Date: Sun, 5 Nov 2006 10:09:58 +0800 (CST) From: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw> To: Danny Braniss <danny@cs.huji.ac.il> Cc: freebsd-current@freebsd.org, John Polstra <jdp@polstra.com> Subject: Re: Silly IRQ allocation on Dell 1950 Message-ID: <0611051002019.66040@www.mmlab.cse.yzu.edu.tw> In-Reply-To: <E1GfwlC-000Lrw-Pa@cs1.cs.huji.ac.il> References: <XFMail.20061102080327.jdp@polstra.com> <454A1E47.9060200@samsco.org> <E1GfwlC-000Lrw-Pa@cs1.cs.huji.ac.il>
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On Fri, 3 Nov 2006, Danny Braniss wrote: >> This is typical Dell, and it gets even worse if you have a laptop. >> Imagine every PCI device being on the sole interrupt line that is routed >> on the motherboard. Growing MSI support would get around this for bce >> and many other devices. >> >> Scott >> > why blame only Dell?, this is from a top of the line(?) IBM > > ibm-x3650> vmstat -i > interrupt total rate > irq4: sio0 15 0 > irq15: ata1 47 0 > irq16: bce0 28747 290 > irq17: bce1 aac0 13 0 <----------------- > irq23: uhci0 uhci+ 4 0 > cpu0: timer 193265 1952 > cpu1: timer 193080 1950 > cpu2: timer 191979 1939 > cpu3: timer 191978 1939 > Total 799128 8072 > > with all the hipe on virtualization, I'm wandering if the day > will come and we will have virtual irqs ... Though not bce related, same here on an old Tyan Tiger MPX board: # vmstat -i interrupt total rate irq1: atkbd0 4584 0 irq6: fdc0 9 0 irq14: ata0 10540911 21 irq15: ata1 10540714 21 irq17: fxp0 85976410 175 irq19: fxp1 xl0+ 161770331 330 <----- cpu0: timer 97988242 200 cpu1: timer 97988235 200 Total 464809436 948 I've tried to move the two fxp cards to different PCI slots but still got the same result: one of them seems to "love" the onboard xl0. ;) Swapping one of the fxp with a rl could be a workaround. But to replace fxp with rl? Hmm... -- Cheers, Tai-hwa Liang
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