Re: 9.1: boot-time delay?

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

	Hello.  Is there a reason you need a frequency that high?  Will HZ=1000 be sufficient and
does that reduce the boot time?  
Also,while I don't entirely understand all the timing mechanisms inside NetBSD, it seems if you
do need a higher frequency clock, I'd suggest HZ=10000, since it's a factor of 100 times the
default, rather than an odd 80 times the default.
-thanks
-Brian

On May 25,  9:44am, Mouse wrote:
} Subject: Re: 9.1: boot-time delay?
} Last week, I wrote, here, of a delay when booting 9.1
} 
} >>> [     3.288539] uhub2: 4 ports with 4 removable, self powered
} >>> [     3.288539] uhub3: 6 ports with 6 removable, self powered
} >>> [    25.272567] wd0 at atabus0 drive 0
} >>> [    25.273568] wd0: <ST500DM002-1BD142>
} 
} and, in a later mail,
} 
} > [A]s soon as I sent my mail and started looking at subsetting diffs,
} > I discovered the diffs between the installer kernel and the
} > operational kernel were far smaller than I remembered (and mostly
} > irrelevant):
} 
} It looks as though this, of all things, is the relevant line:
} 
} > +options 	HZ=8000
} 
} My first reaction is that something somewhere is delaying by a fixed
} number of ticks rather than doing arithmetic with hz, but that would
} make the difference go in the other direction.  I'm having trouble
} coming up with a plausible scenario that would explain the delay
} getting _longer_ with HZ=8000.  The most plausible thing I've thought
} of is that some delay is being computed based on hz and then getting
} treated as milliseconds instead of ticks or some such and getting
} multiplied by hz again.
} 
} Anyone have any thoughts on possible ways to track this one down?  I'm
} going to be doing what I can, but any thoughts anyone has would be
} welcomed; I am only minimally familiar with 9.1's kernel internals.
} 
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