Messages in this thread | | | Date | Fri, 7 May 1999 04:53:49 -0700 | From | <> | Subject | Re: Overscheduling DOES happen with high web server load. |
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Date: Thu, 6 May 1999 17:52:10 -0700 From: jg@pa.dec.com (Jim Gettys)
So theory is therefore that the HZ rate was taken from what Digital UNIX was using and applied without further thought.
One further theory, from the networking perspective, is that a higher resolution HZ allows you to use more accurate timestamping in TCP and thus get more accurate round trip estimates. I don't know if the Digital people had specifically thought about this at the time.
I had considered the issue of using a larger HZ value on UltraSparc, but:
1) I only did so way after I had the foundation of the port almost done
2) The desire to run as many existing 32-bit Sparc binaries as possible without recompilation precluded things a bit
Later, David S. Miller davem@redhat.com
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