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Adrian Chadd's Ramblings

Friday, April 10, 2015. Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates. I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions from everyone was "use netmap! For background: http:/ 7-cpu.com/cpu/SandyBridge.html. So, to reproduce: run netmap bridge (eg 'bridge -i netmap:ix0 -i netmap:ix1') and run pkt-gen between two nodes. System Read Throughput(MB/s): 300.68 -. The first theory - the br...

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Friday, April 10, 2015. Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates. I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions from everyone was use netmap! For background: http:/ 7-cpu.com/cpu/SandyBridge.html. So, to reproduce: run netmap bridge (eg 'bridge -i netmap:ix0 -i netmap:ix1') and run pkt-gen between two nodes. System Read Throughput(MB/s): 300.68 -. The first theory - the br...

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Adrian Chadd's Ramblings | adrianchadd.blogspot.com Reviews

https://adrianchadd.blogspot.com

Friday, April 10, 2015. Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates. I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions from everyone was "use netmap! For background: http:/ 7-cpu.com/cpu/SandyBridge.html. So, to reproduce: run netmap bridge (eg 'bridge -i netmap:ix0 -i netmap:ix1') and run pkt-gen between two nodes. System Read Throughput(MB/s): 300.68 -. The first theory - the br...

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adrianchadd.blogspot.com

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Adrian Chadd's Ramblings: TDMA (somewhat) working on AR9380 chips

http://adrianchadd.blogspot.com/2015/02/tdma-somewhat-working-on-ar9380-chips.html

Sunday, February 15, 2015. TDMA (somewhat) working on AR9380 chips. Wow, I have a lot of posts to write to catch up on things.). I've just brought up FreeBSD's TDMA support on the AR9380 chipset. Specifically, the AR9331, since I have a Carambola 2 on me today. It was pretty simple to bring up - I was missing the beacon configuration HAL call that the TDMA code expected. It's only used by the TDMA code - the STA and AP modes rely on the normal HAL beacon methods that date back to the Atheros HAL.

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Adrian Chadd's Ramblings: April 2015

http://adrianchadd.blogspot.com/2015_04_01_archive.html

Friday, April 10, 2015. Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates. I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions from everyone was "use netmap! For background: http:/ 7-cpu.com/cpu/SandyBridge.html. So, to reproduce: run netmap bridge (eg 'bridge -i netmap:ix0 -i netmap:ix1') and run pkt-gen between two nodes. System Read Throughput(MB/s): 300.68 -. The first theory - the br...

3

Adrian Chadd's Ramblings: September 2014

http://adrianchadd.blogspot.com/2014_09_01_archive.html

Friday, September 19, 2014. UDP RSS update: ixbge(4) turned out to have issues. I started digging deeper into the RSS performance on my home test platform. Four cores and one (desktop) socket isn't all that much, but it's a good starting point for this. It turns out that there was some lock contention inside netisr. Which made no sense, as RSS should be keeping all the flows local to each CPU. Sep 12 08:04:32 adrian-hackbox kernel: ix0: ixgbe rxeof: 100034:. M=0xfffff80047279b00; flowid=0x335a5c03; rxr- ...

4

Adrian Chadd's Ramblings: July 2014

http://adrianchadd.blogspot.com/2014_07_01_archive.html

Monday, July 21, 2014. Application awareness of receive side scaling (RSS) on FreeBSD. Part of testing this receive side scaling work is designing a set of APIs that allow for some kind of affinity awareness. It's not easy - the general case is difficult and highly varying. But something. Has to be tested! So, where should it begin? The main tricky part of this is the difference between incoming, outgoing and listening sockets. For an incoming socket, all the information about the destination CPU can be ...

5

Adrian Chadd's Ramblings: October 2014

http://adrianchadd.blogspot.com/2014_10_01_archive.html

Tuesday, October 28, 2014. More RSS UDP tests - this time on a Dell R720. I've recently had the chance to run my RSS UDP test suite up on a pair of Dell R720s. They came with on-board 10G Intel NICs (ixgbe(4) in FreeBSD) so I figured I'd run my test suite up on it. Thank you to the Enterprise Storage Division at Dell for providing hardware for me to develop on! CPU: Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz (2000.04-MHz K8-class CPU) x 2. Until ncpus is tunable, make it use 8 buckets. Each CPU is transmit...

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FSF Certifies Device—little people did this. | My Blog

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Just another WordPress.com site. My aperiodic report about usage of GNU/Linux →. May 1, 2013. FSF Certifies USB Wifi Device—little people change the world. Certification of the ThinkPenguin TPE-N150USB. Wireless N USB Adapter, which uses the Atheros ARAR9271 chip. This little note makes all the difference:. And Luis Rodriguez, made the internal-push to get the firmware released. As free software.”. I am a teacher / biologist with eclectic interests. View all posts by lngndvs →. Leave a Reply Cancel reply.

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Adrian Chadd's Ramblings

Friday, April 10, 2015. Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates. I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions from everyone was "use netmap! For background: http:/ 7-cpu.com/cpu/SandyBridge.html. So, to reproduce: run netmap bridge (eg 'bridge -i netmap:ix0 -i netmap:ix1') and run pkt-gen between two nodes. System Read Throughput(MB/s): 300.68 -. The first theory - the br...

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