Messages in this thread | | | Date | Fri, 18 Jul 2008 14:25:18 -0700 (PDT) | From | Ranjit Manomohan <> | Subject | [PATCH 0/2] Traffic control cgroups subsystem |
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This set of patches provides a simple resource controller (cgroup_tc) based on the cgroups infrastructure to manage network traffic. The cgroup_tc resource controller can be used to schedule and shape traffic belonging to the task(s) in a particular cgroup.
The implementation consists of two parts:
1) A resource controller (cgroup_tc) that is used to associate packets from a particular task belonging to a cgroup with a traffic control class id ( tc_classid). This tc_classid is propagated to all sockets created by tasks in the cgroup and from there to all packets associated with those sockets.
2) A new traffic control classifier (cls_cgroup) that can classify packets based on the tc_classid field in the packet to specific destination classes.
A simple example of the use of this resource controller would be to limit the traffic from all tasks from a file_server cgroup to 100Mbps. We could achieve this by doing:
# make a cgroup of file transfer processes and assign it a uniqe classid # of 0x1234 mkdir -p /dev/cgroup mount -t cgroup tc -otc /dev/cgroup mkdir /dev/cgroup/file_transfer echo 0x1234 > /dev/cgroup/file_transfer/tc.classid echo $PID_OF_FILE_XFER_PROCESS > /dev/cgroup/file_transfer/tasks
# Now create a HTB class that rate limits traffic to 100mbits and attach # a filter to direct all traffic from cgroup file_transfer to this new class. tc qdisc add dev eth0 root handle 1: htb tc class add dev eth0 parent 1: classid 1:2 htb rate 100mbit ceil 100mbit tc filter add dev eth0 parent 1: protocol ip prio 1 handle 800 cgroup value 0x1234 classid 1:2
Signed-off-by: Ranjit Manomohan <ranjitm@google.com>
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