Hi Björn, Currently FSL uses dylan for QorIQ SDK release, and the kernel in both dylan and dora of meta-fsl-ppc are 3.8.
Do you have the performance number with recent dylan branch(3.8 kernel)? Is there any performance gap for dylan and dora with same kernel version? Best Regards, Zhenhua > -----Original Message----- > From: [email protected] [mailto:meta-freescale- > [email protected]] On Behalf Of Bj?rn Stenberg > Sent: Monday, November 18, 2013 11:43 PM > To: [email protected] > Subject: [meta-freescale] P4080 IP routing performance regression > > Hi all. > > We have found a performance regression in the linux-qoriq kernel released > for dora. IP routing performance for small packets has decreased by over > 20% between kernels 3.0.51 (dylan) and 3.8.13 (dora). > > The test uses two 10 Gbit interfaces on a p4080ds board. We feed UDP > packets at full speed into the first interface and measure how many > packets make it out of the second interface. Here are the results: > > Frame Kernel Kernel > Size 3.0.51 3.8.13 Change > ---- ------ ------ ------ > 64 28.8 21.9 -24% > 128 50.9 38.8 -24% > 256 90.8 71.1 -22% > 512 99.1 99.1 > 1024 100 100 > 1280 100 100 > 1518 99.9 99.9 > 2048 100 100 > 4096 100 100 > 8192 100 100 > 8980 100 100 > > The values are in percent, out of the theoretical maximum. These numbers > are for IPv6, but IPv4 looks roughly the same. > > These are the kernel configurations used: > > 3.0.51 kernel config: http://pastebin.com/L0c0fTuU > 3.8.13 kernel config: http://pastebin.com/wbZcVGQM > > -- > Björn > _______________________________________________ > meta-freescale mailing list > [email protected] > https://lists.yoctoproject.org/listinfo/meta-freescale _______________________________________________ meta-freescale mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-freescale
