[ovs-dev] SIGILL ovs branch-2.12/arm64/DPDK

Yanqin Wei (Arm Technology China) Yanqin.Wei at arm.com
Thu Sep 5 09:30:30 UTC 2019


Hi Ilya,
Thanks for the clarification. It looks application is strong couple with DPDK. I will follow your discussion under this bug.

Best Regards,
Wei Yanqin

-----Original Message-----
From: Ilya Maximets <i.maximets at samsung.com>
Sent: Thursday, September 5, 2019 3:41 PM
To: Yanqin Wei (Arm Technology China) <Yanqin.Wei at arm.com>; James Page <james.page at canonical.com>
Cc: ovs-dev at openvswitch.org
Subject: Re: [ovs-dev] SIGILL ovs branch-2.12/arm64/DPDK

On 05.09.2019 10:34, Yanqin Wei (Arm Technology China) wrote:
> Is it possible a configuration issue for building OVS userspace program , which should not enable crc for xgene cpu?

There is a arm64-xgene1-linux-gcc target that can be used for a legacy make-based build system. New meson based build doesn't support that.

> DPDK library is linked with OVS program during OVS building. It should not import compiling configuration from DPDK, right?

DPDK exports its machine flags, extra defines and libraries to the application build process because big and important parts of DPDK code are in header inlines and built within the application build process.

>
> Best Regards,
> Wei Yanqin
>
> -----Original Message-----
> From: Ilya Maximets <i.maximets at samsung.com>
> Sent: Wednesday, September 4, 2019 8:46 PM
> To: Yanqin Wei (Arm Technology China) <Yanqin.Wei at arm.com>; James Page
> <james.page at canonical.com>
> Cc: ovs-dev at openvswitch.org
> Subject: Re: [ovs-dev] SIGILL ovs branch-2.12/arm64/DPDK
>
> BTW, I submitted a bug to DPDK:
> https://bugs.dpdk.org/show_bug.cgi?id=344
>
> Best regards, Ilya Maximets.
>
> On 04.09.2019 12:53, Yanqin Wei (Arm Technology China) wrote:
>> Understood. Thanks for the information.
>>
>>
>>
>> Best Regards,
>>
>> Wei Yanqin
>>
>>
>>
>> *From:* James Page <james.page at canonical.com>
>> *Sent:* Wednesday, September 4, 2019 5:45 PM
>> *To:* Yanqin Wei (Arm Technology China) <Yanqin.Wei at arm.com>
>> *Cc:* Ilya Maximets <i.maximets at samsung.com>; ovs-dev at openvswitch.org
>> *Subject:* Re: [ovs-dev] SIGILL ovs branch-2.12/arm64/DPDK
>>
>>
>>
>> Hi
>>
>>
>>
>> On Wed, Sep 4, 2019 at 10:30 AM Yanqin Wei (Arm Technology China) <Yanqin.Wei at arm.com <mailto:Yanqin.Wei at arm.com>> wrote:
>>
>>
>>     CRC32 is not a mandatory feature for Armv8.0. What is the arm64 CPU used in your platform?
>>     I'm not sure if it's necessary to use mandatory feature (neon) to optimize hash libraries, because I thought most arm64 CPUs supported CRC32.
>>
>>
>>
>> The builders we use in Launchpad for package builds are fully virtualized via OpenStack; I checked and we have some older X-gene CPU's which don't have crc32 support.
>>
>>
>>
>> IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
> IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
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IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.


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