[PATCH 5/5] ext4: io stat show result in sysfs
From: Zheng Liu <hidden>
Date: 2011-10-31 09:43:04
Also in:
linux-fsdevel
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Wang Shaoyan <redacted> Show statistic results in sysfs Signed-off-by: Wang Shaoyan <redacted> --- fs/ext4/super.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 93ec9a7..049d06c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -2510,6 +2510,52 @@ static ssize_t inode_readahead_blks_store(struct ext4_attr *a, return count; } +static inline unsigned long ext4_get_ios_counter(int rw, int flag); +static ssize_t io_stats_show(struct ext4_attr *a, + struct ext4_sb_info *sbi, char *buf) +{ + int i = 0; + unsigned long ios_counters[EXT4_IOS_TYPE_END][2] = {{0,},}; + + for (i = 0; i < EXT4_IOS_TYPE_END; i++) { + ios_counters[i][READ] = ext4_get_ios_counter(READ, i); + ios_counters[i][WRITE] = ext4_get_ios_counter(WRITE, i); + } + + return snprintf(buf, PAGE_SIZE, + "TYPE READ WRITE\n" + "super block %8lu %8lu\n" + "group descriptor %8lu %8lu\n" + "inode bitmap %8lu %8lu\n" + "block bitmap %8lu %8lu\n" + "inode table %8lu %8lu\n" + "extent block %8lu %8lu\n" + "indirect block %8lu %8lu\n" + "dir entry %8lu %8lu\n" + "extended attribute %8lu %8lu\n" + "regular data %8lu %8lu\n", + ios_counters[EXT4_IOS_SUPER_BLOCK][READ], + ios_counters[EXT4_IOS_SUPER_BLOCK][WRITE], + ios_counters[EXT4_IOS_GROUP_DESC][READ], + ios_counters[EXT4_IOS_GROUP_DESC][WRITE], + ios_counters[EXT4_IOS_INODE_BITMAP][READ], + ios_counters[EXT4_IOS_INODE_BITMAP][WRITE], + ios_counters[EXT4_IOS_BLOCK_BITMAP][READ], + ios_counters[EXT4_IOS_BLOCK_BITMAP][WRITE], + ios_counters[EXT4_IOS_INODE_TABLE][READ], + ios_counters[EXT4_IOS_INODE_TABLE][WRITE], + ios_counters[EXT4_IOS_EXTENT_BLOCK][READ], + ios_counters[EXT4_IOS_EXTENT_BLOCK][WRITE], + ios_counters[EXT4_IOS_INDIRECT_BLOCK][READ], + ios_counters[EXT4_IOS_INDIRECT_BLOCK][WRITE], + ios_counters[EXT4_IOS_DIR_ENTRY][READ], + ios_counters[EXT4_IOS_DIR_ENTRY][WRITE], + ios_counters[EXT4_IOS_EXTENDED_ATTR][READ], + ios_counters[EXT4_IOS_EXTENDED_ATTR][WRITE], + ios_counters[EXT4_IOS_REGULAR_DATA][READ], + ios_counters[EXT4_IOS_REGULAR_DATA][WRITE]); +} + static ssize_t sbi_ui_show(struct ext4_attr *a, struct ext4_sb_info *sbi, char *buf) {
@@ -2553,6 +2599,7 @@ EXT4_RO_ATTR(session_write_kbytes); EXT4_RO_ATTR(lifetime_write_kbytes); EXT4_RO_ATTR(extent_cache_hits); EXT4_RO_ATTR(extent_cache_misses); +EXT4_RO_ATTR(io_stats); EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, inode_readahead_blks_store, s_inode_readahead_blks); EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
@@ -2579,6 +2626,7 @@ static struct attribute *ext4_attrs[] = { ATTR_LIST(mb_stream_req), ATTR_LIST(mb_group_prealloc), ATTR_LIST(max_writeback_mb_bump), + ATTR_LIST(io_stats), NULL, };
--
1.7.4.1