Hi all,
I am using Xen C++ Api to connect to remote Xen server and get vif metrics
of a vm. But value 0 is returned for both read io and write io, while the
performance graph from XenServer interface shows me non 0 value...
Following is the function which I am using to get vif parameter of VM. I
have included error handling but control never goes to error condition...
Can any body suggest me what is the problem here...
Is it because, I am connecting to remote server or problem with the way I am
using Api ? Does Xen Api C++ support remote connection?
bool GetVMNwUtilisation(xen_vm vm, double& dreadIO, double& dwriteIO)
{
xen_vif_set* vif_set = new xen_vif_set[MAX_VIF_SIZE];
if(!(xen_vm_get_vifs(m_session, &vif_set, vm)))
{
cout << "Failed to get VM VIF " << endl;
return false;
}
double readIO = 0.0, double writeIO = 0.0;
for(int i=0; i<vif_set->size; i++)
{
xen_vif vif = vif_set->contents[i];
bool bAttached=false;
xen_vif_get_currently_attached(m_session, &bAttached, vif);
if(bAttached)
{
xen_vif_metrics vif_metrics;
if(!(xen_vif_get_metrics(m_session, &vif_metrics, vif)))
{
cout << "Err in xen_vif_get_metrics" << endl;
return false;
}
if (!(xen_vif_metrics_get_io_read_kbs(m_session,&readIO,vif_metrics)))
{
cout << "Err in xen_vif_metrics_get_io_read_kbs" << endl;
return false;
}
if (!(xen_vif_metrics_get_io_write_kbs(m_session,&writeIO,vif_metrics)))
{
cout << "Err in xen_vif_metrics_get_io_write_kbs" << endl;
return false;
}
dreadIO += readIO;
dwriteIO += writeIO;
}
}
cout << "Read IO : " << dreadIO << " Write IO " << dwriteIO << endl;
}
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