Date: Wed, 24 Mar 2010 17:13:19 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/msk if_msk.c if_mskreg.h Message-ID: <201003241713.o2OHDc1d063531@repoman.freebsd.org>
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yongari 2010-03-24 17:13:19 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/dev/msk if_msk.c if_mskreg.h
Log:
SVN rev 205610 on 2010-03-24 17:13:19Z by yongari
MFC r204541:
Implement rudimentary interrupt moderation with programmable
countdown timer register. The timer resolution may vary among
controllers but the value would be represented by core clock
cycles. msk(4) will automatically computes number of required clock
cycles from given micro-seconds unit.
The default interrupt holdoff timer value is 100us which will
ensure less than 10k interrupts under load. The timer value can be
changed with dev.mskc.0.int_holdoff sysctl node.
Note, the interrupt moderation is shared resource on dual-port
controllers so you can't use separate interrupt moderation value
for each port. This means we can't stop interrupt moderation in
driver stop routine. Also have msk_tick() reclaim transmitted Tx
buffers as safety belt. With this change there is no need to check
missing Tx completion interrupt in watchdog handler, so remove it.
Revision Changes Path
1.18.2.37 +20 -20 src/sys/dev/msk/if_msk.c
1.6.2.21 +3 -0 src/sys/dev/msk/if_mskreg.h
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