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freebsd-dev/sys/compat/linux
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Matt Macy d7c5a620e2 ifnet: Replace if_addr_lock rwlock with epoch + mutex 
Run on LLNW canaries and tested by pho@

gallatin:
Using a 14-core, 28-HTT single socket E5-2697 v3 with a 40GbE MLX5
based ConnectX 4-LX NIC, I see an almost 12% improvement in received
packet rate, and a larger improvement in bytes delivered all the way
to userspace.

When the host receiving 64 streams of netperf -H $DUT -t UDP_STREAM -- -m 1,
I see, using nstat -I mce0 1 before the patch:

InMpps OMpps  InGbs  OGbs err TCP Est %CPU syscalls csw     irq GBfree
4.98   0.00   4.42   0.00 4235592     33   83.80 4720653 2149771   1235 247.32
4.73   0.00   4.20   0.00 4025260     33   82.99 4724900 2139833   1204 247.32
4.72   0.00   4.20   0.00 4035252     33   82.14 4719162 2132023   1264 247.32
4.71   0.00   4.21   0.00 4073206     33   83.68 4744973 2123317   1347 247.32
4.72   0.00   4.21   0.00 4061118     33   80.82 4713615 2188091   1490 247.32
4.72   0.00   4.21   0.00 4051675     33   85.29 4727399 2109011   1205 247.32
4.73   0.00   4.21   0.00 4039056     33   84.65 4724735 2102603   1053 247.32

After the patch

InMpps OMpps  InGbs  OGbs err TCP Est %CPU syscalls csw     irq GBfree
5.43   0.00   4.20   0.00 3313143     33   84.96 5434214 1900162   2656 245.51
5.43   0.00   4.20   0.00 3308527     33   85.24 5439695 1809382   2521 245.51
5.42   0.00   4.19   0.00 3316778     33   87.54 5416028 1805835   2256 245.51
5.42   0.00   4.19   0.00 3317673     33   90.44 5426044 1763056   2332 245.51
5.42   0.00   4.19   0.00 3314839     33   88.11 5435732 1792218   2499 245.52
5.44   0.00   4.19   0.00 3293228     33   91.84 5426301 1668597   2121 245.52

Similarly, netperf reports 230Mb/s before the patch, and 270Mb/s after the patch

Reviewed by:	gallatin
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D15366
2018-05-18 20:13:34 +00:00
..
check_error.d Switch linuxulator to use the native 1:1 threads. 2015-05-24 14:53:16 +00:00
check_internal_locks.d Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_common.c Move FEATURE macros for v4l and v4l2 to the common module. 2015-05-24 16:00:01 +00:00
linux_dtrace.h sys/compat: further adoption of SPDX licensing ID tags. 2017-11-27 15:13:23 +00:00
linux_emul.c linuxulator: deduplicate linux_exec_imgact_try 2018-04-09 17:24:01 +00:00
linux_emul.h linuxulator: deduplicate linux_exec_imgact_try 2018-04-09 17:24:01 +00:00
linux_errno.c Share Linux errno table with libsysdecode 2018-03-22 12:58:49 +00:00
linux_errno.inc Map FreeBSD EDOOFUS to Linux EINVAL 2018-04-23 18:33:26 +00:00
linux_event.c Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
linux_event.h Implement timerfd family syscalls. 2017-02-26 09:48:18 +00:00
linux_file.c Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
linux_file.h Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_fork.c Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_futex.c Fix futexes on i386 after the 4/4G split. 2018-04-24 12:50:21 +00:00
linux_futex.h Fix futexes on i386 after the 4/4G split. 2018-04-24 12:50:21 +00:00
linux_getcwd.c sys/compat: further adoption of SPDX licensing ID tags. 2017-11-27 15:13:23 +00:00
linux_ioctl.c ifnet: Replace if_addr_lock rwlock with epoch + mutex 2018-05-18 20:13:34 +00:00
linux_ioctl.h Rationalize license text on Linuxolator files 2018-03-23 14:39:34 +00:00
linux_ipc64.h Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_ipc.c sys/linux: Fix a few potential infoleaks in Linux IPC 2018-03-03 21:14:55 +00:00
linux_ipc.h Rationalize license text on Linuxolator files 2018-03-23 14:39:34 +00:00
linux_mib.c Correct proper nouns in the Linuxulator 2018-02-22 02:24:17 +00:00
linux_mib.h Rationalize license text on Linuxolator files 2018-03-23 14:39:34 +00:00
linux_misc.c Correct proper nouns in the Linuxulator 2018-02-22 02:24:17 +00:00
linux_misc.h Rationalize license text on Linuxolator files 2018-03-23 14:39:34 +00:00
linux_mmap.c Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
linux_mmap.h Fix a copy/paste bug introduced during X86_64 Linuxulator work. 2016-07-10 08:22:04 +00:00
linux_persona.h Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_signal.c Linuxulator: apply style(9) to return 2018-03-12 15:35:24 +00:00
linux_signal.h Rationalize license text on Linuxolator files 2018-03-23 14:39:34 +00:00
linux_socket.c Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
linux_socket.h Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_stats.c Eliminate the overhead of gratuitous repeated reinitialization of cap_rights 2018-05-09 18:47:24 +00:00
linux_sysctl.c Rationalize license text on Linuxolator files 2018-02-16 15:00:14 +00:00
linux_sysproto.h sys/compat: further adoption of SPDX licensing ID tags. 2017-11-27 15:13:23 +00:00
linux_time.c Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_timer.c Return EINVAL in case of incorrect sigev_signo value specified instead of panicing. 2015-12-26 09:09:49 +00:00
linux_timer.h Use the kern_clock_nanosleep() to implement Linux clock_nanosleep() with 2017-04-02 18:16:00 +00:00
linux_uid16.c sys/compat: further adoption of SPDX licensing ID tags. 2017-11-27 15:13:23 +00:00
linux_util.c Move most of the contents of opt_compat.h to opt_global.h. 2018-04-06 17:35:35 +00:00
linux_util.h Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
linux_vdso.c Avoid using [LINUX_]SHAREDPAGE constant directly in the vdso code. 2017-07-30 21:24:20 +00:00
linux_vdso.h Avoid using [LINUX_]SHAREDPAGE constant directly in the vdso code. 2017-07-30 21:24:20 +00:00
linux_videodev2_compat.h
linux_videodev_compat.h
linux.c Improve debugging output. 2017-02-16 10:36:00 +00:00
linux.h Rework signal code to allow using it by other modules, like linprocfs: 2015-05-24 17:47:20 +00:00
stats_timing.d Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00
trace_futexes.d Linuxolator whitespace cleanup 2018-02-05 17:29:12 +00:00