On Mon, 2008-12-22 at 04:52 -0800, Chuck Forsberg WA7KGX N2469R wrote: > Comcast recently doubled my download speed to something > close to 12 mbit/sec. Now I/O bottlenecks are becoming apparent. > > My server has PCI bus controller cards for two hard drives > and the external network. The local net and the other drives > use motherboard connectors. Processor is an AMD 6000+ > dual core with 8GB memory. > > I can run a compute bound process such as Dhrystone with > no noticeable effect on download speed. However, an > i/o intensive progrma such as quickpar or unrar accessing > data on local disks served by the PCI interface board > slows incoming data to hafe or a third of normal. > > Is the PCI bus that easy to saturate?? > Any inexpensive ways to relieve the bottleneck(s)? Chuck, I doubt that you are event close to congesting your PCI-E bridge and/or HT links. Even you are using a PCI network card (instead of say, onboard GbE NIC and/or PCI-E NIC), you are still capped at ~130MB/s (real-life 100MB/s). To put things in perspective, on a somewhat slower machine (Dual single core Opteron 252), a certain software that I'm using is processing >1.8Gbps (~225MB/s) coming down two GbE links. (Sitting on the PCI-X bus). Having said all that, what protocol are you using to connect to your ISP? L2TP? PPTP? What's your CPU load during normal browsing? - Gilboa -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
