Messages in this thread |  | | Date | Wed, 7 May 2003 19:36:37 +0200 | From | Jens Axboe <> | Subject | Re: OSDL DBT-2 AS vs. Deadline 2.5.68-mm2 |
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On Wed, May 07 2003, markw@osdl.org wrote: > On 7 May, Jens Axboe wrote: > > On Wed, May 07 2003, markw@osdl.org wrote: > >> I've collected some data from STP to see if it's useful or if there's > >> anything else that would be useful to collect. I've got some tests > >> queued up for the newer patches, but I wanted to put out what I had so > >> far. > >> > >> > >> METRICS OVER LAST 20 MINUTES: > >> --------------- -------- ----- ---- -------- ----------------------------------- > >> Kernel Elevator NOTPM CPU% Blocks/s URL > >> --------------- -------- ----- ---- -------- ----------------------------------- > >> 2.5.68-mm2 as 1155 94.3 8940.2 http://khack.osdl.org/stp/271356/ > >> 2.5.68-mm2 deadline 1255 94.9 9598.7 http://khack.osdl.org/stp/271359/ > >> > >> FUNCTIONS SORTED BY TICKS: > >> -- ------------------------- ------- ------------------------- ------- > >> # as 2.5.68-mm2 ticks deadline 2.5.68-mm2 ticks > >> -- ------------------------- ------- ------------------------- ------- > >> 1 default_idle 6103428 default_idle 5359025 > >> 2 bounce_copy_vec 86272 bounce_copy_vec 97696 > >> 3 schedule 63819 schedule 70114 > >> 4 __make_request 30397 __blk_queue_bounce 31167 > >> 5 __blk_queue_bounce 26962 scsi_request_fn 26623 > >> 6 scsi_request_fn 24845 __make_request 25012 > > > > uhh nasty, you are spending a lot of time bouncing. How much RAM is in > > the machine, and what is the scsi hba? > > The system has 4GB of memory and has a DECchip 21554 (aacraid) that the > external drives are connected to. Mark Haverkamp is currently trying to > address those bounce buffers.
aacraid actually looks sane enough. so you should just be able to set host->highmem_io and it should work.
-- Jens Axboe
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