Re: [patch 2/2] backport of sba sg list management to ccio-dma
Joel Soete <[email protected]> Thu, 01 Nov 2007 17:18:01 +0000
| Newsgroups | gmane.linux.ports.hppa |
|---|---|
| Message-ID | <[email protected]> |
Grant, Just come back here because I don't understand this strange stuff: Grant Grundler wrote: [snip] > ... > #ifdef CCIO_SEARCH_TIME > + udelay(100); > > Did you want to keep udelay() call? > here is short test: without udelay: # scp vmlinux jso@patst007:/var/tmp/vmlinux-2.6.23-pa-d32up3 Password: vmlinux 100% 4364KB 101.5KB/s 00:43 with udelay: # scp vmlinux jso@patst007:/var/tmp/vmlinux-2.6.23-pa-d32up3 Password: vmlinux 100% 4364KB 436.4KB/s 00:10 well still far from what we could expect (about 800KB/s) but fwiw something supposing slowdown the kernel improve nic perf?