system-dpdk: Skip all tests if there are no hugepages

A failure is quite harsh in this scenario.  It's better to
simply skip all the tests and let the user look at the logs
to understand the missing hugepages.

Signed-off-by: Bala Sankaran <bsankara@redhat.com>
Co-authored-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>

Documentation/topics/testing.rst

@@ -322,6 +322,12 @@ the NIC to the DPDK-compatible driver.
 
 .. _DPDK supported NIC: http://dpdk.org/doc/nics
 
+All tests are skipped if no hugepages are configured. User must look into the DPDK
+manual to figure out how to `Configure hugepages`_.
+The phy test will skip if no compatible physical device is available.
+
+.. _Configure hugepages: http://doc.dpdk.org/guides/linux_gsg/sys_reqs.html
+
 Kernel datapath
 '''''''''''''''
 

tests/system-dpdk-macros.at

@@ -6,7 +6,7 @@
 m4_define([OVS_DPDK_PRE_CHECK],
   [dnl Check Hugepages
    AT_CHECK([cat /proc/meminfo], [], [stdout])
-   AT_CHECK([grep HugePages_ stdout], [], [stdout])
+   AT_SKIP_IF([egrep 'HugePages_Free: *0' stdout], [], [stdout])
    AT_CHECK([mount], [], [stdout])
    AT_CHECK([grep 'hugetlbfs' stdout], [], [stdout], [])
 

tests/system-dpdk.at

@@ -47,7 +47,7 @@ dnl --------------------------------------------------------------------------
 dnl Add vhost-user-client port
 AT_SETUP([OVS-DPDK datapath - add vhost-user-client port])
 AT_KEYWORDS([dpdk])
-
+OVS_DPDK_PRE_CHECK()
 OVS_DPDK_START()
 
 dnl Add userspace bridge and attach it to OVS