[dpdk-dev] [PATCH v4 0/2] one way barrier for split vring idx

Maxime Coquelin maxime.coquelin at redhat.com
Thu Apr 30 11:09:06 CEST 2020



On 4/29/20 7:45 PM, Ferruh Yigit wrote:
> On 4/24/2020 4:39 AM, Joyce Kong wrote:
>> This patchset replaces the two-way barriers with C11 one-way barriers
>> for split vring idx, when the frontend and backend are implemented
>> in software.
>>
>> By doing PVP benchmarking, the test result of 2c1q showed the throughput
>> increased 20% with the 0.001% of acceptable loss rate on Thunderx2
>> platform.[1]
>>
>> By doing vhost-user + virtio-user case benchmarking, 4% performance gain
>> was measured on Thunderx2 platform by 2c1q RFC2544 test of 0.001% loss,
>> and 4.7% performance was improved on Dell platform by 1c1q RFC2544 test
>> of zero packet loss.[2]
>>
>> [1]https://doc.dpdk.org/guides/howto/pvp_reference_benchmark.html
>> [2]https://doc.dpdk.org/dts/test_plans/pvp_multi_paths_performance_test_plan.html
>>    PVP test with virtio 1.0 normal path
>>
>> v4:
>>   Remove some duplicated code comment.
>>
>> v3:
>>   Modify some style error.
>>
>> v2:
>>   Add test performance statistics.
>>
>> Joyce Kong (2):
>>   virtio: one way barrier for split vring used idx
>>   virtio: one way barrier for split vring avail idx
>>
> 
> Hi Joyce,
> 
> When 'CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_DUMP=y' enabled, build fails. Can you
> please check it?

Hi Joyce,

I will need the fix today, just send a v5 for the series.
If not possible to do it today, please let me know.

Maxime


> Thanks,
> ferruh
> 



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