[dts] [PATCH v1] tests/vf_packet_rxtx: fix test case failures in vf_reset

[Herbert Guan]

Marvin,

When the execution config file selects driver mode to a certain mode (vfio, igb_uio, etc.), then both host and VM NICs will use this mode in case setup.  If some case need VM to use the igb_uio mode, regardless of the driver mode in execution configure file, we need to ensure the required drivers have been installed.  

If we want to restore the environment, we need to add some extra logic to the case script.  If the uio or igb_uio driver is not installed, then install it and make flag.  This script need to remove installed drivers that were not installed before running the test.

Best regards,
Herbert

> -----Original Message-----
> From: Liu, Yong [mailto:yong.liu at intel.com]
> Sent: Friday, March 2, 2018 10:08
> To: Herbert Guan <Herbert.Guan at arm.com>; dts at dpdk.org
> Subject: RE: [dts] [PATCH v1] tests/vf_packet_rxtx: fix test case failures in
> vf_reset
> 
> Hi Herbert,
> Why required driver is not insmod be previous setup?
> As one principle, we want to limit the influence of environment change in the
> suite.
> 
> Thanks,
> Marvin
> 
> > -----Original Message-----
> > From: dts [mailto:dts-bounces at dpdk.org] On Behalf Of Herbert Guan
> > Sent: Wednesday, February 14, 2018 2:29 PM
> > To: dts at dpdk.org
> > Cc: Herbert Guan <herbert.guan at arm.com>
> > Subject: [dts] [PATCH v1] tests/vf_packet_rxtx: fix test case failures
> > in vf_reset
> >
> > 1) Clear port stats before send/recv test packets
> > 2) Ensure igb_uio driver is installed if driver='igb_uio'
> >
> >
> > Signed-off-by: Herbert Guan <herbert.guan at arm.com>
> > ---
> >  tests/TestSuite_vf_packet_rxtx.py | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/tests/TestSuite_vf_packet_rxtx.py
> > b/tests/TestSuite_vf_packet_rxtx.py
> > index 63f4820..f0b7721 100644
> > --- a/tests/TestSuite_vf_packet_rxtx.py
> > +++ b/tests/TestSuite_vf_packet_rxtx.py
> > @@ -125,6 +125,9 @@ class TestVfPacketRxtx(TestCase):
> >      def packet_rx_tx(self, driver='default'):
> >
> >          if driver == 'igb_uio':
> > +            # ensure igb_uio driver is installed
> > +            self.dut.send_expect('(lsmod | grep uio) || (modprobe
> > + uio)',
> > '#')
> > +            self.dut.send_expect('(lsmod | grep igb_uio) ||
> > (insmod ./%s/kmod/igb_uio.ko)' % self.target,'#')
> >              self.setup_2pf_2vf_1vm_env(driver='igb_uio')
> >          else:
> >              self.setup_2pf_2vf_1vm_env(driver='')
> > @@ -279,6 +282,7 @@ class TestVfPacketRxtx(TestCase):
> >          rx_port = tx_port
> >
> >          dst_mac = pmd0_vf0_mac
> > +        self.vm0_testpmd.execute_cmd('clear port stats all')
> >          self.tester.sendpkt_bg(tx_port, dst_mac)
> >
> >          #vf port stop/start can trigger reset action
> > --
> > 1.8.3.1