[ovs-discuss] Re：[HELP] Question about Performance issues in high concurrency scenarios

2019-03-07 Thread txfh2007 via discuss 
Hi all:
Nearly one week passed and onbody replies on my question below, really hope 
someone will help me answer this question.

 I have test ovs-dpdk PVP performance for several days . And I have found 
in high concurrency scenarios(eg. 100K mac-ip streams), the ovs-dpdk 
performance gets significant decline. And one cause of performance decline is 
the emc entry num limitation, is that right? If I just increase emc entry num,  
will other problems occur ? Are there any suggession helping to get performance 
improvement under high concurrency scenarios?


Thanks

Timo 





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[ovs-discuss] Re： [HELP] Question about Performance issues in high concurrency scenarios

2019-03-13 Thread txfh2007 via discuss 
Thanks，Flavio:
So there are two questions: 
1. Is dpcls lookup More efficiency than EMC?
2. If I just want to enlarge emc entry num by change EM_FLOW_HASH_SHIFT 
value, are there any drawbacks ?



--
发件人：Flavio Leitner 
发送时间：2019年3月14日(星期四) 04:05
收件人：txfh2007 
抄　送：ovs-discuss 
主　题：Re: [ovs-discuss] [HELP] Question about Performance issues in high 
concurrency scenarios

On Tue, Mar 05, 2019 at 03:38:43PM +0800, txfh2007 via discuss wrote:
> Hi everyone:
>  I have test ovs-dpdk PVP performance for several days . And I
>  have found in high concurrency scenarios(eg. 100K mac-ip
>  streams), the ovs-dpdk performance gets significant decline.
>  And one cause of performance decline is the emc entry num
>  limitation, is that right? If I just increase emc entry num,
>  will other problems occur ? Are there any suggession helping to
>  get performance improvement under high concurrency scenarios?


Perhaps you could consider disabling EMC if its size is not enough.
fbl

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[ovs-discuss] Re： [HELP] Question about Performance issues in high concurrency scenarios

2019-03-15 Thread txfh2007 via discuss 
Hi Yanqin && all:
I have studied this ppt && vedio, and  tried in my own environment. The 
result is in 100K mac-ip PVP test scenario, when EM_FLOW_HASH_SHIFT == 17(emc 
entry num is 130K+), the performance can still maintain(a little decline than 
10K mac-ip scenario). My formal conclusion is wrong as I didn't notice that if 
I generate 100K mac-ip flows , then the mac-table-entry num in ovs bridge 
should be enlarge simultaneously(I use the auto learn flow entries)

   I also tested scenario that smc is enabled and emc disabled. My result is 
pure smc performance is slightly not good as emc.(100K mac-ip flows, pkt size 
is 64 bytes, 4pmd lcores , 10G nic , PVP test, smc can reach 3.7G throughput, 
latency is 56us. For emc throughput is 4G , latency 51us )

   My question is: should emc entry num get enlarged ? Are there any drawbacks 
if emc entry is larger than 100K ?







--
发件人：Yanqin Wei (Arm Technology China) 
发送时间：2019年3月14日(星期四) 10:05
收件人：txfh2007 ; Flavio Leitner 
抄　送：ovs-discuss 
主　题：RE: [ovs-discuss] Re： [HELP] Question about Performance issues in high 
concurrency scenarios


!--  @font-face{font-family:Cambria Math;panose-1:2 4 5 3 5 4 6 3 2 
4;}{font-family:DengXian;panose-1:2 1 6 0 3 1 1 1 1 
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span.MsoHyperlinkFollowed{mso-style-priority:99;color:#954f72;text-decoration:underline;}p.msonormal0,
 li.msonormal0, 
div.msonormal0{mso-style-name:msonormal;mso-margin-top-alt:auto;margin-right:.0in;mso-margin-bottom-alt:auto;margin-left:.0in;font-size:11.0pt;font-family:Calibri,sans-serif;}span.EmailStyle19{mso-style-type:personal-reply;font-family:Calibri,sans-serif;color:windowtext;}.MsoChpDefault{mso-style-type:export-only;font-family:Calibri,sans-serif;}@page
 WordSection1{size:8.5in 11.0in;margin:1.0in 1.0in 1.0in 
1.0in;}div.WordSection1{page:WordSection1;}-->Hi,
 
There is a interesting topic in Open vSwitch 2018 Fall Conference maybe helpful 
for you. It shows EMC/SMC behave different performance in high concurrency case.
For your case, SMC may be more helpful.
 
http://www.openvswitch.org/support/ovscon2018/5/1330-theurer.pdf
 
 
 
From: ovs-discuss-boun...@openvswitch.org 
On Behalf Of txfh2007 via discuss
Sent: Thursday, March 14, 2019 9:00 AM
To: Flavio Leitner 
Cc: ovs-discuss 
Subject: [ovs-discuss] Re： [HELP] Question about Performance issues in high 
concurrency scenarios
 
Thanks，Flavio:

So there are two questions: 

1. Is dpcls lookup More efficiency than EMC?

2. If I just want to enlarge emc entry num by change EM_FLOW_HASH_SHIFT 
value, are there any drawbacks ?

 

 

--

发件人：Flavio Leitner 

发送时间：2019年3月14日(星期四) 04:05

收件人：txfh2007 

抄　送：ovs-discuss 

主　题：Re: [ovs-discuss] [HELP] Question about Performance issues in high 
concurrency scenarios

 

On Tue, Mar 05, 2019 at 03:38:43PM +0800, txfh2007 via discuss wrote:
> Hi everyone:
>  I have test ovs-dpdk PVP performance for several days . And I
>  have found in high concurrency scenarios(eg. 100K mac-ip
>  streams), the ovs-dpdk performance gets significant decline.
>  And one cause of performance decline is the emc entry num
>  limitation, is that right? If I just increase emc entry num,
>  will other problems occur ? Are there any suggession helping to
>  get performance improvement under high concurrency scenarios?
 

Perhaps you could consider disabling EMC if its size is not enough.
fbl
 



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Re: [ovs-discuss] Re： [HELP] Question about Performance issues in high concurrency scenarios

2019-03-13 Thread Yanqin Wei (Arm Technology China) 
Hi,

There is a interesting topic in Open vSwitch 2018 Fall Conference maybe helpful 
for you. It shows EMC/SMC behave different performance in high concurrency case.
For your case, SMC may be more helpful.

http://www.openvswitch.org/support/ovscon2018/5/1330-theurer.pdf



From: ovs-discuss-boun...@openvswitch.org  
On Behalf Of txfh2007 via discuss
Sent: Thursday, March 14, 2019 9:00 AM
To: Flavio Leitner 
Cc: ovs-discuss 
Subject: [ovs-discuss] Re： [HELP] Question about Performance issues in high 
concurrency scenarios

Thanks，Flavio:
So there are two questions:
1. Is dpcls lookup More efficiency than EMC?
2. If I just want to enlarge emc entry num by change EM_FLOW_HASH_SHIFT 
value, are there any drawbacks ?


--
发件人：Flavio Leitner mailto:f...@sysclose.org>>
发送时间：2019年3月14日(星期四) 04:05
收件人：txfh2007 mailto:txfh2...@aliyun.com>>
抄　送：ovs-discuss 
mailto:ovs-discuss@openvswitch.org>>
主　题：Re: [ovs-discuss] [HELP] Question about Performance issues in high 
concurrency scenarios

On Tue, Mar 05, 2019 at 03:38:43PM +0800, txfh2007 via discuss wrote:
> Hi everyone:
>  I have test ovs-dpdk PVP performance for several days . And I
>  have found in high concurrency scenarios(eg. 100K mac-ip
>  streams), the ovs-dpdk performance gets significant decline.
>  And one cause of performance decline is the emc entry num
>  limitation, is that right? If I just increase emc entry num,
>  will other problems occur ? Are there any suggession helping to
>  get performance improvement under high concurrency scenarios?


Perhaps you could consider disabling EMC if its size is not enough.
fbl

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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Re: [ovs-discuss] Re： [HELP] Question about Performance issues in high concurrency scenarios

2019-03-15 Thread Yanqin Wei (Arm Technology China) 
Hi
What I know is EMC need more memory space. EMC has 8k entries by default, this 
memory can store 1000K SMC entries.  EMC should perform better with the same 
cache entries, but SMC is better with the same memory space.

Best Regards,
Wei Yanqin

-Original Message-
From: txfh2007 
Sent: Friday, March 15, 2019 3:23 PM
To: Yanqin Wei (Arm Technology China) ; Flavio Leitner 

Cc: ovs-discuss 
Subject: Re： [HELP] Question about Performance issues in high concurrency 
scenarios

Hi Yanqin && all:
I have studied this ppt && vedio, and  tried in my own environment. The 
result is in 100K mac-ip PVP test scenario, when EM_FLOW_HASH_SHIFT == 17(emc 
entry num is 130K+), the performance can still maintain(a little decline than 
10K mac-ip scenario). My formal conclusion is wrong as I didn't notice that if 
I generate 100K mac-ip flows , then the mac-table-entry num in ovs bridge 
should be enlarge simultaneously(I use the auto learn flow entries)

   I also tested scenario that smc is enabled and emc disabled. My result is 
pure smc performance is slightly not good as emc.(100K mac-ip flows, pkt size 
is 64 bytes, 4pmd lcores , 10G nic , PVP test, smc can reach 3.7G throughput, 
latency is 56us. For emc throughput is 4G , latency 51us )

   My question is: should emc entry num get enlarged ? Are there any drawbacks 
if emc entry is larger than 100K ?







--
发件人：Yanqin Wei (Arm Technology China) 
发送时间：2019年3月14日(星期四) 10:05
收件人：txfh2007 ; Flavio Leitner 
抄　送：ovs-discuss 
主　题：RE: [ovs-discuss] Re： [HELP] Question about Performance issues in high 
concurrency scenarios


!--  @font-face{font-family:Cambria Math;panose-1:2 4 5 3 5 4 6 3 2 
4;}{font-family:DengXian;panose-1:2 1 6 0 3 1 1 1 1 
1;}{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 
4;}{font-family:\@DengXian;panose-1:2 1 6 0 3 1 1 1 1 
1;}{font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}{font-family:Microsoft 
YaHei;panose-1:2 11 5 3 2 2 4 2 2 4;}{font-family:\@Microsoft 
YaHei;}p.MsoNormal, li.MsoNormal, 
div.MsoNormal{margin:.0in;margin-bottom:.0pt;font-size:11.0pt;font-family:Calibri,sans-serif;}a:link,
 
span.MsoHyperlink{mso-style-priority:99;color:#0563c1;text-decoration:underline;}a:visited,
 
span.MsoHyperlinkFollowed{mso-style-priority:99;color:#954f72;text-decoration:underline;}p.msonormal0,
 li.msonormal0, 
div.msonormal0{mso-style-name:msonormal;mso-margin-top-alt:auto;margin-right:.0in;mso-margin-bottom-alt:auto;margin-left:.0in;font-size:11.0pt;font-family:Calibri,sans-serif;}span.EmailStyle19{mso-style-type:personal-reply;font-family:Calibri,sans-serif;color:windowtext;}.MsoChpDefault{mso-style-type:export-only;font-family:Calibri,sans-serif;}@page
 WordSection1{size:8.5in 11.0in;margin:1.0in 1.0in 1.0in 
1.0in;}div.WordSection1{page:WordSection1;}-->Hi,

There is a interesting topic in Open vSwitch 2018 Fall Conference maybe helpful 
for you. It shows EMC/SMC behave different performance in high concurrency case.
For your case, SMC may be more helpful.

http://www.openvswitch.org/support/ovscon2018/5/1330-theurer.pdf



From: ovs-discuss-boun...@openvswitch.org 
On Behalf Of txfh2007 via discuss
Sent: Thursday, March 14, 2019 9:00 AM
To: Flavio Leitner 
Cc: ovs-discuss 
Subject: [ovs-discuss] Re： [HELP] Question about Performance issues in high 
concurrency scenarios

Thanks，Flavio:

So there are two questions:

1. Is dpcls lookup More efficiency than EMC?

2. If I just want to enlarge emc entry num by change EM_FLOW_HASH_SHIFT 
value, are there any drawbacks ?





--

发件人：Flavio Leitner 

发送时间：2019年3月14日(星期四) 04:05

收件人：txfh2007 

抄　送：ovs-discuss 

主　题：Re: [ovs-discuss] [HELP] Question about Performance issues in high 
concurrency scenarios



On Tue, Mar 05, 2019 at 03:38:43PM +0800, txfh2007 via discuss wrote:
> Hi everyone:
>  I have test ovs-dpdk PVP performance for several days . And I
>  have found in high concurrency scenarios(eg. 100K mac-ip
>  streams), the ovs-dpdk performance gets significant decline.
>  And one cause of performance decline is the emc entry num
>  limitation, is that right? If I just increase emc entry num,
>  will other problems occur ? Are there any suggession helping to
>  get performance improvement under high concurrency scenarios?


Perhaps you could consider disabling EMC if its size is not enough.
fbl




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,