[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-02-05 Thread Alexander Belyakov
De Lara Guarch, Pablo >>> >>> > wrote: >>> >>> > Hi Alexander, >>> >>> > >>> >>> > > -Original Message- >>> >>> > > From: dev [mailto:dev-bounces at dpdk.org ] On >>

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-29 Thread Alexander Belyakov
Message- >> >> > > From: dev [mailto:dev-bounces at dpdk.org ] On >> Behalf Of Alexander >> >> > Belyakov >> >> > > Sent: Monday, January 26, 2015 10:18 AM >> >> > > To: dev at dpdk.org >> >> > > Subject

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-28 Thread Alexander Belyakov
5:22 PM, De Lara Guarch, Pablo > > > wrote: > > > Hi Alexander, > > > > > > > -Original Message- > > > > From: dev [mailto:dev-bounces at dpdk.org ] On > Behalf Of Alexander > > > Belyakov > > > > Sent

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-27 Thread De Lara Guarch, Pablo
; > -Original Message- > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Alexander > Belyakov > > Sent: Monday, January 26, 2015 10:18 AM > > To: dev at dpdk.org<mailto:dev at dpdk.org> > > Subject: [dpdk-dev] DPDK testpmd forwarding

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-27 Thread Alexander Belyakov
rom: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Alexander Belyakov >> > Sent: Monday, January 26, 2015 10:18 AM >> > To: dev at dpdk.org >> > Subject: [dpdk-dev] DPDK testpmd forwarding performace degradation >> > >> > Hello, >> > >>

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-27 Thread Alexander Belyakov
Hello, On Tue, Jan 27, 2015 at 5:49 AM, ??? wrote: > 65 bytes frame may degrade performace a lot.Thats related to DMA and cache. > When NIC dma packets to memory, NIC has to do read modify write if DMA > size is partial cache line.So for 65 bytes, the first 64 bytes are ok. The > next 1 byte NIC

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-27 Thread 吴亚东
65 bytes frame may degrade performace a lot.Thats related to DMA and cache. When NIC dma packets to memory, NIC has to do read modify write if DMA size is partial cache line.So for 65 bytes, the first 64 bytes are ok. The next 1 byte NIC has to read the whole cache line, change one byte and updat

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-26 Thread Stephen Hemminger
On Mon, 26 Jan 2015 13:17:48 +0300 Alexander Belyakov wrote: > Hello, > > recently I have found a case of significant performance degradation for our > application (built on top of DPDK, of course). Surprisingly, similar issue > is easily reproduced with default testpmd. > > To show the case we

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-26 Thread De Lara Guarch, Pablo
Hi Alexander, > -Original Message- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Alexander Belyakov > Sent: Monday, January 26, 2015 10:18 AM > To: dev at dpdk.org > Subject: [dpdk-dev] DPDK testpmd forwarding performace degradation > > Hello, > &

[dpdk-dev] DPDK testpmd forwarding performace degradation

2015-01-26 Thread Alexander Belyakov
Hello, recently I have found a case of significant performance degradation for our application (built on top of DPDK, of course). Surprisingly, similar issue is easily reproduced with default testpmd. To show the case we need simple IPv4 UDP flood with variable UDP payload size. Saying "packet le