Date: Wed, 12 Nov 2003 13:09:17 -0800 (PST) From: matthew tillman <maffew@sbcglobal.net> To: freebsd-smp@freebsd.org Subject: device pcm kills SMP performance -CURRENT Message-ID: <20031112210917.10741.qmail@web80103.mail.yahoo.com>
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Hello- I have an ACorp 6A815EPD motherboard, Intel i815 chipset, with a pair of P3 733s. My sound card, is a SoundBlaster Live Value. Whenever sound support is compiled in the Kernel, performance takes a huge hit, X runs about the same as on a P2 300 or so. But If I boot to a kernel that is configured exactly the same, without device pcm, the system is very responsive. Booting to a non-SMP kernel in 5.1-Release with or without sound support, the system was very fast. I did not try no sound support with SMP, as I thought the issue was only SMP performance in general. I then CVSuped to -CURRENT on Nov 8th, because at the time I didn't realise the issue was isolated to the sound system. However, I still have the same issue. I also tried swapping the card into a diffrent PCI slot, but that didn't help. Any ideas? Thanks, Matthew
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