Difference between revisions of "Testing Load Balancer Bandwidth"

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(Created page with "= Transmission between 4 senders on various ejfat nodes to the Load Balancer ejfat-1 and from there to 4 receivesr on ejfat-1(Sep 2022) = <font size="+1">Here we test the d...")
 
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= Transmission between 4 senders on various ejfat nodes to the Load Balancer ejfat-1 and from there to 4 receivesr on ejfat-1(Sep 2022) =
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= Transmission between 4 senders on various ejfat nodes to the Load Balancer on ejfat-1 and from there to 4 receivers on ejfat-1 (Sep 2022) =
  
  
  
<font size="+1">Here we test the data rate between 4 single threaded UDP senders and corresponding 4 single threaded receivers. In one test, data was sent from senders on ejfat-2 to LB on ejfat-1 (172.19.22.241). In another test, there was one sender on each of ejfat-2, 3, 4, and 5. Both showed the same behavior The following was used to send:</font>
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<font size="+1">Here we measure the data rate between 4 single threaded UDP senders and corresponding 4 single threaded receivers. In one test, data was sent from all senders on ejfat-2 to the LB on ejfat-1 (172.19.22.241). In another test, there was one sender on each of ejfat-2, 3, 4, and 5. Both showed the same behavior The following was used to send:</font>
 
<pre>
 
<pre>
./packetBlaster -p 19522 -host 172.19.22.241 -mtu 9000 -s 25000000  -b 100000 -cores 80 (81,82,83
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./packetBlaster -p 19522 -host 172.19.22.241 -mtu 9000 -s 25000000  -b 100000 -cores 80 (81,82,83)
 
</pre>
 
</pre>
 
<font size="+1">in which the UDP Send buffer = 50MB and the app sent buffers of 100kB. The receiver was run as:</font>
 
<font size="+1">in which the UDP Send buffer = 50MB and the app sent buffers of 100kB. The receiver was run as:</font>
 
<pre>
 
<pre>
./packetBlastee  -p 17750 -b 400000 -r 25000000 -cores 80
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./packetBlastee  -p 17750 -b 400000 -r 25000000 -cores 80 (81,82,83)
 
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</pre>
  

Revision as of 16:03, 13 September 2022

Transmission between 4 senders on various ejfat nodes to the Load Balancer on ejfat-1 and from there to 4 receivers on ejfat-1 (Sep 2022)

Here we measure the data rate between 4 single threaded UDP senders and corresponding 4 single threaded receivers. In one test, data was sent from all senders on ejfat-2 to the LB on ejfat-1 (172.19.22.241). In another test, there was one sender on each of ejfat-2, 3, 4, and 5. Both showed the same behavior The following was used to send:

./packetBlaster -p 19522 -host 172.19.22.241 -mtu 9000 -s 25000000  -b 100000 -cores 80 (81,82,83)

in which the UDP Send buffer = 50MB and the app sent buffers of 100kB. The receiver was run as:

./packetBlastee  -p 17750 -b 400000 -r 25000000 -cores 80 (81,82,83)

The sending and receiving threads were pinned to core #80. This is because cores 80-87 are on the same NUMA node as the NIC and perform by far the best when transferring data. When the same test was run pinning the threads to core #1 (on worst performing node) the max transfer rate was 1000 MB/s. After that packets were constantly being dropped.


The following graph shows the CPU usage of both sender and receiver as a function of the data rate.