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fe51d4cdfe
freebsd-dev/sys
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Stephen Hurd fe51d4cdfe Add knob to control tx ring abdication. 
r323954 changed the mp ring behaviour when 64-bit atomics were
available to abdicate the TX ring rather than having one become a
consumer thereby running to completion on TX. The consumer of the mp
ring was then triggered in the tx task rather than blocking the TX call.
While this significantly lowered the number of RX drops in small-packet
forwarding, it also negatively impacts TX performance.

With this change, the default behaviour is reverted, causing one TX ring
to become a consumer during the enqueue call. A new sysctl,
dev.X.Y.iflib.tx_abdicate is added to control this behaviour.

Reviewed by:	gallatin
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D16302
2018-07-20 17:45:26 +00:00
..
amd64 Have preload_delete_name() free pages backing preloaded data. 2018-07-19 20:00:28 +00:00
arm arm: Implement cpu_est_clockrate for armv[67] 2018-07-19 11:27:11 +00:00
arm64 Add support for pmap_enter(psind = 1) to the arm64 pmap. 2018-07-20 16:37:04 +00:00
bsm
cam remove unneeded inclusion of sys/interrupt.h from several files 2018-07-04 09:07:18 +00:00
cddl Fix a couple of typos in r334844 noticed by Richard Kojedzinszky. 2018-07-18 16:03:40 +00:00
compat Regen after r336171. 2018-07-10 14:04:52 +00:00
conf Make it possible to run ntpd as a non-root user, add ntpd uid and gid. 2018-07-19 23:55:29 +00:00
contrib Correct the identifier for the Unifi Security Gateway 2018-07-10 17:01:19 +00:00
crypto libmd: Always erase context in _Final method, and when doing 2018-07-20 07:01:28 +00:00
ddb Extend show proc with reaper, sigparent, and vmspace information 2018-05-25 13:59:48 +00:00
dev vt/ofwfb: Fix brain-o from r336514, use the correct form of /chosen/stdout-path 2018-07-20 16:18:24 +00:00
dts Add spi-max-frequency properties to all spigen nodes. This is a required 2018-06-23 22:55:22 +00:00
fs Modify the reasons for not issuing a delegation in the NFSv4.1 server. 2018-07-16 21:32:50 +00:00
gdb amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
geom OpenCrypto: Convert sessions to opaque handles instead of integers 2018-07-18 00:56:25 +00:00
gnu dts: Update our copy to Linux 4.17 2018-06-14 07:12:10 +00:00
i386 Annotate a parameter as unused. 2018-07-20 16:31:25 +00:00
isa Revert r330780, it was improperly tested and results in taking a spin 2018-03-11 20:13:15 +00:00
kern Raise the size of L3 table for early devmap on arm64 2018-07-19 21:58:06 +00:00
kgssapi OpenCrypto: Convert sessions to opaque handles instead of integers 2018-07-18 00:56:25 +00:00
libkern Sync strlcpy with userland version, again 2018-06-21 17:35:13 +00:00
mips OpenCrypto: Convert sessions to opaque handles instead of integers 2018-07-18 00:56:25 +00:00
modules Make it possible to run ntpd as a non-root user, add ntpd uid and gid. 2018-07-19 23:55:29 +00:00
net Add knob to control tx ring abdication. 2018-07-20 17:45:26 +00:00
net80211 net80211: Fix ifdetach w/o ifattach, small whitespace cleanup 2018-07-10 23:30:19 +00:00
netgraph Catch up two more places to the V_ifnet change to a CK_STAILQ. 2018-05-24 00:06:55 +00:00
netinet Add missing dtrace probes for received UDP packets. 2018-07-20 15:32:20 +00:00
netinet6 Add missing dtrace probes for received UDP packets. 2018-07-20 15:32:20 +00:00
netipsec OpenCrypto: Convert sessions to opaque handles instead of integers 2018-07-18 00:56:25 +00:00
netpfil pf: Fix synproxy 2018-07-14 10:14:59 +00:00
netsmb Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
nfs Switch RIB and RADIX_NODE_HEAD lock from rwlock(9) to rmlock(9). 2018-06-16 08:26:23 +00:00
nfsclient
nfsserver
nlm
ofed Use __FBSDID() for RCS tags in ibcore. 2018-07-17 09:47:14 +00:00
opencrypto OpenCrypto: Convert sessions to opaque handles instead of integers 2018-07-18 00:56:25 +00:00
powerpc Revert r336509. Fails buildworld. 2018-07-19 21:06:58 +00:00
riscv Remove VM_FREELIST_ISADMA. It's not needed on these architectures. 2018-07-17 21:07:53 +00:00
rpc Set SO_SNDTIMEO in the client side krpc when CLSET_TIMEOUT is done. 2018-07-20 12:03:16 +00:00
security Make it possible to run ntpd as a non-root user, add ntpd uid and gid. 2018-07-19 23:55:29 +00:00
sparc64 Fix a typo: change lists to list to match rest of sentence. 2018-07-17 21:18:49 +00:00
sys Bump version to 1200075 for zfsloader being folded into loader. 2018-07-20 05:34:02 +00:00
teken teken: Fix sequences header which was crossing the 80-col boundary 2018-05-29 08:41:44 +00:00
tests epoch_test: fix compile 2018-07-15 00:31:17 +00:00
tools Add dtb overlays support 2018-03-24 21:30:24 +00:00
ufs Add needed locking for um_flags added in -r335808. 2018-07-17 04:43:58 +00:00
vm Add support for pmap_enter(psind = 1) to the arm64 pmap. 2018-07-20 16:37:04 +00:00
x86 xen: implement early init helper for PVHv2 2018-07-19 08:44:52 +00:00
xdr
xen xen: add missing file from r336474 2018-07-19 10:14:52 +00:00
Makefile