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7cb31c46b9
linux/net
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Pavel Begunkov 7cb31c46b9 net: cache for same cpu skb_attempt_defer_free 
Optimise skb_attempt_defer_free() when run by the same CPU the skb was
allocated on. Instead of __kfree_skb() -> kmem_cache_free() we can
disable softirqs and put the buffer into cpu local caches.

CPU bound TCP ping pong style benchmarking (i.e. netbench) showed a 1%
throughput increase (392.2 -> 396.4 Krps). Cross checking with profiles,
the total CPU share of skb_attempt_defer_free() dropped by 0.6%. Note,
I'd expect the win doubled with rx only benchmarks, as the optimisation
is for the receive path, but the test spends >55% of CPU doing writes.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/a887463fb219d973ec5ad275e31194812571f1f5.1712711977.git.asml.silence@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-04-10 19:27:32 -07:00
..
6lowpan net: fill in MODULE_DESCRIPTION()s for 6LoWPAN 2024-02-09 14:12:01 -08:00
9p
802
8021q netlink: introduce type-checking attribute iteration 2024-03-29 15:06:02 -07:00
appletalk
atm ipv4: Set scope explicitly in ip_route_output(). 2024-04-08 13:20:51 +01:00
ax25 net: handle HAS_IOPORT dependencies 2024-04-08 11:56:56 +01:00
batman-adv This cleanup patchset includes the following patches: 2024-04-08 11:37:27 +01:00
bluetooth Bluetooth: Fix TOCTOU in HCI debugfs implementation 2024-03-29 09:48:37 -04:00
bpf bpf: Check return from set_memory_rox() 2024-03-18 14:18:47 -07:00
bridge ipv4: Set scope explicitly in ip_route_output(). 2024-04-08 13:20:51 +01:00
caif caif: Use UTILITY_NAME_LENGTH instead of hard-coding 16 2024-04-02 18:20:00 -07:00
can linux-can-next-for-6.9-20240220 2024-02-20 15:32:45 +01:00
ceph libceph: init the cursor when preparing sparse read in msgr2 2024-03-06 12:43:01 +01:00
core net: cache for same cpu skb_attempt_defer_free 2024-04-10 19:27:32 -07:00
dcb
dccp tcp/dccp: do not care about families in inet_twsk_purge() 2024-04-01 21:27:58 -07:00
devlink devlink: Support setting max_io_eqs 2024-04-08 14:10:45 +01:00
dns_resolver
dsa net: dsa: Leverage core stats allocator 2024-03-07 20:37:13 -08:00
ethernet
ethtool net: ethtool: Allow passing a phy index for some commands 2024-04-06 18:25:14 +01:00
handshake net/handshake: Fix handshake_req_destroy_test1 2024-02-08 18:32:29 -08:00
hsr net: hsr: Use full string description when opening HSR network device 2024-03-29 10:42:21 +00:00
ieee802154 Merge tag 'ieee802154-for-net-next-2024-03-07' of git://git.kernel.org/pub/scm/linux/kernel/git/wpan/wpan-next 2024-03-08 20:35:33 -08:00
ife
ipv4 tcp: tweak tcp_sock_write_txrx size assertion 2024-04-10 18:55:05 -07:00
ipv6 net: make napi_frag_unref reuse skb_page_unref 2024-04-09 18:20:29 -07:00
iucv net/iucv: Avoid explicit cpumask var allocation on stack 2024-04-02 18:19:09 -07:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-11 09:53:22 +00:00
key net: fill in MODULE_DESCRIPTION()s for af_key 2024-02-09 14:12:01 -08:00
l2tp l2tp: fix incorrect parameter validation in the pppol2tp_getsockopt() function 2024-03-11 09:53:22 +00:00
l3mdev
lapb
llc
mac80211 wireless-next patches for v6.10 2024-04-03 19:36:57 -07:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-03-06 21:01:26 +01:00
mctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
mpls ipv4: Set scope explicitly in ip_route_output(). 2024-04-08 13:20:51 +01:00
mptcp tcp: propagate tcp_tw_isn via an extra parameter to ->route_req() 2024-04-09 11:47:40 +02:00
ncsi
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-04-04 18:01:07 -07:00
netlabel netlabel: remove impossible return value in netlbl_bitmap_walk 2024-02-28 19:37:34 -08:00
netlink netlink: create a new header for internal genetlink symbols 2024-04-01 21:44:34 -07:00
netrom netrom: Fix data-races around sysctl_net_busy_read 2024-03-07 10:36:58 +01:00
nfc nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet 2024-03-22 09:41:39 +00:00
nsh
openvswitch genetlink: remove linux/genetlink.h 2024-04-01 21:44:34 -07:00
packet af_packet: avoid a false positive warning in packet_setsockopt() 2024-04-08 13:19:01 +01:00
phonet phonet/pep: fix racy skb_queue_empty() use 2024-02-22 09:05:50 +01:00
psample ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
qrtr
rds net/rds: fix possible cp null dereference 2024-03-29 12:04:09 -07:00
rfkill net: rfkill: gpio: Convert to platform remove callback returning void 2024-03-25 15:40:22 +01:00
rose
rxrpc net: add sk_wake_async_rcu() helper 2024-03-29 15:03:11 -07:00
sched net: sched: cls_api: fix slab-use-after-free in fl_dump_key 2024-04-10 08:28:26 +01:00
sctp net: add sk_wake_async_rcu() helper 2024-03-29 15:03:11 -07:00
smc net/smc: Avoid -Wflex-array-member-not-at-end warnings 2024-04-03 11:01:30 +01:00
strparser
sunrpc nfsd-6.9 fixes: 2024-03-28 14:35:32 -07:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-02-16 09:36:37 +00:00
tipc tipc: Cleanup tipc_nl_bearer_add() error paths 2024-02-15 13:18:19 +01:00
tls net: skbuff: generalize the skb->decrypted bit 2024-04-06 17:34:31 +01:00
unix af_unix: Remove lock dance in unix_peek_fds(). 2024-04-03 19:27:13 -07:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-02 18:00:24 -07:00
wireless wireless-next patches for v6.10 2024-04-03 19:36:57 -07:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-11 09:53:22 +00:00
xdp bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
xfrm xfrm: Allow UDP encapsulation only in offload modes 2024-03-18 11:56:11 +01:00
compat.c
devres.c
Kconfig net: skbuff: generalize the skb->decrypted bit 2024-04-06 17:34:31 +01:00
Kconfig.debug
Makefile
socket.c net: remove {revc,send}msg_copy_msghdr() from exports 2024-03-14 16:48:53 -07:00
sysctl_net.c