Re: SuperMicro H8SSL-i (ServerWorks HT1000) -- WAS: Sun Fire X2100/nForce4 Ultra desktop
"Bryan J. Smith" <[email protected]>
| Newsgroups | gmane.linux.redhat.amd64 |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 2005-11-29 at 05:58 -0500, Bryan J. Smith wrote: > According to the BCM5704*1* product brief, each NIC has its own RISC > off-loading processor 16KiB of SRAM as well as dual 64KiB RAM packet > buffer. You might be eyeing the $50-60 SysKonnect SK-9E21D*2* PCIe x1 > NIC, it has a 48KiB RAM packet buffer (no RISC+SRAM off-load engine -- > just a "large send off-load"). Even the $125-150+, server-designed PCIe > x1 SK-9E21 or PCIe x4 SK-9E21 (PCI-X equivalent SK-9S21 and SK-9S22, > respectively) doesn't seem to offer any off-load other than "large send > off-load" (can't tell how good, the manual is in French or German and > doesn't make any mention of SRAM), only 2x the RAM (per port), 96KiB. > *1* Broadcom BCM5704 Product Brief (first page): > http://www.broadcom.com/collateral/pb/5704C-PB04-R.pdf > *2* SysKonnect SK-9E21D Manual (page 41, PDF page 39): > http://www.skd.de/e_en/products/adapters/pcie_desktop/sk-9exxd/docu/Sk-9E21D_E.pdf Actually, I was doing some research, and it seems that only LSO is supported in the BCM5704 firmware under Linux. And it seems that most "quality" TX/RX designs these days have 16KiB SRAM so they can handle up to 16KiB Jumbo frames. You only need to be careful about the NICs that have only 2-4KiB SRAM TX/RX that can't handle jumbo frames. -- Bryan J. Smith mailto:[email protected] http://thebs413.blogspot.com ------------------------------------------ Some things (or athletes) money can't buy. For everything else there's "ManningCard."