Hey, I was doing some tests of ethernet performance on Broadcom's SoCs and I may need your advise on that.
As you know transfers between separated VLANs aren't really nice for the CPU. Linux has to receive packets, pass them through the firewall and them send to the target VLAN. I'm aware we can't expect full speed in that case, but I'm a little worried by the performance anyway. I did some tests using "iperf" for various transfers. 1) Between two machines in the same VLAN: 710Mb/s 2) Between separated VLANs (WAN to LAN): 90Mb/s 3) Machine to router (iperf -s on OpenWrt): 180Mb/s That 90Mb/s speed it pretty slow, there are Internet providers with a faster connections in their offer. So I really would like to improve that. I know Broadcom managed to get much faster transfers with their firmware, so it's definitely do-able. Do you have any suggestions on achieving that? I was doing above test with some BCM4706 router, in "top" I noticed "sirq" eating 99% of the CPU (similar report: https://dev.openwrt.org/ticket/7356). Should I play with some profiler? /proc/profile (and readprofile user space tool) doesn't support profiling modules :( I didn't play much time with oprofile yet, unfortunately it's new profiling method doesn't support MIPS (http://oprofile.sourceforge.net/doc/perf_events.html) - so I have to play with legacy profiling method. Anyway, maybe you have some suggestions that will help me focus my efforts on the right direction? -- Rafał _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
