<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span style="font-size: 14px;" class="">Hi Folks,</span><div class=""><span style="font-size: 14px;" class=""><br class=""></span></div><div class=""><span style="font-size: 14px;" class="">Hope to humbly ask for some advice if this list is still active. I’m supporting a legacy product and looking to improve networking performance. It is a PPC460GT used as a bridge device with an ethernet 1Gb (marvell), that routes packets to a pci network card (using igb).</span></div><div class=""><span style="font-size: 14px;" class="">Going in the pci interface and out tx to the network, we get a nominal 700Mb, however…</span></div><div class=""><span style="font-size: 14px;" class=""><br class=""></span></div><div class=""><span style="font-size: 14px;" class="">RX - to the marvell we see two things:</span></div><div class=""><span style="font-size: 14px;" class="">1. 300Mbps</span></div><div class=""><span style="font-size: 14px;" class="">2. sys = 100%</span></div><div class=""><span style="font-size: 14px;" class=""><br class=""></span></div><div class=""><span style="font-size: 14px;" class="">Any ideas? I’m suspicious that packets are not being handled at a low level and getting copied through iptables rules to userspace. Maybe there is a way to enable DMA to the benefit of incoming packets?</span></div><div class=""><span style="font-size: 14px;" class=""><br class=""></span></div><div class=""><span style="font-family: Calibri, sans-serif; font-size: 14px;" class="">Linux mbu-100 2.6.33.1 #245 Fri Nov 1 17:41:21 PDT 2013 ppc GNU/Linux</span></div><div class=""><span style="font-family: Calibri, sans-serif; font-size: 14px;" class="">Glacier </span></div><div class=""><span style="font-family: Calibri, sans-serif; font-size: 14px;" class=""><br class=""></span></div><div class=""><span style="font-family: Calibri, sans-serif; font-size: 14px;" class="">Thanks!</span></div><div class=""><span style="font-family: Calibri, sans-serif; font-size: 14px;" class="">Bill</span></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class=""><br class=""></div><div class=""><br class=""></div></div></body></html>