From 296c355cd6443d89fa251885a8d78778fe111dc4 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Wed, 30 Sep 2009 00:32:42 -0400 Subject: ext4: Use tracepoints for mb_history trace file The /proc/fs/ext4//mb_history was maintained manually, and had a number of problems: it required a largish amount of memory to be allocated for each ext4 filesystem, and the s_mb_history_lock introduced a CPU contention problem. By ripping out the mb_history code and replacing it with ftrace tracepoints, and we get more functionality: timestamps, event filtering, the ability to correlate mballoc history with other ext4 tracepoints, etc. Signed-off-by: "Theodore Ts'o" --- include/trace/events/ext4.h | 163 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) (limited to 'include') diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 7c6bbb7198a..b8320256dc5 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -743,6 +743,169 @@ TRACE_EVENT(ext4_alloc_da_blocks, __entry->data_blocks, __entry->meta_blocks) ); +TRACE_EVENT(ext4_mballoc_alloc, + TP_PROTO(struct ext4_allocation_context *ac), + + TP_ARGS(ac), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( __u16, found ) + __field( __u16, groups ) + __field( __u16, buddy ) + __field( __u16, flags ) + __field( __u16, tail ) + __field( __u8, cr ) + __field( __u32, orig_logical ) + __field( int, orig_start ) + __field( __u32, orig_group ) + __field( int, orig_len ) + __field( __u32, goal_logical ) + __field( int, goal_start ) + __field( __u32, goal_group ) + __field( int, goal_len ) + __field( __u32, result_logical ) + __field( int, result_start ) + __field( __u32, result_group ) + __field( int, result_len ) + ), + + TP_fast_assign( + __entry->dev = ac->ac_inode->i_sb->s_dev; + __entry->ino = ac->ac_inode->i_ino; + __entry->found = ac->ac_found; + __entry->flags = ac->ac_flags; + __entry->groups = ac->ac_groups_scanned; + __entry->buddy = ac->ac_buddy; + __entry->tail = ac->ac_tail; + __entry->cr = ac->ac_criteria; + __entry->orig_logical = ac->ac_o_ex.fe_logical; + __entry->orig_start = ac->ac_o_ex.fe_start; + __entry->orig_group = ac->ac_o_ex.fe_group; + __entry->orig_len = ac->ac_o_ex.fe_len; + __entry->goal_logical = ac->ac_g_ex.fe_logical; + __entry->goal_start = ac->ac_g_ex.fe_start; + __entry->goal_group = ac->ac_g_ex.fe_group; + __entry->goal_len = ac->ac_g_ex.fe_len; + __entry->result_logical = ac->ac_f_ex.fe_logical; + __entry->result_start = ac->ac_f_ex.fe_start; + __entry->result_group = ac->ac_f_ex.fe_group; + __entry->result_len = ac->ac_f_ex.fe_len; + ), + + TP_printk("dev %s inode %lu orig %u/%d/%u@%u goal %u/%d/%u@%u " + "result %u/%d/%u@%u blks %u grps %u cr %u flags 0x%04x " + "tail %u broken %u", + jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino, + __entry->orig_group, __entry->orig_start, + __entry->orig_len, __entry->orig_logical, + __entry->goal_group, __entry->goal_start, + __entry->goal_len, __entry->goal_logical, + __entry->result_group, __entry->result_start, + __entry->result_len, __entry->result_logical, + __entry->found, __entry->groups, __entry->cr, + __entry->flags, __entry->tail, + __entry->buddy ? 1 << __entry->buddy : 0) +); + +TRACE_EVENT(ext4_mballoc_prealloc, + TP_PROTO(struct ext4_allocation_context *ac), + + TP_ARGS(ac), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( __u32, orig_logical ) + __field( int, orig_start ) + __field( __u32, orig_group ) + __field( int, orig_len ) + __field( __u32, result_logical ) + __field( int, result_start ) + __field( __u32, result_group ) + __field( int, result_len ) + ), + + TP_fast_assign( + __entry->dev = ac->ac_inode->i_sb->s_dev; + __entry->ino = ac->ac_inode->i_ino; + __entry->orig_logical = ac->ac_o_ex.fe_logical; + __entry->orig_start = ac->ac_o_ex.fe_start; + __entry->orig_group = ac->ac_o_ex.fe_group; + __entry->orig_len = ac->ac_o_ex.fe_len; + __entry->result_logical = ac->ac_b_ex.fe_logical; + __entry->result_start = ac->ac_b_ex.fe_start; + __entry->result_group = ac->ac_b_ex.fe_group; + __entry->result_len = ac->ac_b_ex.fe_len; + ), + + TP_printk("dev %s inode %lu orig %u/%d/%u@%u result %u/%d/%u@%u", + jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino, + __entry->orig_group, __entry->orig_start, + __entry->orig_len, __entry->orig_logical, + __entry->result_group, __entry->result_start, + __entry->result_len, __entry->result_logical) +); + +TRACE_EVENT(ext4_mballoc_discard, + TP_PROTO(struct ext4_allocation_context *ac), + + TP_ARGS(ac), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( __u32, result_logical ) + __field( int, result_start ) + __field( __u32, result_group ) + __field( int, result_len ) + ), + + TP_fast_assign( + __entry->dev = ac->ac_inode->i_sb->s_dev; + __entry->ino = ac->ac_inode->i_ino; + __entry->result_logical = ac->ac_b_ex.fe_logical; + __entry->result_start = ac->ac_b_ex.fe_start; + __entry->result_group = ac->ac_b_ex.fe_group; + __entry->result_len = ac->ac_b_ex.fe_len; + ), + + TP_printk("dev %s inode %lu extent %u/%d/%u@%u ", + jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino, + __entry->result_group, __entry->result_start, + __entry->result_len, __entry->result_logical) +); + +TRACE_EVENT(ext4_mballoc_free, + TP_PROTO(struct ext4_allocation_context *ac), + + TP_ARGS(ac), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( __u32, result_logical ) + __field( int, result_start ) + __field( __u32, result_group ) + __field( int, result_len ) + ), + + TP_fast_assign( + __entry->dev = ac->ac_inode->i_sb->s_dev; + __entry->ino = ac->ac_inode->i_ino; + __entry->result_logical = ac->ac_b_ex.fe_logical; + __entry->result_start = ac->ac_b_ex.fe_start; + __entry->result_group = ac->ac_b_ex.fe_group; + __entry->result_len = ac->ac_b_ex.fe_len; + ), + + TP_printk("dev %s inode %lu extent %u/%d/%u@%u ", + jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino, + __entry->result_group, __entry->result_start, + __entry->result_len, __entry->result_logical) +); + #endif /* _TRACE_EXT4_H */ /* This part must be outside protection */ -- cgit v1.2.3-18-g5258