Pyun YongHyeon d94f2b8506 Add workaround to overcome hardware limitation which allows only a ... single outstanding DMA read operation. Most controllers targeted to client with PCIe bus interface(e.g. BCM5761) may have this limitation. All controllers for servers does not have this limitation. Collapsing mbuf chains to reduce number of memory reads before transmitting was most effective way to workaround this. I got about 940Mbps from 850Mbps with mbuf collapsing on BCM5761. However it takes a lot of CPU cycles to collapse mbuf chains so add tunable to control the number of allowed TX buffers before collapsing. The default value is 0 which effectively disables the forced collapsing. For most cases 2 would yield best performance(about 930Mbps) without much sacrificing CPU cycles. Note the collapsing is only activated when the controller is on PCIe bus and the frame does not need TSO operation. TSO does not seem to suffer from the hardware limitation because the payload size is much bigger than normal IP datagram. Thanks to davidch@ who told me the limitation of client controllers and actually gave possible workarounds to mitigate the limitation. Reviewed by: davidch, marius		2009-12-03 23:57:06 +00:00
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amd64	mca: small enhancements related to cpu quirks	2009-12-03 16:10:21 +00:00
arm	Add missing ath_ar9* ath hal entries.	2009-12-02 00:38:11 +00:00
boot	Remove spinconsole from pc98, some parts seem to be missed and it's	2009-11-27 13:19:06 +00:00
bsm	Add audit events for process descriptor system calls, which will appear in	2009-09-29 21:25:59 +00:00
cam	Fix several cases where the periph lock was held over malloc.	2009-12-02 16:08:33 +00:00
cddl	Correct another case of not doing 64bit math. This allows mine and	2009-11-13 02:50:50 +00:00
compat	Include <sys/tty.h> instead of <sys/termios.h>.	2009-11-28 16:30:06 +00:00
conf	Remove extra parantheses from usb_ethernet.c and usb_serial.c lines.	2009-11-30 21:03:44 +00:00
contrib	Merge ACPICA 20091112.	2009-11-16 21:47:12 +00:00
crypto
ddb	Among signal generation syscalls, only sigqueue(2) is allowed by POSIX	2009-11-17 11:39:15 +00:00
dev	Add workaround to overcome hardware limitation which allows only a	2009-12-03 23:57:06 +00:00
fs	Remove unneeded ifdefs.	2009-12-03 18:03:42 +00:00
gdb
geom	Change 'load' balancing mode algorithm:	2009-12-03 21:47:51 +00:00
gnu	Remove unused code.	2009-12-03 18:16:14 +00:00
i386	mca: small enhancements related to cpu quirks	2009-12-03 16:10:21 +00:00
ia64	Make sure bus space accesses use unorder memory loads and stores.	2009-12-03 04:06:48 +00:00
isa	- Partially revert hackish r198964 and r199002.	2009-11-12 17:56:56 +00:00
kern	Remove wrong assertion. Debugee is allowed to lose a signal.	2009-12-03 20:16:59 +00:00
kgssapi	When the KOBJMETHOD() macro was updated, it resulted in the	2009-06-14 17:33:46 +00:00
libkern	Move inet_aton() (specular to inet_ntoa(), already present in libkern)	2009-11-12 00:46:28 +00:00
mips	Simplify the invocation of vm_fault(). Specifically, eliminate the flag	2009-11-27 20:24:11 +00:00
modules	amdsbwd: new driver for AMD SB600/SB7xx watchdog timer	2009-11-30 11:44:03 +00:00
net	Remove if_timer/if_watchdog now that they are no longer used. The space	2009-11-30 21:25:57 +00:00
net80211	Remove trailing ";" in struct ieee80211_beacon_offsets declaration	2009-11-11 15:00:56 +00:00
netatalk	Reverse misordered unlock and lock in at_control for netatalk phase I	2009-08-12 10:44:13 +00:00
netgraph	Take a step towards removing if_watchdog/if_timer. Don't explicitly set	2009-11-06 14:55:01 +00:00
netinet	preparation work to replace the monster switch in ipfw_chk() with	2009-12-03 14:22:15 +00:00
netinet6	Adapt r197136 to IPv6 stack:	2009-11-19 13:39:07 +00:00
netipsec	Enable IPcomp by default.	2009-11-29 20:47:43 +00:00
netipx	Use queue(9) instead of hand-crafted link lists for the global IPX	2009-06-24 20:57:50 +00:00
netnatm
netncp
netsmb	Don't print out a message on loading a module. 'kldload -v' and 'kldstat	2009-09-10 18:33:08 +00:00
nfs	Revert rev 192323 (nfs_common.c only):	2009-07-12 03:53:52 +00:00
nfsclient	Close a race with caching of -ve name lookups in the NFS client.	2009-10-16 19:30:48 +00:00
nfsserver	Properly return an error reply if an NFS remove or link operation fails.	2009-12-03 20:59:28 +00:00
nlm	Handle GRANTED_RES messages more gracefully: Send along a grant cookie	2009-10-07 19:50:14 +00:00
opencrypto	In case the compression result is the same size as the orignal version,	2009-11-29 17:53:57 +00:00
pc98	Fix cut'n paste on the AR9280 entry.	2009-12-02 21:22:10 +00:00
pci	intpm/sb700: force polling mode if configured interrupt is SMI	2009-09-19 08:56:28 +00:00
powerpc	The first argument of dcbz interprets r0 as a literal zero, not the second.	2009-12-03 20:55:09 +00:00
rpc	Add a check for the connection being shut down to the krpc	2009-11-08 19:02:13 +00:00
security	Having thrown the cat out of the house, add a necessary include.	2009-09-08 13:24:36 +00:00
sparc64	Simplify the invocation of vm_fault(). Specifically, eliminate the flag	2009-11-27 20:24:11 +00:00
sun4v	Simplify the invocation of vm_fault(). Specifically, eliminate the flag	2009-11-27 20:24:11 +00:00
sys	Bump __FreeBSD_version for sigpause(3) addition [1] and	2009-12-02 16:40:23 +00:00
teken	Place home and end before insert and delete.	2009-11-11 09:43:26 +00:00
tools	Output a comment on top of each generated file explaining where it came	2009-10-25 09:48:21 +00:00
ufs	Don't build ufs_gjournal.c at all if UFS_GJOURNAL option is not given	2009-09-22 16:22:05 +00:00
vm	Properly synchronize the previous change.	2009-11-28 00:50:09 +00:00
xdr	Add a check for a NULL mbuf ptr at the beginning of xdrmbuf_inline()	2009-08-12 16:27:51 +00:00
xen	Temporarily revert the new-bus locking for 8.0 release. It will be	2009-08-20 19:17:53 +00:00
Makefile