_link_rb ... -206 -17.5% ext2_new_inode -208 -14.1% number -208 -100.0% pid_revalidate -209 -22.9% update_atime -214 -41.9% d_path -222 -26.7% proc_root_link -231 -20.0% __mark_inode_dirty -234 -13.9% release_task -238 -10.5% do_page_fault -244 -47.7% ext2_new_block -253 -1.8% page_remove_rmap -259 -62.3% do_lookup -271 -22.7% file_kill -287 -39.9% ext2_get_group_desc -289 -15.7% __find_get_block -292 -43.4% __find_get_block_slow -292 -30.4% dput -296 -21.0% __brelse -312 -36.4% d_instantiate -313 -12.6% link_path_walk -348 -39.1% prune_dcache -352 -18.6% current_kernel_time -358 -24.4% fd_install -369 -25.7% __fput -410 -34.9% flush_signal_handlers -424 -28.0% .text.lock.highmem -450 -65.5% dentry_open -456 -24.4% d_alloc -475 -45.0% proc_check_root -525 -21.6% file_move -555 -21.0% proc_pid_stat -631 -38.6% grab_block -643 -49.5% .text.lock.attr -648 -7.6% release_pages -675 -45.0% .text.lock.file_table -718 -47.7% .text.lock.base -749 -27.9% kmem_cache_free -788 -48.2% __read_lock_failed -882 -38.5% filemap_nopage -918 -35.3% path_release -947 -20.8% .text.lock.filemap -994 -22.3% do_no_page -1037 -93.8% task_vsize -1068 -13.1% page_add_rmap -1591 -13.8% __d_lookup -1830 -27.6% path_lookup -2116 -61.3% .text.lock.namei -2399 -39.5% follow_mount -2987 -61.0% .text.lock.dcache -3705 -38.0% atomic_dec_and_lock -4444 -61.7% .text.lock.dec_and_lock
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