[dts] [PATCH V1] try to fix sometime dut port rx packets error

[Liu, Yong]

Huilong,

Packet transmission should be reliable in DTS, otherwise all cases can't trust with the result.
If send packet by scapy console is not so reliable, please try with packet module. We plan to replace scapy command with packet module later.

Marvin

> -----Original Message-----
> From: dts [mailto:dts-bounces at dpdk.org] On Behalf Of xu,huilong
> Sent: Wednesday, December 07, 2016 3:12 PM
> To: dts at dpdk.org
> Cc: Xu, HuilongX
> Subject: [dts] [PATCH V1] try to fix sometime dut port rx packets error
> 
> some time dut rx packet error, we guess the root case about scapy send
> packets.
> so we try send packets again when check dut not rx packets.
> 
> Signed-off-by: xu,huilong <huilongx.xu at intel.com>
> ---
>  tests/TestSuite_pmd.py | 30 +++++++++++++++++-------------
>  1 file changed, 17 insertions(+), 13 deletions(-)
> 
> diff --git a/tests/TestSuite_pmd.py b/tests/TestSuite_pmd.py
> index 7b9e6b5..e8a65e5 100644
> --- a/tests/TestSuite_pmd.py
> +++ b/tests/TestSuite_pmd.py
> @@ -342,19 +342,23 @@ class TestPmd(TestCase,IxiaPacketGenerator):
>          checksum = ''
>          if checksum_test:
>              checksum = 'chksum=0x1'
> -
> -        self.tester.scapy_foreground()
> -        self.tester.scapy_append('nutmac="%s"' % mac)
> -        self.tester.scapy_append('sendp([Ether(dst=nutmac,
> src="52:00:00:00:00:00")/IP(len=%s)/UDP(%s)/Raw(load="\x50"*%s)],
> iface="%s")' % (
> -            load_size, checksum, padding, interface))
> -
> -        out = self.tester.scapy_execute()
> -        time.sleep(.5)
> -
> -        port0_stats = self.get_stats(self.dut_ports[0])
> -        p0tx_pkts, p0tx_bytes = [port0_stats['TX-packets'],
> port0_stats['TX-bytes']]
> -        port1_stats = self.get_stats(self.dut_ports[1])
> -        p1rx_pkts, p1rx_err, p1rx_bytes = [port1_stats['RX-packets'],
> port1_stats['RX-errors'], port1_stats['RX-bytes']]
> +        for i in range(3):
> +            self.tester.scapy_foreground()
> +            self.tester.scapy_append('nutmac="%s"' % mac)
> +            self.tester.scapy_append('sendp([Ether(dst=nutmac,
> src="52:00:00:00:00:00")/IP(len=%s)/UDP(%s)/Raw(load="\x50"*%s)],
> iface="%s")' % (
> +                load_size, checksum, padding, interface))
> +
> +            out = self.tester.scapy_execute()
> +            time.sleep((i + 1) * 0.5)
> +
> +            port0_stats = self.get_stats(self.dut_ports[0])
> +            p0tx_pkts, p0tx_bytes = [port0_stats['TX-packets'],
> port0_stats['TX-bytes']]
> +            port1_stats = self.get_stats(self.dut_ports[1])
> +            p1rx_pkts, p1rx_err, p1rx_bytes = [port1_stats['RX-packets'],
> port1_stats['RX-errors'], port1_stats['RX-bytes']]
> +            #dut port rx packets already
> +            if (p1rx_pkts - gp1rx_pkts):
> +                break
> +            time.sleep(i)
> 
>          p0tx_pkts -= gp0tx_pkts
>          p0tx_bytes -= gp0tx_bytes
> --
> 1.9.3