[dts] [PATCH V2] tests/sriov_kvm: fix can't receive packets failure

[dts] [PATCH V2] tests/sriov_kvm: fix can't receive packets failure

[Fangfang Wei]

Fix DPDK-3276: reopen set port 0 vf rxmode BAM on failed

When reopen set port 0 vf rxmode BAM on, vm can't receive packets, because
RX buffer is full on host when host receives too many packets if host only
run testpmd without "start" command.

RX buffer will be cleaned just when start forward packets.
If we not run "start", rx buffer will be full, and can't receive new packets.
In this case, we don't want pf forwarding packets, so we set fwd rxonly, and
start forwarding on host.

Signed-off-by: Fangfang Wei <fangfangx.wei@intel.com>
---
 tests/TestSuite_sriov_kvm.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/TestSuite_sriov_kvm.py b/tests/TestSuite_sriov_kvm.py
index b1c3db6..8424b22 100644
--- a/tests/TestSuite_sriov_kvm.py
+++ b/tests/TestSuite_sriov_kvm.py
@@ -351,6 +351,8 @@ class TestSriovKvm(TestCase):
                                                        'vf1': self.sriov_vfs_port[1].pci}
                 self.host_testpmd.start_testpmd(
                     "1S/2C/2T", "--rxq=4 --txq=4 --txqflags=0", eal_param=eal_param)
+                self.host_testpmd.execute_cmd('set fwd rxonly')
+                self.host_testpmd.execute_cmd('start')
 
             # set up VM0 ENV
             self.vm0 = QEMUKvm(self.dut, 'vm0', 'sriov_kvm')
-- 
2.7.4

Re: [dts] [PATCH V2] tests/sriov_kvm: fix can't receive packets failure

[Liu, Yong]

Thanks, fangfang. Applied in with some modification in commit log.
Word "host" was replaced with "PF device" to make commit log more clear.

On 08/28/2017 12:08 PM, Fangfang Wei wrote:
> Fix DPDK-3276: reopen set port 0 vf rxmode BAM on failed
>
> When reopen set port 0 vf rxmode BAM on, vm can't receive packets, because
> RX buffer is full on host when host receives too many packets if host only
> run testpmd without "start" command.
>
> RX buffer will be cleaned just when start forward packets.
> If we not run "start", rx buffer will be full, and can't receive new packets.
> In this case, we don't want pf forwarding packets, so we set fwd rxonly, and
> start forwarding on host.
>
> Signed-off-by: Fangfang Wei<fangfangx.wei@intel.com>