#9019: add iotop utility
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Reporter: Prasad | Owner: nobody
Type: enhancement | Status: new
Priority: normal | Milestone: Unscheduled
Component: Applications/Command Line Tools | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking: 16255
Platform: All |
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Description changed by diver:
Old description:
iotop is a simple top like utility for monitoring IOs. For utility to
work, kernel must do IO accounting for each process. The patch adds
struct io_accounting in the kernel account for IOs performed by each
process.
The accounting for IO is performed in various version of read and
write system calls.
The userland part (iotop command) uses team_info mechanism to get
the accounting information in the userland. The utility provides user
with lots of options like
- monitoring processes of particular user
- monitoring processes based on process ids
- only showing processes doing actual IOs
- configuration refreshing delay
iotop also allows user to sort the output on various parameters
dynamically while running.
The utility also checks the visible terminal co-ordinates and updates
the output accordingly.
Here is a sample output of the iotop:
~> ./iotop
Total Disk Reads: 2.00 B/s | Total Disk Writes: 0.00 B/s
TID USER READ BW WRITE BW IO % Command
114 user 2.00 B/s 0.00 B/s 100.00 %
/boot/system/servers/power_daemon
48 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/registrar
55 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/debug_server
56 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/net_server
57 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/app_server
72 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/syslog_daemon
84 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/input_server
94 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/mount_server
106 user 0.00 B/s 0.00 B/s 0.00 % /boot/system/Tracker
107 user 0.00 B/s 0.00 B/s 0.00 % /boot/system/Deskbar
108 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/media_server
109 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/midi_server
110 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/print_server
112 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/cddb_daemon
113 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/notification_server
143 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/servers/media_addon_server
193 user 0.00 B/s 0.00 B/s 0.00 %
/boot/system/apps/Terminal
197 user 0.00 B/s 0.00 B/s 0.00 % /bin/bash -l
1 user 0.00 B/s 0.00 B/s 0.00 % kernel_team
212 user 0.00 B/s 0.00 B/s 0.00 % ./iotop
-----------------------------------------------------------------------
User: all
Processes: all
Sorted according to 'Percentage of total IOs'. Reverse Sorting: false
Refreshing every 3 seconds.
~> ./iotop -o
Total Disk Reads: 2.00 B/s | Total Disk Writes: 0.00 B/s
TID USER READ BW WRITE BW IO % Command
114 user 2.00 B/s 0.00 B/s 100.00 %
/boot/system/servers/power_daemon
-----------------------------------------------------------------------
User: all
Processes: all
Only showing processes doing IOs.
Sorted according to 'Percentage of total IOs'. Reverse Sorting: false
Refreshing every 3 seconds.
