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From: "Iremonger, Bernard" <bernard.iremonger@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
CC: "dev@dpdk.org" <dev@dpdk.org>, "Lu, Wenzhuo" <wenzhuo.lu@intel.com>
Thread-Topic: [dpdk-dev] [PATCH v2] ixgbe: fix occasional timeouts when
 starting VF
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Date: Wed, 6 Apr 2016 10:37:11 +0000
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Subject: Re: [dpdk-dev] [PATCH v2] ixgbe: fix occasional timeouts when
 starting VF
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Hi Thomas,

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> Sent: Tuesday, April 5, 2016 4:48 PM
> To: Iremonger, Bernard <bernard.iremonger@intel.com>
> Cc: dev@dpdk.org; Lu, Wenzhuo <wenzhuo.lu@intel.com>
> Subject: Re: [dpdk-dev] [PATCH v2] ixgbe: fix occasional timeouts when
> starting VF
>=20
> 2016-04-05 15:55, Bernard Iremonger:
> > -		poll_ms =3D 10;
> > +		poll_ms =3D RTE_IXGBE_REGISTER_POLL_WAIT_15_MS;
> [...]
> >  #define RTE_IXGBE_REGISTER_POLL_WAIT_10_MS  10
> > +#define RTE_IXGBE_REGISTER_POLL_WAIT_15_MS  15
> >  #define RTE_IXGBE_WAIT_100_US               100
>=20
> I don't understand why these constants are needed.
> There is no semantic, just an arbitrary number.

I am seeing intermittent failures in the following test at line 4969 in ixg=
be_rxtx.c:

while (--poll_ms && !(txdctl & IXGBE_TXDCTL_ENABLE))

Increasing the value of poll_ms does not address the root cause of this fai=
lure.
This needs more investigation.

Self NAK.


 =20