Le jeu 20/04/2006 à 16:39, Laurent Vivier a écrit : > The functions added by my patch are following and as they are atomic > (one machine instruction) they are not measurable and don't appears in > oprofile. > > atomic_long_add > atomic_long_read > atomic_long_set > atomic_long_inc I think, as these commands are atomic/inlined we should measure the time of the functions modified by the patches. The functions modified by the patch are: ext3_free_blocks_sb ext3_has_free_blocks ext3_new_block ext3_put_super ext3_fill_super ext3_fill_super ext3_free_inode find_group_dir find_group_orlov ext3_new_inode ext3_group_add If we make a "grep" on tiobench oprofile.out, we have: atomic_t: 26919 0.0119 vmlinux vmlinux ext3_new_block 2195 9.7e-04 vmlinux vmlinux ext3_free_blocks_sb 1192 5.2e-04 vmlinux vmlinux ext3_has_free_blocks 189 8.3e-05 vmlinux vmlinux ext3_new_inode 40 1.8e-05 vmlinux vmlinux ext3_free_inode 2 8.8e-07 vmlinux vmlinux find_group_orlov percpu_counter: 16290 0.0067 vmlinux vmlinux ext3_new_block 2075 8.5e-04 vmlinux vmlinux ext3_free_blocks_sb 428 1.8e-04 vmlinux vmlinux ext3_has_free_blocks 162 6.7e-05 vmlinux vmlinux ext3_new_inode 25 1.0e-05 vmlinux vmlinux ext3_free_inode As we can using atomic_long_t is slower than percpu_counter so ... forget my patch. Regards, Laurent -- Laurent Vivier Bull, Architect of an Open World (TM) http://www.bullopensource.org/ext4
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