:i.maxim...@samsung.com>>; Lee Reed
mailto:lee.r...@broadcom.com>>; Vinay Gupta
mailto:vinay.gu...@broadcom.com>>; Alex Barba
mailto:alex.ba...@broadcom.com>>
Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP (iperf3)
Thanks Yangin,
What does this
, 2020 12:23 PM
To: Yanqin Wei
Cc: Flavio Leitner ; ovs-dev@openvswitch.org; nd
; Ilya Maximets ; Lee Reed
; Vinay Gupta ; Alex Barba
Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP (iperf3)
Thanks Yangin,
What does this define mean? Every 10 second some kind of book
gt; *Cc:* Flavio Leitner ; ovs-dev@openvswitch.org; nd <
> n...@arm.com>; Ilya Maximets ; Lee Reed <
> lee.r...@broadcom.com>; Vinay Gupta ; Alex
> Barba
> *Subject:* Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP
> (iperf3)
>
>
>
> Hi Yanqin,
&
eed
mailto:lee.r...@broadcom.com>>; Vinay Gupta
mailto:vinay.gu...@broadcom.com>>; Alex Barba
mailto:alex.ba...@broadcom.com>>
Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP (iperf3)
Thanks Yanqin,
I am not seeing any context switches beyond 40usec in ou
020 9:27 PM
> *To:* Yanqin Wei
> *Cc:* Flavio Leitner ; ovs-dev@openvswitch.org; nd <
> n...@arm.com>; Ilya Maximets ; Lee Reed <
> lee.r...@broadcom.com>; Vinay Gupta ; Alex
> Barba
> *Subject:* Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP
> (ip
o:i.maxim...@samsung.com>>; Lee Reed
mailto:lee.r...@broadcom.com>>; Vinay Gupta
mailto:vinay.gu...@broadcom.com>>; Alex Barba
mailto:alex.ba...@broadcom.com>>
Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP (iperf3)
Hi Yanqin,
I added the patch you gav
t; Sent: Thursday, July 2, 2020 6:11 AM
> To: Yanqin Wei
> Cc: Flavio Leitner ; ovs-dev@openvswitch.org; nd <
> n...@arm.com>; Ilya Maximets ; Lee Reed <
> lee.r...@broadcom.com>; Vinay Gupta ; Alex
> Barba
> Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50)
:11 AM
To: Yanqin Wei
Cc: Flavio Leitner ; ovs-dev@openvswitch.org; nd
; Ilya Maximets ; Lee Reed
; Vinay Gupta ; Alex Barba
Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP (iperf3)
Hi Yanqin,
I added the patch you gave me to my script which runs a do nothing for loop
m: dev On Behalf Of Shahaji Bhosle
> via dev
> Sent: Wednesday, July 1, 2020 6:05 AM
> To: Flavio Leitner
> Cc: ovs-dev@openvswitch.org; Ilya Maximets ;
> Lee Reed ; Vinay Gupta
> ; Alex Barba
> Subject: Re: [ovs-dev] 10-25 packet drops every few (10-50) seconds TCP
> (ip
Hi Flavio,
I still see intermittent drops with rcu_nocbs. So I wrote that do_nothing()
loop..to avoid all the other distractions to see if Linux is messing with
the OVS loop just to see what is going on. The interesting thing I see the
case *BOLD* below where I use an ISB() instruction my STD
Hi Shahaji,
Did it help with the rcu_nocbs?
fbl
On Tue, Jun 30, 2020 at 12:56:27PM -0400, Shahaji Bhosle wrote:
> Thanks Flavio,
> Are there any special requirements for RCU on ARM vs x86.
>
> I am following what the above document is saying...Do you think I need to
> do something more
Thanks Flavio,
Are there any special requirements for RCU on ARM vs x86.
I am following what the above document is saying...Do you think I need to
do something more than the below?
Thanks again and appreciate the help. Shahaji
1. Isolate the CPU cores
*isolcpus=1,2,3,4,5,6,7 nohz_full=1-7
Right, you might want to review Documentation/timers/no_hz.rst from
the kernel sources and look for RCU implications section where
it explains how to move RCU callbacks.
fbl
On Tue, Jun 30, 2020 at 12:08:05PM -0400, Shahaji Bhosle wrote:
> Hi Flavio,
> I wrote a small program which has
Hi Flavio,
I wrote a small program which has do_nothing for loop and I measure the
timestamps across the do nothing loop. I am seeing 3% of the time around
the 1 second mark when the arch_timer fires I get the timestamps to be off
by 25% of the exprected value. I ran trace-cmd to see what is going
On Tue, Jun 02, 2020 at 12:56:51PM -0700, Vinay Gupta wrote:
> Hi Flavio,
>
> Thanks for your reply.
> I have captured the suggested information but do not see anything that
> could cause the packet drops.
> Can you please take a look at the below data and see if you can find
> something unusual
Hi Flavio,
Thanks for your reply.
I have captured the suggested information but do not see anything that
could cause the packet drops.
Can you please take a look at the below data and see if you can find
something unusual ?
The PMDs are running on CPU 1,2,3,4 and CPU 1-7 are isolated cores.
On Mon, Jun 01, 2020 at 07:27:09PM -0400, Shahaji Bhosle via dev wrote:
> Hi Ben/Ilya,
> Hope you guys are doing well and staying safe. I have been chasing a weird
> problem with small drops and I think that is causing lots of TCP
> retransmission.
>
> Setup details
> iPerf3(1k-5K
>
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