Date: Fri, 19 Jun 2009 23:34:32 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/conf files src/sys/dev/cxgb cxgb_adapter.h cxgb_main.c cxgb_multiq.c cxgb_osdep.h cxgb_sge.c src/sys/dev/cxgb/common cxgb_t3_cpl.h src/sys/dev/cxgb/sys cxgb_support.c mvec.h uipc_mvec.c src/sys/modules/cxgb/cxgb ... Message-ID: <200906192334.n5JNYpTU019465@repoman.freebsd.org>
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kmacy 2009-06-19 23:34:32 UTC
FreeBSD src repository
Modified files:
sys/conf files
sys/dev/cxgb cxgb_adapter.h cxgb_main.c cxgb_osdep.h
cxgb_sge.c
sys/dev/cxgb/common cxgb_t3_cpl.h
sys/dev/cxgb/sys mvec.h uipc_mvec.c
sys/modules/cxgb/cxgb Makefile
Removed files:
sys/dev/cxgb cxgb_multiq.c
sys/dev/cxgb/sys cxgb_support.c
Log:
SVN rev 194521 on 2009-06-19 23:34:32Z by kmacy
Greatly simplify cxgb by removing almost all of the custom mbuf management logic
- remove mbuf iovec - useful, but adds too much complexity when isolated to
the driver
- remove driver private caching - insufficient benefit over UMA to justify
the added complexity and maintenance overhead
- remove separate logic for managing multiple transmit queues, with the
new drbr routines the control flow can be made to much more closely resemble
legacy drivers
- remove dedicated service threads, with per-cpu callouts one can get the same
benefit much more simply by registering a callout 1 tick in the future if there
are still buffered packets
- remove embedded mbuf usage - Jeffr's changes will (I hope) soon be integrated
greatly reducing the overhead of using kernel APIs for reference counting
clusters
- add hysteresis to descriptor coalescing logic
- add coalesce threshold sysctls to allow users to decide at run-time
between optimizing for forwarding / UDP or optimizing for TCP
- add once per second watchdog to effectively close the very rare races
occurring from coalescing
- incorporate Navdeep's changes to the initialization path required to
convert port and adapter locks back to ordinary mutexes (silencing BPF
LOR complaints)
- enable prefetches in get_packet and tx cleaning
Reviewed by: navdeep@
MFC after: 2 weeks
Revision Changes Path
1.1440 +0 -4 src/sys/conf/files
1.11 +15 -6 src/sys/dev/cxgb/common/cxgb_t3_cpl.h
1.46 +38 -81 src/sys/dev/cxgb/cxgb_adapter.h
1.89 +363 -316 src/sys/dev/cxgb/cxgb_main.c
1.20 +0 -594 src/sys/dev/cxgb/cxgb_multiq.c (dead)
1.31 +9 -12 src/sys/dev/cxgb/cxgb_osdep.h
1.73 +662 -555 src/sys/dev/cxgb/cxgb_sge.c
1.11 +0 -305 src/sys/dev/cxgb/sys/cxgb_support.c (dead)
1.17 +24 -282 src/sys/dev/cxgb/sys/mvec.h
1.32 +22 -311 src/sys/dev/cxgb/sys/uipc_mvec.c
1.14 +1 -1 src/sys/modules/cxgb/cxgb/Makefile
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