netperf: implements dynamic NUMA binding

The test was taking the last NUMA node to
bind the VM's memory. In some systems the last
NUMA node could have no memory and/or CPUs
assigned, updates the test to take the first
valid node.

Signed-off-by: mcasquer <[email protected]>

generic/tests/cfg/netperf.cfg

@@ -1,6 +1,7 @@
 - netperf: install setup image_copy unattended_install.cdrom
     virt_test_type = qemu libvirt
     type = netperf
+    not_preprocess = yes
     kill_vm = yes
     image_snapshot = yes
     setup_ksm = no
@@ -32,7 +33,6 @@
     # bridge_force_create=yes
     # bridge_nic1 =
     #numa configration
-    numa_node = -1
     netperf_with_numa = yes
     # configure netperf test parameters, some seconds will be took to
     # wait all the clients work, this wait time should be less than

generic/tests/netperf.py

@@ -5,7 +5,15 @@
 import time
 
 from avocado.utils import process
-from virttest import error_context, remote, utils_misc, utils_net, utils_test, virt_vm
+from virttest import (
+    env_process,
+    error_context,
+    remote,
+    utils_misc,
+    utils_net,
+    utils_test,
+    virt_vm,
+)
 
 from provider import netperf_base, win_driver_utils
 
@@ -136,8 +144,24 @@ def mtu_set(mtu):
                         "The ethenet device does not support jumbo," "cancel test"
                     )
 
-    vm = env.get_vm(params["main_vm"])
-    vm.verify_alive()
+    pinned_node = 0
+    host_numa = utils_misc.NumaInfo()
+    node_list = host_numa.online_nodes_withcpumem
+    try:
+        for node in node_list:
+            node_mem_free = int(host_numa.read_from_node_meminfo(node, "MemFree"))
+            mem = int(params["mem"])
+            mem_kb = mem * 1024
+            if node_mem_free > mem_kb:
+                pinned_node = node
+        params["qemu_command_prefix"] = f"numactl -m {pinned_node}"
+        vm_name = params["main_vm"]
+        env_process.preprocess_vm(test, params, env, vm_name)
+        vm = env.get_vm(vm_name)
+        vm.verify_alive()
+    except virt_vm.VMCreateError:
+        test.error("Not enough memory on the nodes to create the VM")
+
     login_timeout = int(params.get("login_timeout", 360))
 
     config_cmds = params.get("config_cmds")