From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3833C328.CD5AA36D@wanadoo.fr> Date: Thu, 18 Nov 1999 10:13:12 +0100 From: Martin Costabel MIME-Version: 1.0 To: Geert Uytterhoeven , Dev-Linux Subject: Re: Kernel debugging?? References: <38333EDA.D5DA1F47@wanadoo.fr> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Martin Costabel wrote: > > (*) Correction. I ran rsync while typing this letter. It's 2.3.28 now. I > am curious to see how this will run. Followup: Paul's 2.3.28 runs very well on my 6400. One curious thing, though: I played with hdparm for the internal IDE disk. Turns out that it is faster with DMA turned OFF (I did a PIO autotune hdparm -p before): root[90]#hdparm -d0 /dev/hda /dev/hda: setting using_dma to 0 (off) using_dma = 0 (off) root[91]#hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 64 MB in 2.91 seconds =21.99 MB/sec Timing buffered disk reads: 32 MB in 5.62 seconds = 5.69 MB/sec root[92]#hdparm -d1 /dev/hda /dev/hda: setting using_dma to 1 (on) using_dma = 1 (on) root[93]#hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 64 MB in 2.91 seconds =21.99 MB/sec Timing buffered disk reads: 32 MB in 10.21 seconds = 3.13 MB/sec This is repeatable. And there is still some strange swapping going on that shouldn't be necessary (no high charge, just some window switching in X). But now that I went back to BootX-1.1.3, the overall speed is OK. -- Martin ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/