Date: Sat, 12 Jun 2010 22:33:04 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/cxgb cxgb_adapter.h cxgb_sge.c Message-ID: <201006122233.o5CMXOeQ083654@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
np 2010-06-12 22:33:04 UTC
FreeBSD src repository
Modified files:
sys/dev/cxgb cxgb_adapter.h cxgb_sge.c
Log:
SVN rev 209116 on 2010-06-12 22:33:04Z by np
cxgb(4): add knob to get packet timestamps from the hardware.
The T3 ASIC can provide an incoming packet's timestamp instead of its RSS hash.
The timestamp is just a counter running off the card's clock. With a 175MHz
clock an increment represents ~5.7ns and the 32 bit value wraps around in ~25s.
# sysctl -d dev.cxgbc.0.pkt_timestamp
dev.cxgbc.0.pkt_timestamp: provide packet timestamp instead of connection hash
# sysctl -d dev.cxgbc.0.core_clock
dev.cxgbc.0.core_clock: core clock frequency (in KHz)
# sysctl dev.cxgbc.0.core_clock
dev.cxgbc.0.core_clock: 175000
Revision Changes Path
1.55 +2 -0 src/sys/dev/cxgb/cxgb_adapter.h
1.91 +51 -16 src/sys/dev/cxgb/cxgb_sge.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201006122233.o5CMXOeQ083654>