split Filesystems Tools under Storage Tools

README.md

@@ -183,22 +183,25 @@ pair of .c and .py files, and some are directories of files.
 - tools/[biotop](tools/biotop.py): Top for disks: Summarize block device I/O by process. [Examples](tools/biotop_example.txt).
 - tools/[biopattern](tools/biopattern.py): Identify random/sequential disk access patterns. [Examples](tools/biopattern_example.txt).
 - tools/[biosnoop](tools/biosnoop.py): Trace block device I/O with PID and latency. [Examples](tools/biosnoop_example.txt).
-- tools/[btrfsdist](tools/btrfsdist.py): Summarize btrfs operation latency distribution as a histogram. [Examples](tools/btrfsdist_example.txt).
-- tools/[btrfsslower](tools/btrfsslower.py): Trace slow btrfs operations. [Examples](tools/btrfsslower_example.txt).
 - tools/[dirtop](tools/dirtop.py): File reads and writes by directory. Top for directories. [Examples](tools/dirtop_example.txt).
-- tools/[ext4dist](tools/ext4dist.py): Summarize ext4 operation latency distribution as a histogram. [Examples](tools/ext4dist_example.txt).
-- tools/[ext4slower](tools/ext4slower.py): Trace slow ext4 operations. [Examples](tools/ext4slower_example.txt).
 - tools/[filelife](tools/filelife.py): Trace the lifespan of short-lived files. [Examples](tools/filelife_example.txt).
 - tools/[filegone](tools/filegone.py): Trace why file gone (deleted or renamed). [Examples](tools/filegone_example.txt).
 - tools/[fileslower](tools/fileslower.py): Trace slow synchronous file reads and writes. [Examples](tools/fileslower_example.txt).
 - tools/[filetop](tools/filetop.py): File reads and writes by filename and process. Top for files. [Examples](tools/filetop_example.txt).
 - tools/[mdflush](tools/mdflush.py): Trace md flush events. [Examples](tools/mdflush_example.txt).
 - tools/[mountsnoop](tools/mountsnoop.py): Trace mount and umount syscalls system-wide. [Examples](tools/mountsnoop_example.txt).
+- tools/[virtiostat](tools/virtiostat.py): Show VIRTIO device IO statistics. [Examples](tools/virtiostat_example.txt).
+
+###### Filesystems Tools
+
+- tools/[btrfsdist](tools/btrfsdist.py): Summarize btrfs operation latency distribution as a histogram. [Examples](tools/btrfsdist_example.txt).
+- tools/[btrfsslower](tools/btrfsslower.py): Trace slow btrfs operations. [Examples](tools/btrfsslower_example.txt).
+- tools/[ext4dist](tools/ext4dist.py): Summarize ext4 operation latency distribution as a histogram. [Examples](tools/ext4dist_example.txt).
+- tools/[ext4slower](tools/ext4slower.py): Trace slow ext4 operations. [Examples](tools/ext4slower_example.txt).
 - tools/[nfsslower](tools/nfsslower.py): Trace slow NFS operations. [Examples](tools/nfsslower_example.txt).
 - tools/[nfsdist](tools/nfsdist.py): Summarize NFS operation latency distribution as a histogram. [Examples](tools/nfsdist_example.txt).
 - tools/[vfscount](tools/vfscount.py): Count VFS calls. [Examples](tools/vfscount_example.txt).
 - tools/[vfsstat](tools/vfsstat.py): Count some VFS calls, with column output. [Examples](tools/vfsstat_example.txt).
-- tools/[virtiostat](tools/virtiostat.py): Show VIRTIO device IO statistics. [Examples](tools/virtiostat_example.txt).
 - tools/[xfsdist](tools/xfsdist.py): Summarize XFS operation latency distribution as a histogram. [Examples](tools/xfsdist_example.txt).
 - tools/[xfsslower](tools/xfsslower.py): Trace slow XFS operations. [Examples](tools/xfsslower_example.txt).
 - tools/[zfsdist](tools/zfsdist.py): Summarize ZFS operation latency distribution as a histogram. [Examples](tools/zfsdist_example.txt).