On 08/10/2011 02:55 AM, Upendra Moturi wrote:

Hi,

does this patch solve your problem? I am setting the MTU to fixed 2kb. Doing tests with scp seems to indicate that this improved the situation -- at least for me.

  Stefan

Signed-off-by: Stefan Berger <stef...@linux.vnet.ibm.com>

---
 src/util/network.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

Index: libvirt-acl/src/util/network.c
===================================================================
--- libvirt-acl.orig/src/util/network.c
+++ libvirt-acl/src/util/network.c
@@ -1156,8 +1156,8 @@ virBandwidthEnable(virBandwidthPtr bandw

         virCommandFree(cmd);
         cmd = virCommandNew(TC);
- virCommandAddArgList(cmd,"class", "add", "dev", iface, "parent",
-                                 "1:", "classid", "1:1", "htb", NULL);
+        virCommandAddArgList(cmd,"class", "add", "dev", iface, "parent",
+                             "1:", "classid", "1:1", "htb", NULL);
         virCommandAddArgList(cmd, "rate", average, NULL);

         if (peak)
@@ -1170,9 +1170,9 @@ virBandwidthEnable(virBandwidthPtr bandw

         virCommandFree(cmd);
         cmd = virCommandNew(TC);
- virCommandAddArgList(cmd,"filter", "add", "dev", iface, "parent", - "1:0", "protocol", "ip", "handle", "1", "fw",
-                                 "flowid", "1", NULL);
+        virCommandAddArgList(cmd,"filter", "add", "dev", iface, "parent",
+                             "1:0", "protocol", "ip", "handle", "1", "fw",
+                             "flowid", "1", NULL);

         if (virCommandRun(cmd, NULL) < 0)
             goto cleanup;
@@ -1191,8 +1191,8 @@ virBandwidthEnable(virBandwidthPtr bandw

         virCommandFree(cmd);
         cmd = virCommandNew(TC);
-            virCommandAddArgList(cmd, "qdisc", "add", "dev", iface,
-                                 "ingress", NULL);
+        virCommandAddArgList(cmd, "qdisc", "add", "dev", iface,
+                             "ingress", NULL);

         if (virCommandRun(cmd, NULL) < 0)
             goto cleanup;
@@ -1202,7 +1202,7 @@ virBandwidthEnable(virBandwidthPtr bandw
         virCommandAddArgList(cmd, "filter", "add", "dev", iface, "parent",
"ffff:", "protocol", "ip", "u32", "match", "ip", "src", "0.0.0.0/0", "police", "rate", average, - "burst", burst, "mtu", burst, "drop", "flowid", + "burst", burst, "mtu", "2kb", "drop", "flowid",
                              ":1", NULL);

         if (virCommandRun(cmd, NULL) < 0)


small correction
it is not mbps ,it is MBps

On Wed, Aug 10, 2011 at 12:06 PM, Upendra Moturi <upendr...@hexagrid.com <mailto:upendr...@hexagrid.com>> wrote:

    Hi

    I am using 0.9.4 version of libvirt and want to limit bandwidth.
    I installed libvirt on ubuntu 11.04 using libvirt source.

    For this i am using the QOS configuration

    <devices>
         <interface type='network'>

           <source network='default'/>
           <target dev='vnet0'/>
           *<bandwidth>
             <inbound average='1000' peak='5000' burst='1024'/>
             <outbound average='128' peak='256' burst='256'/>


           </bandwidth>*
         </interface>


    Here the inbound limit is working properly but the outbound is
    limiting but not with values which is give

    Here are the scenarios i tested and the results

    when i gave average as 2048 --- it is limiting with 600 -- 700 kb

    average                           result
    =====================
    2048   (2mpbs)                  600-700 kb
    4096   (4mbps)                  1 MB/s
    10240 (10mbps)                2-3 MB/s
    12288 (12 mbps)               3-4 MB/s
    20480 (20 mbps)               16-18 MB/s

    Is this the expected behavior or some thing is missing
    If this is the expected behavior ,then in what ratio it is limiting.

    Please help me
    Thanks in advance.

-- Thanks and Regards,
    Upendra.M




--
Thanks and Regards,
Upendra.M


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