[libvirt] problem with outbound limiting

[Stefan Berger]

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 <stefanb at 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 
> <upendra.m at hexagrid.com <mailto:upendra.m at 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
>
>
> --
> libvir-list mailing list
> libvir-list at redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list

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