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authorjonathan <jonathan@NetBSD.org>2005-02-28 18:44:45 +0000
committerjonathan <jonathan@NetBSD.org>2005-02-28 18:44:45 +0000
commitfba9c4c1b9bc39085441eb351b9eecf50049e2aa (patch)
tree8c339966f9afae8acfce099002577268f3ee0e97 /sys/dev/microcode/isp
parent6c46d7f51c9f2236f9f68d2121414d1d7a1433ab (diff)
Increase default value for IFQ_MAXLEN from 50 to 256.
The value of 50 dates back to 4.3BSD and 10Mbit interfaces. Gigabit interfaces are 100x faster, and by observation, when heavy interrupt mitigation is enabled, gigabit interfaces can enqueue 40 packets or more in a single hardware interrupt. So IFQ_MAXLEN of 256 is adequate for at least four gigabit interfaces. Increasing IFQ_MAXLEN discussed and approved, in priniciple, circa Apr 2004. The value is sysctl'able, so the default is no longer so critical, but (imho) best to tune for high-performane systems by default.
Diffstat (limited to 'sys/dev/microcode/isp')
0 files changed, 0 insertions, 0 deletions