phk at phk.freebsd.dk
Mon Mar 22 20:42:41 UTC 2010
In message <3c0b01821003221207p4e4eecabqb4f448813bf5a8a8 at mail.gmail.com>, Alexa
nder Sack writes:
>Am I going crazy or does this sound a lot like Sun/SVR's stream based
That is a good and pertinent observation.
I did investigate a number of optimizations to the g_up/g_down scheme
I eventually adopted, but found none that gained anything justifying
the complexity they brought.
In some cases, the optimizations used more CPU cycles than the straight
g_up/g_down path, but obviously, the circumstances are vastly different
with CPUs having 10 times higher clock, multiple cores and SSD disks,
so a fresh look at this tradeoff is in order.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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