Hi Renesanso, On Fri, 2013-03-22 at 12:13 +0400, Фонкин Алексей wrote: > Hi. > > I use targetcli and LIO Linux stack with FC-to-FC PtP connection > (target and initiator is QLogic qle2440 ( 02:00.0 Fibre Channel: > QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev > 02) )). > UI of targetcli is very simple, all work ok with 3.9 kernel, but I > have performance troubles. Without buffered=true (fileio) or with it > sequential r/o is very slow (near 5Mb/s), on random w/o (many files > copy, not true random) i have 0.04 Mb/s on Windows 7. I can't install > windows (4% and very fast bilking HDD led on target. From HDD sound I > can think, that there are aggressive random i/o) in 10 hours period. > On fedora (run on the same (physical same, not other clone) I have > sequential performance near 35 Mb/s, random (many files copy, not > true random) - 9 Mb/s. Fedora installs and boot (with firmware insert > in dracut) fine, works ok. > > If I use file on ramdisk, but not file on HDD in fileio, I have > performance near 360Mb/s, that very good for me. On target (localhost > root access) I have 125Mb/s on sequential r/o to file on HDD. Enabling > buffered=true (fileio) give me 1-2Mb/s more on seq r/o, and near 10% > on random, but I don't see any cache, buffer, used change (as when I > use file locally) changes. What does /sys/kernel/config/target/core/$FILEIO_HBA/$FILEIO_DEV/info output look like..? You'll want to check that 'Mode: Buffered-WCE' is getting enabled after target-restart (see below) > What I need to do to improve fileio performance on file on HDD? I > thinks on linux-linux variant there are bottle neck in some detail, > but in windows variant (I think, but can't prove) there are no or too > small buffers to vitual FC HDD (via HBA). > The FILEIO default Mode O_DSYNC is probably getting reset if you don't have the following lio-utils patch in place to save fd_buffered_io=: http://www.risingtidesystems.com/git/?p=lio-utils.git;a=commitdiff;h=5d0f4829aa130619e81edad3fe0aaa697fa00be4 that adds the ',fd_buffered_io=[0,1]' string to --establishdev calls based upon active /sys/kernel/config/core/$FILEIO_HBA/$FILEIO_DEV/info, and should generate the following for /etc/target/tcm_start.sh: tcm_node --establishdev $FILEIO_HBA/$FILEIO_DEV fd_dev_name=$FILEIO_PATH,fd_dev_size=$FILEIO_SIZE,fd_buffered_io=1 Thanks, --nab -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
