Folks, one more thing, when I run pi_stess, I got on console: sched: RT throttling activated After I set root to be ext2, the result is very similar: root@beagleboard:~/rt-tests# cat /proc/latency_stats Latency Top version : v0.1 18 2317 387 do_wait sys_wait4 ret_fast_syscall 2 864 447 n_tty_read tty_read vfs_read sys_read ret_fast_syscall 1 1043 1043 sync_page __lock_page do_read_cache_page read_cache_page_async read_cache_page ext2_get_page ext2_readdir vfs_readdir sys_getdents64 ret_fast 3 2115 715 sync_buffer __wait_on_buffer __bread ext2_get_inode ext2_iget ext2_lookup do_lookup link_path_walk path_walk do_path_lookup user_path_at vfs_f 1 3457 3457 sync_buffer __wait_on_buffer __bread ext2_get_branch ext2_get_block do_mpage_readpage mpage_readpages ext2_readpages __do_page_cache_readahea 1 3695 3695 sync_page __lock_page find_lock_page filemap_fault __do_fault handle_mm_fault do_page_fault do_translation_fault do_DataAbort __dabt_svc __cl 1 1951545 1951545 sync_page wait_on_page_bit truncate_inode_pages_range truncate_inode_pages truncate_pagecache vmtruncate inode_setattr ext2_setattr not 1 119 119 get_signal_to_deliver do_notify_resume work_pending Thanks, Maksym. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
