linux-kernel - RE: [PATCH net-next 3/3] selftests: lan743x: Add testcase to check throughput of lan743x

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Message-ID:
 <DM6PR11MB42363573F3189C914E600A52839E2@DM6PR11MB4236.namprd11.prod.outlook.com>
Date: Fri, 6 Sep 2024 06:56:15 +0000
From: <Mohan.Prasad@...rochip.com>
To: <bcreeley@....com>, <netdev@...r.kernel.org>, <davem@...emloft.net>,
	<kuba@...nel.org>
CC: <shuah@...nel.org>, <Bryan.Whitehead@...rochip.com>,
	<UNGLinuxDriver@...rochip.com>, <edumazet@...gle.com>, <pabeni@...hat.com>,
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<horms@...nel.org>, <brett.creeley@....com>, <rosenp@...il.com>
Subject: RE: [PATCH net-next 3/3] selftests: lan743x: Add testcase to check
 throughput of lan743x

Hi Brett,

Thank you for the review comments.

> EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> content is safe
> 
> On 9/3/2024 3:15 PM, Mohan Prasad J wrote:
> > Caution: This message originated from an External Source. Use proper
> caution when opening attachments, clicking links, or responding.
> >
> >
> > Add testcase to check TCP throughput of lan743x network driver.
> > Test uses iperf3 to do performance testing of the driver.
> > TCP data at different speeds is sent, received and verified.
> >
> > Signed-off-by: Mohan Prasad J <mohan.prasad@...rochip.com>
> > ---
> >   .../net/hw/microchip/lan743x/lan743x.py       | 33 +++++++++++++++++++
> >   1 file changed, 33 insertions(+)
> >
> > diff --git
> > a/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > b/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > index 59f0be2a7..a3dcf7896 100755
> > ---
> > a/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > +++ b/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x
> > +++ .py
> > @@ -3,6 +3,7 @@
> >
> >   import time
> >   import re
> > +import json
> >   from lib.py import ksft_run, ksft_exit, ksft_pr, ksft_eq
> >   from lib.py import KsftFailEx, KsftSkipEx
> >   from lib.py import NetDrvEpEnv
> > @@ -75,6 +76,38 @@ def test_network_speed(cfg) -> None:
> >               time.sleep(5)
> >               verify_speed_and_duplex(cfg.ifname, speed, duplex)
> >
> > +def test_tcp_throughput(cfg) -> None:
> > +    speeds = ["10", "100", "1000"]
> > +    """Test duration in seconds"""
> > +    test_duration = 5
> > +    target_ip = cfg.remote_addr
> > +
> > +    for speed in speeds:
> > +        set_speed_and_duplex(cfg.ifname, speed, 'full')
> > +        time.sleep(5)
> > +        verify_link_up(cfg.ifname)
> > +        send_command=f"iperf3 -c {target_ip} -t {test_duration} --json"
> > +        receive_command=f"iperf3 -c {target_ip} -t {test_duration} --reverse --
> json"
> > +        send_result = cmd(send_command)
> > +        receive_result = cmd(receive_command)
> > +        if send_result.ret != 0 or receive_result.ret != 0:
> > +            raise KsftSkipEx("No server is running")
> > +
> > +        send_output = send_result.stdout
> > +        receive_output = receive_result.stdout
> > +
> > +        send_data = json.loads(send_output)
> > +        receive_data = json.loads(receive_output)
> > +        """Convert throughput to Mbps"""
> > +        send_throughput =
> round(send_data['end']['sum_sent']['bits_per_second'] / 1e6, 2)
> > +        receive_throughput =
> > + round(receive_data['end']['sum_received']['bits_per_second'] / 1e6,
> > + 2)
> > +
> > +        ksft_pr(f"Send throughput: {send_throughput} Mbps, Receive
> throughput: {receive_throughput} Mbps")
> > +        """Check whether throughput is not below 0.9 times the set speed"""
> > +        threshold = float(speed) * 0.9
> > +        if send_throughput < threshold or receive_throughput < threshold:
> > +            raise KsftFailEx("Throughput is below threshold")
> 
> IMO it would be best to do these checks separately so the failure is
> immediately obvious.

I will separate these checks in the next version.

> 
> Thanks,
> 
> Brett
> > +
> >   def main() -> None:
> >       with NetDrvEpEnv(__file__) as cfg:
> >           ksft_run(globs=globals(), case_pfx={"test_"}, args=(cfg,))
> > --
> > 2.43.0
> >