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3cb28a5481
freebsd-skq/sys/net
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glebius 4b29d585cf The drbr(9) API appeared to be so unclear, that most drivers in 
tree used it incorrectly, which lead to inaccurate overrated
if_obytes accounting. The drbr(9) used to update ifnet stats on
drbr_enqueue(), which is not accurate since enqueuing doesn't
imply successful processing by driver. Dequeuing neither mean
that. Most drivers also called drbr_stats_update() which did
accounting again, leading to doubled if_obytes statistics. And
in case of severe transmitting, when a packet could be several
times enqueued and dequeued it could have been accounted several
times.

o Thus, make drbr(9) API thinner. Now drbr(9) merely chooses between
  ALTQ queueing or buf_ring(9) queueing.
  - It doesn't touch the buf_ring stats any more.
  - It doesn't touch ifnet stats anymore.
  - drbr_stats_update() no longer exists.

o buf_ring(9) handles its stats itself:
  - It handles br_drops itself.
  - br_prod_bytes stats are dropped. Rationale: no one ever
    reads them but update of a common counter on every packet
    negatively affects performance due to excessive cache
    invalidation.
  - buf_ring_enqueue_bytes() reduced to buf_ring_enqueue(), since
    we no longer account bytes.

o Drivers handle their stats theirselves: if_obytes, if_omcasts.

o mlx4(4), igb(4), em(4), vxge(4), oce(4) and  ixv(4) no longer
  use drbr_stats_update(), and update ifnet stats theirselves.

o bxe(4) was the most correct driver, it didn't call
  drbr_stats_update(), thus it was the only driver accurate under
  moderate load. Now it also maintains stats itself.

o ixgbe(4) had already taken stats from hardware, so just
  - drop software stats updating.
  - take multicast packet count from hardware as well.

o mxge(4) just no longer needs NO_SLOW_STATS define.

o cxgb(4), cxgbe(4) need no change, since they obtain stats
  from hardware.

Reviewed by:	jfv, gnn
2012-09-28 18:28:27 +00:00
..
bpf_buffer.c Call bpf_jitter() before acquiring BPF global lock due to malloc() being used inside bpf_jitter. 2012-05-21 22:19:19 +00:00
bpf_buffer.h Call bpf_jitter() before acquiring BPF global lock due to malloc() being used inside bpf_jitter. 2012-05-21 22:19:19 +00:00
bpf_filter.c Clear the filter memory area before using it. Leaving it uninitialized may 2011-07-14 21:06:22 +00:00
bpf_jitter.c
bpf_jitter.h
bpf_zerocopy.c After the PHYS_TO_VM_PAGE() function was de-inlined, the main reason 2012-08-05 14:11:42 +00:00
bpf_zerocopy.h - Fix trivial typo 2012-01-14 17:07:52 +00:00
bpf.c Fix typo introduced in r236559. 2012-06-09 10:04:40 +00:00
bpf.h Fix old panic when BPF consumer attaches to destroying interface. 2012-05-21 22:17:29 +00:00
bpfdesc.h Fix old panic when BPF consumer attaches to destroying interface. 2012-05-21 22:17:29 +00:00
bridgestp.c Move the interface media check to a taskqueue, some interfaces (usb) sleep 2012-04-20 10:06:28 +00:00
bridgestp.h Move the interface media check to a taskqueue, some interfaces (usb) sleep 2012-04-20 10:06:28 +00:00
ethernet.h
fddi.h
firewire.h
flowtable.c - Move jenkins.h to jenkins_hash.c 2012-09-04 12:07:33 +00:00
flowtable.h
ieee8023ad_lacp.c Turn LACP debugging from a compile time option to a sysctl, it is very handy to 2012-05-26 08:09:01 +00:00
ieee8023ad_lacp.h
if_arc.h
if_arcsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_arp.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_atm.h
if_atmsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_bridge.c - In the bridge_enqueue() do success/error accounting for 2012-09-26 20:09:48 +00:00
if_bridgevar.h
if_clone.c In ifc_alloc_unit(): 2012-08-30 12:18:45 +00:00
if_clone.h - Use generic alloc_unr(9) allocator for if_clone, instead 2011-11-28 14:44:59 +00:00
if_dead.c
if_debug.c Add infrastructure to allow all frames/packets received on an interface 2011-07-03 12:22:02 +00:00
if_disc.c
if_dl.h Use the LLINDEX macro to access the link-level I/F index. This makes 2012-05-19 02:39:43 +00:00
if_edsc.c
if_ef.c
if_enc.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_enc.h
if_epair.c In epair_clone_destroy(), when destroying the second half, we have to 2012-07-09 20:38:18 +00:00
if_ethersubr.c Introduce new link-layer PFIL hook V_link_pfil_hook. 2012-09-04 19:43:26 +00:00
if_faith.c Merge multi-FIB IPv6 support from projects/multi-fibv6/head/: 2012-02-17 02:39:58 +00:00
if_fddisubr.c Tag mbufs of all incoming frames or packets with the interface's FIB 2011-07-03 16:08:38 +00:00
if_fwsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_gif.c Hold GIF_LOCK() for almost all of gif_start(). It is required to be held 2012-06-29 15:21:34 +00:00
if_gif.h
if_gre.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_gre.h gre(4) was using a field in the softc to detect possible recursion. 2011-06-18 09:34:03 +00:00
if_iso88025subr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_lagg.c Convert lagg(4) to use if_transmit instead of if_start. 2012-09-20 10:05:10 +00:00
if_lagg.h Add the ability to set which packet layers are used for the load balance hash 2012-03-06 22:58:13 +00:00
if_llatbl.c Fix races between in_lltable_prefix_free(), lla_lookup(), 2012-08-02 13:57:49 +00:00
if_llatbl.h Fix races between in_lltable_prefix_free(), lla_lookup(), 2012-08-02 13:57:49 +00:00
if_llc.h
if_loop.c Hardcode the loopback rx/tx checkum options for IPv6 to on without 2012-07-28 20:31:39 +00:00
if_media.c
if_media.h Add media types for 40G media that might be used with FreeBSD. 2012-04-10 13:59:35 +00:00
if_mib.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_mib.h
if_pflog.h o Create directory sys/netpfil, where all packet filters should 2012-09-14 11:51:49 +00:00
if_pfsync.h o Create directory sys/netpfil, where all packet filters should 2012-09-14 11:51:49 +00:00
if_sppp.h
if_spppfr.c Remove a few bits of FreeBSD 2.x compatibility code. 2011-11-14 18:21:27 +00:00
if_spppsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_stf.c Unexpand a couple of TAILQ_FOREACH()s. 2012-08-17 16:01:24 +00:00
if_stf.h
if_tap.c Correct misspelling in debug output. 2012-09-26 01:09:19 +00:00
if_tap.h
if_tapvar.h Revert part of an earlier patch attempt that snuck in with r240938. 2012-09-25 23:41:45 +00:00
if_tun.c Remove an incorrect comment 2012-09-25 21:19:17 +00:00
if_tun.h
if_types.h A major overhaul of the CARP implementation. The ip_carp.c was started 2011-12-16 12:16:56 +00:00
if_var.h The drbr(9) API appeared to be so unclear, that most drivers in 2012-09-28 18:28:27 +00:00
if_vlan_var.h Clarify throughout the vlan(4) code the difference between a "tag" (the 2012-01-12 18:39:37 +00:00
if_vlan.c Fix a silly grammar bogon. 2012-08-21 19:07:28 +00:00
if.c Merge the projects/pf/head branch, that was worked on for last six months, 2012-09-08 06:41:54 +00:00
if.h Hold GIF_LOCK() for almost all of gif_start(). It is required to be held 2012-06-29 15:21:34 +00:00
iso88025.h
netisr_internal.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netisr.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
netisr.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netmap_user.h A bit of cleanup in the names of fields of netmap-related structures. 2012-04-13 16:03:07 +00:00
netmap.h A bit of cleanup in the names of fields of netmap-related structures. 2012-04-13 16:03:07 +00:00
pf_mtag.h o Create directory sys/netpfil, where all packet filters should 2012-09-14 11:51:49 +00:00
pfil.c
pfil.h
pfkeyv2.h
pfvar.h Utilize Jenkins hash with random seed for source nodes storage. 2012-09-20 06:52:05 +00:00
ppp_defs.h
radix_mpath.c When the RADIX_MPATH kernel option is enabled, the RADIX_MPATH code tries 2011-08-25 04:31:20 +00:00
radix_mpath.h
radix.c
radix.h Make KBI changes required for future MFCing of inpcb rtentry / llentry caching. 2011-09-20 20:27:26 +00:00
raw_cb.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
raw_cb.h Pass the fibnum where we need filtering of the message on the 2011-09-28 13:48:36 +00:00
raw_usrreq.c Pass the fibnum where we need filtering of the message on the 2011-09-28 13:48:36 +00:00
route.c Hide kernel option ROUTETABLES evaluations in the implementation 2012-03-18 11:23:40 +00:00
route.h When ip_output()/ip6_output() is supplied a struct route *ro argument, 2012-07-04 07:37:53 +00:00
rtsock.c Do not require radix write lock to be held while dumping route table 2012-04-22 16:13:23 +00:00
slcompress.c
slcompress.h
vnet.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
vnet.h
zlib.c
zlib.h Change some headers such that lang/gcc* ports no longer patch them. 2012-02-14 12:50:20 +00:00
zutil.h