>
> Regards--
> Subrata
>
> On Fri, Jul 25, 2008 at 5:03 AM, Ranjit Manomohan <ranjitm@google.com>
> wrote:
> [Take 4] incorporated additional comments from Patrick McHardy
>
> This patch 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 will be used for classifying packets at
> the link layer.
>
> 2) A new traffic control classifier (cls_cgroup) that can
> classify packets
> based on the tc_classid field in the socket to specific
> destination classes.
>
> An 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
> arbitrary unique
> # classid of 0x1234 - this will be used later to direct
> packets.
> 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 1:10 htb rate 100mbit
> ceil 100mbit
> tc filter add dev eth0 parent 1: handle 800 protocol ip prio 1
> cgroup value 0x1234 classid 1:10
>
> Signed-off-by: Ranjit Manomohan <ranjitm@google.com>
>
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> --
> Regards & Thanks--
> Subrata
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