[PATCH] recipes: short_lived_connections: add coalescing tunable

[Jan Tluka]

The test now takes alias adaptive_coalescing_off. If set to yes, the adaptive
coalescing will be turned off on the test devices while performing the tests.

Signed-off-by: Jan Tluka <jtluka(a)redhat.com&gt;
---
 .../phase3/short_lived_connections.py               | 21 +++++++++++++++++++++
 .../phase3/short_lived_connections.xml              |  1 +
 2 files changed, 22 insertions(+)

diff --git a/recipes/regression_tests/phase3/short_lived_connections.py
b/recipes/regression_tests/phase3/short_lived_connections.py
index 6ed38c6..68ecfca 100644
--- a/recipes/regression_tests/phase3/short_lived_connections.py
+++ b/recipes/regression_tests/phase3/short_lived_connections.py
@@ -1,3 +1,4 @@
+from lnst.Common.Utils import bool_it
 from lnst.Controller.Task import ctl
 from lnst.Controller.PerfRepoUtils import netperf_baseline_template
 from lnst.Controller.PerfRepoUtils import netperf_result_template
@@ -37,6 +38,7 @@ nperf_num_parallel = int(ctl.get_alias("nperf_num_parallel"))
 nperf_debug = ctl.get_alias("nperf_debug")
 nperf_max_dev = ctl.get_alias("nperf_max_dev")
 pr_user_comment = ctl.get_alias("perfrepo_comment")
+adaptive_coalescing_off = bool_it(ctl.get_alias("adaptive_coalescing_off"))
 
 m1_testiface = m1.get_interface("testiface")
 m2_testiface = m2.get_interface("testiface")
@@ -46,6 +48,20 @@ m2_testiface.set_mtu(mtu)
 
 pr_comment = generate_perfrepo_comment([m1, m2], pr_user_comment)
 
+if adaptive_coalescing_off:
+    coalesce_status = ctl.get_module('Custom')
+
+    for d in [ m1_testiface, m2_testiface ]:
+        # disable any interrupt coalescing settings
+        cdata = d.save_coalesce()
+        cdata['use_adaptive_tx_coalesce'] = 0
+        cdata['use_adaptive_rx_coalesce'] = 0
+        if not d.set_coalesce(cdata):
+            coalesce_status.set_options({'fail': True,
+                                         'msg': "Failed to set coalesce
options"\
+                                                " on device %s" %
d.get_devname()})
+            d.get_host().run(coalesce_status)
+
 if netdev_cpupin:
     m1.run("service irqbalance stop")
     m2.run("service irqbalance stop")
@@ -166,3 +182,8 @@ for size in ["1K,1K", "5K,5K", "7K,7K",
"10K,10K", "12K,12K"]:
 if netdev_cpupin:
     m1.run("service irqbalance start")
     m2.run("service irqbalance start")
+
+if adaptive_coalescing_off:
+    for d in [ m1_testiface, m2_testiface ]:
+        # restore any interrupt coalescing settings
+        d.restore_coalesce()
diff --git a/recipes/regression_tests/phase3/short_lived_connections.xml
b/recipes/regression_tests/phase3/short_lived_connections.xml
index 289205e..e879a6f 100644
--- a/recipes/regression_tests/phase3/short_lived_connections.xml
+++ b/recipes/regression_tests/phase3/short_lived_connections.xml
@@ -12,6 +12,7 @@
         <alias name="mapping_file"
value="short_lived_connections.mapping" />
         <alias name="net" value="192.168.101" />
         <alias name="driver" value="ixgbe" />
+        <alias name="adaptive_coalescing_off" value="no"/>
     </define>
     <network>
         <host id="machine1">
-- 
2.14.4