* [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000
@ 2019-01-22 15:07 Martin Weiser
2019-04-09 11:20 ` Martin Weiser
0 siblings, 1 reply; 5+ messages in thread
From: Martin Weiser @ 2019-01-22 15:07 UTC (permalink / raw)
To: Beilei Xing, Qi Zhang, dev
Hi,
We are using a Xeon D with an integrated X722 NIC that provides two
ports of 8086:37d2 and two ports of 8086:37d0. All four ports show the
same behavior: they return a link speed value of 20000 for a 10Gbps link.
This only seems to happen when internally the update_link_reg() function
in i40e_ethdev.c is used. This requires the application to use the
rte_eth_link_get_nowait() function and not use link status change
interrupts.
If you use e.g. testpmd with the option --no-lsc-interrupt you can
reproduce the behavior since it will suddenly show a link speed of 20000
Mbps instead of 10000 Mbps.
Here are two examples of the register values read by update_link_reg():
A 10Gbps link which produces the wrong link speed value:
I40E_PRTMAC_LINKSTA: 0x60000080
I40E_PRTMAC_MACC: 0x3d00
A 1Gbps link which produces the correct link speed value:
I40E_PRTMAC_LINKSTA: 0x48000081
I40E_PRTMAC_MACC: 0x3d00
Best regards,
Martin
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000
2019-01-22 15:07 [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000 Martin Weiser
@ 2019-04-09 11:20 ` Martin Weiser
2019-04-09 11:20 ` Martin Weiser
2019-04-10 5:22 ` Xing, Beilei
0 siblings, 2 replies; 5+ messages in thread
From: Martin Weiser @ 2019-04-09 11:20 UTC (permalink / raw)
To: Beilei Xing, Qi Zhang, dev
Hi,
just bumping this since there has been no reply at all for a long time.
Would it be better if I opened a bug for this?
Best,
Martin
Am 22.01.19 um 16:07 schrieb Martin Weiser:
> Hi,
>
> We are using a Xeon D with an integrated X722 NIC that provides two
> ports of 8086:37d2 and two ports of 8086:37d0. All four ports show the
> same behavior: they return a link speed value of 20000 for a 10Gbps link.
>
> This only seems to happen when internally the update_link_reg() function
> in i40e_ethdev.c is used. This requires the application to use the
> rte_eth_link_get_nowait() function and not use link status change
> interrupts.
> If you use e.g. testpmd with the option --no-lsc-interrupt you can
> reproduce the behavior since it will suddenly show a link speed of 20000
> Mbps instead of 10000 Mbps.
>
>
> Here are two examples of the register values read by update_link_reg():
>
> A 10Gbps link which produces the wrong link speed value:
>
> I40E_PRTMAC_LINKSTA: 0x60000080
> I40E_PRTMAC_MACC: 0x3d00
>
>
> A 1Gbps link which produces the correct link speed value:
>
> I40E_PRTMAC_LINKSTA: 0x48000081
> I40E_PRTMAC_MACC: 0x3d00
>
>
> Best regards,
> Martin
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000
2019-04-09 11:20 ` Martin Weiser
@ 2019-04-09 11:20 ` Martin Weiser
2019-04-10 5:22 ` Xing, Beilei
1 sibling, 0 replies; 5+ messages in thread
From: Martin Weiser @ 2019-04-09 11:20 UTC (permalink / raw)
To: Beilei Xing, Qi Zhang, dev
Hi,
just bumping this since there has been no reply at all for a long time.
Would it be better if I opened a bug for this?
Best,
Martin
Am 22.01.19 um 16:07 schrieb Martin Weiser:
> Hi,
>
> We are using a Xeon D with an integrated X722 NIC that provides two
> ports of 8086:37d2 and two ports of 8086:37d0. All four ports show the
> same behavior: they return a link speed value of 20000 for a 10Gbps link.
>
> This only seems to happen when internally the update_link_reg() function
> in i40e_ethdev.c is used. This requires the application to use the
> rte_eth_link_get_nowait() function and not use link status change
> interrupts.
> If you use e.g. testpmd with the option --no-lsc-interrupt you can
> reproduce the behavior since it will suddenly show a link speed of 20000
> Mbps instead of 10000 Mbps.
>
>
> Here are two examples of the register values read by update_link_reg():
>
> A 10Gbps link which produces the wrong link speed value:
>
> I40E_PRTMAC_LINKSTA: 0x60000080
> I40E_PRTMAC_MACC: 0x3d00
>
>
> A 1Gbps link which produces the correct link speed value:
>
> I40E_PRTMAC_LINKSTA: 0x48000081
> I40E_PRTMAC_MACC: 0x3d00
>
>
> Best regards,
> Martin
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000
2019-04-09 11:20 ` Martin Weiser
2019-04-09 11:20 ` Martin Weiser
@ 2019-04-10 5:22 ` Xing, Beilei
2019-04-10 5:22 ` Xing, Beilei
1 sibling, 1 reply; 5+ messages in thread
From: Xing, Beilei @ 2019-04-10 5:22 UTC (permalink / raw)
To: Martin Weiser, Zhang, Qi Z, dev
> -----Original Message-----
> From: Martin Weiser [mailto:martin.weiser@allegro-packets.com]
> Sent: Tuesday, April 9, 2019 7:21 PM
> To: Xing, Beilei <beilei.xing@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>;
> dev@dpdk.org
> Subject: Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns
> wrong link_speed value 20000 instead of 10000
>
> Hi,
>
> just bumping this since there has been no reply at all for a long time.
> Would it be better if I opened a bug for this?
Thanks for reporting.
Yes, you can open a bug on bugzilla, and we will check it if the bug exists.
>
> Best,
> Martin
>
>
> Am 22.01.19 um 16:07 schrieb Martin Weiser:
> > Hi,
> >
> > We are using a Xeon D with an integrated X722 NIC that provides two
> > ports of 8086:37d2 and two ports of 8086:37d0. All four ports show the
> > same behavior: they return a link speed value of 20000 for a 10Gbps link.
> >
> > This only seems to happen when internally the update_link_reg()
> > function in i40e_ethdev.c is used. This requires the application to
> > use the
> > rte_eth_link_get_nowait() function and not use link status change
> > interrupts.
> > If you use e.g. testpmd with the option --no-lsc-interrupt you can
> > reproduce the behavior since it will suddenly show a link speed of
> > 20000 Mbps instead of 10000 Mbps.
> >
> >
> > Here are two examples of the register values read by update_link_reg():
> >
> > A 10Gbps link which produces the wrong link speed value:
> >
> > I40E_PRTMAC_LINKSTA: 0x60000080
> > I40E_PRTMAC_MACC: 0x3d00
> >
> >
> > A 1Gbps link which produces the correct link speed value:
> >
> > I40E_PRTMAC_LINKSTA: 0x48000081
> > I40E_PRTMAC_MACC: 0x3d00
> >
> >
> > Best regards,
> > Martin
> >
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000
2019-04-10 5:22 ` Xing, Beilei
@ 2019-04-10 5:22 ` Xing, Beilei
0 siblings, 0 replies; 5+ messages in thread
From: Xing, Beilei @ 2019-04-10 5:22 UTC (permalink / raw)
To: Martin Weiser, Zhang, Qi Z, dev
> -----Original Message-----
> From: Martin Weiser [mailto:martin.weiser@allegro-packets.com]
> Sent: Tuesday, April 9, 2019 7:21 PM
> To: Xing, Beilei <beilei.xing@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>;
> dev@dpdk.org
> Subject: Re: [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns
> wrong link_speed value 20000 instead of 10000
>
> Hi,
>
> just bumping this since there has been no reply at all for a long time.
> Would it be better if I opened a bug for this?
Thanks for reporting.
Yes, you can open a bug on bugzilla, and we will check it if the bug exists.
>
> Best,
> Martin
>
>
> Am 22.01.19 um 16:07 schrieb Martin Weiser:
> > Hi,
> >
> > We are using a Xeon D with an integrated X722 NIC that provides two
> > ports of 8086:37d2 and two ports of 8086:37d0. All four ports show the
> > same behavior: they return a link speed value of 20000 for a 10Gbps link.
> >
> > This only seems to happen when internally the update_link_reg()
> > function in i40e_ethdev.c is used. This requires the application to
> > use the
> > rte_eth_link_get_nowait() function and not use link status change
> > interrupts.
> > If you use e.g. testpmd with the option --no-lsc-interrupt you can
> > reproduce the behavior since it will suddenly show a link speed of
> > 20000 Mbps instead of 10000 Mbps.
> >
> >
> > Here are two examples of the register values read by update_link_reg():
> >
> > A 10Gbps link which produces the wrong link speed value:
> >
> > I40E_PRTMAC_LINKSTA: 0x60000080
> > I40E_PRTMAC_MACC: 0x3d00
> >
> >
> > A 1Gbps link which produces the correct link speed value:
> >
> > I40E_PRTMAC_LINKSTA: 0x48000081
> > I40E_PRTMAC_MACC: 0x3d00
> >
> >
> > Best regards,
> > Martin
> >
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
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2019-01-22 15:07 [dpdk-dev] i40e rte_eth_link_get_nowait() on X722 returns wrong link_speed value 20000 instead of 10000 Martin Weiser
2019-04-09 11:20 ` Martin Weiser
2019-04-09 11:20 ` Martin Weiser
2019-04-10 5:22 ` Xing, Beilei
2019-04-10 5:22 ` Xing, Beilei
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