On 09/13/12 13:13, Garrett Cooper wrote: > On Thu, Sep 13, 2012 at 12:54 PM, matt <sendtomatt_at_gmail.com> wrote: >> On 09/10/12 19:31, Garrett Cooper wrote: > ... > >> It seems hw.mfi.max_cmds is read only. The performance is pretty close to >> expected with no nvram or bbu on this card and commodity disks from 1.5 >> years ago, as far as I'm concerned. I'd love better write performance, but >> it's probably being held back by the single platter in the mirror when it is >> writing far from its edge. > Try loader.conf: > > $ grep -r hw.mfi.max_cmds /sys/dev/mfi/ > /sys/dev/mfi/mfi.c:TUNABLE_INT("hw.mfi.max_cmds", &mfi_max_cmds); > > Cheers, > -Garrett $ cat /usr/src/sys/dev/mfi/*.c | fgrep 'max_cmds' static int mfi_max_cmds = 128; TUNABLE_INT("hw.mfi.max_cmds", &mfi_max_cmds); SYSCTL_INT(_hw_mfi, OID_AUTO, max_cmds, CTLFLAG_RD, &mfi_max_cmds, ncmds = MIN(mfi_max_cmds, sc->mfi_max_fw_cmds); Definitely a loader tunable, thanks. I'll try increasing and decreasing the value and running bonnie again...Still not sure whether I'm getting 3gb/s and 6gb/s negotiation with my drives. MPS correctly reported da devices with 600mb/s and 300mb/s transfers where appropriate. mfiutil doesn't seem to know, and mfip devices appear as 150mb/s. No transfer speed message when mfisyspd devices attach. MattReceived on Thu Sep 13 2012 - 18:49:55 UTC
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