how to set tcp_delack_min

b315558547 · Post by **b315558547** » 2016/08/30 08:26:19

My project is suffering 40ms tcp latency. I monitored the network status, I found that tcp ack delay 40ms, this is the problem. Some article say that redhat has a parameter tcp_delack_min, set it to 1 could resolve the problem. but in cent6.5 , I can not found this parameter, how to do?

gerald_clark · Post by **gerald_clark** » 2016/08/30 12:46:16

Yum update to the current 6.8 and test again.

mghe · Post by **mghe** » 2016/08/30 13:23:32

This is tcp_delack_min parameter is only available in real time kernel.

b315558547 · Post by **b315558547** » 2016/08/31 01:10:22

mghe wrote:This is tcp_delack_min parameter is only available in real time kernel.

how to install real time kernel?

b315558547 · Post by **b315558547** » 2016/08/31 03:34:18

gerald_clark wrote:Yum update to the current 6.8 and test again.

I installed 6.8, but It do not work too.
I typed echo 1 > /proc/sys/net/ipv4/tcp_delack_min, it come out no such file or directory

mghe · Post by **mghe** » 2016/08/31 06:14:03

b315558547 wrote: how to install real time kernel?

You have to build kernel with patch or install ready one.

Ask on forum about repo real time kernel.

Here more info how to make it yourself.

https://wiki.centos.org/HowTos/Custom_K ... 8kernel%29

https://rt.wiki.kernel.org/index.php/Fr ... nel_3.x:_2

https://access.redhat.com/documentation ... index.html

And repo from cern, but you have to be carefully and read more about it before use, try first on virtual machine.

http://linuxsoft.cern.ch/cern/mrg/slc6X ... el-rt.html

CentOS

how to set tcp_delack_min

how to set tcp_delack_min

Re: how to set tcp_delack_min

Re: how to set tcp_delack_min

Re: how to set tcp_delack_min

Re: how to set tcp_delack_min

Re: how to set tcp_delack_min