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Kai Shen 79a22238b4 net/smc: Use percpu ref for wr tx reference 
The refcount wr_tx_refcnt may cause cache thrashing problems among
cores and we can use percpu ref to mitigate this issue here. We
gain some performance improvement with percpu ref here on our
customized smc-r verion. Applying cache alignment may also mitigate
this problem but it seem more reasonable to use percpu ref here.
We can also replace wr_reg_refcnt with one percpu reference like
wr_tx_refcnt.

redis-benchmark on smc-r with atomic wr_tx_refcnt:
SET: 525707.06 requests per second, p50=0.087 msec
GET: 554877.38 requests per second, p50=0.087 msec

redis-benchmark on the percpu_ref version:
SET: 540482.06 requests per second, p50=0.087 msec
GET: 570711.12 requests per second, p50=0.079 msec

Cases are like "redis-benchmark -h x.x.x.x -q -t set,get -P 1 -n
5000000 -c 50 -d 10 --threads 4".

Signed-off-by: Kai Shen <KaiShen@linux.alibaba.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2023-03-17 08:59:01 +00:00
..
6lowpan
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9p 9p patches for 6.3 merge window (part 1) 2023-03-01 08:52:49 -08:00
802 treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
8021q vlan: partially enable SIOCSHWTSTAMP in container 2023-03-17 08:21:16 +00:00
appletalk
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atm net: annotate lockless accesses to sk->sk_err_soft 2023-03-17 08:25:05 +00:00
ax25
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batman-adv batman-adv: tvlv: prepare for tvlv enabled multicast packet type 2023-01-21 19:01:59 +01:00
bluetooth TTY/Serial driver updates for 6.3-rc1 2023-02-24 12:17:14 -08:00
bpf Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-03-09 22:22:11 -08:00
bpfilter
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bridge rtnetlink: bridge: mcast: Relax group address validation in common code 2023-03-17 08:05:49 +00:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-02 22:22:07 -08:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-02-09 12:25:40 -08:00
ceph Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
core rtnetlink: bridge: mcast: Relax group address validation in common code 2023-03-17 08:05:49 +00:00
dcb net: dcb: add helper functions to retrieve PCP and DSCP rewrite maps 2023-01-20 09:33:22 +00:00
dccp dccp: annotate lockless accesses to sk->sk_err_soft 2023-03-17 08:25:05 +00:00
devlink devlink: drop leftover duplicate/unused code 2023-02-20 11:38:35 +00:00
dns_resolver
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dsa net: dsa: use NL_SET_ERR_MSG_WEAK_MOD() more consistently 2023-02-03 19:23:32 -08:00
ethernet net: ethernet: use sysfs_emit() to instead of scnprintf() 2022-12-07 20:02:44 -08:00
ethtool net: ethtool: fix __ethtool_dev_mm_supported() implementation 2023-02-21 09:05:01 -08:00
hsr net: hsr: Don't log netdev_err message on unknown prp dst node 2023-03-13 16:15:58 -07:00
ieee802154 ieee802154: Prevent user from crashing the host 2023-03-02 14:39:48 +01:00
ife
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ipv4 inet_diag: constify raw_lookup() socket argument 2023-03-17 08:56:37 +00:00
ipv6 ipv6: raw: constify raw_v6_match() socket argument 2023-03-17 08:56:37 +00:00
iucv
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kcm net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
key af_key: Fix heap information leak 2023-02-13 09:30:14 +00:00
l2tp l2tp: Avoid possible recursive deadlock in l2tp_tunnel_register() 2023-02-20 09:25:20 +00:00
l3mdev
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lapb
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llc
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mac80211 wifi: mac80211: add LDPC related flags in ieee80211_bss_conf 2023-03-07 11:06:29 +01:00
mac802154 Merge tag 'ieee802154-for-net-next-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next 2023-02-20 16:40:52 -08:00
mctp mctp: remove MODULE_LICENSE in non-modules 2023-03-09 23:06:21 -08:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-15 10:26:37 +00:00
mptcp inet: preserve const qualifier in inet_sk() 2023-03-17 08:56:37 +00:00
ncsi net/ncsi: Silence runtime memcpy() false positive warning 2022-12-06 17:29:14 -08:00
netfilter Merge branch 'main' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next 2023-03-09 23:28:53 -08:00
netlabel
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netlink netlink: remove unused 'compare' function 2023-03-09 23:11:09 -08:00
netrom netrom: Fix use-after-free caused by accept on already connected socket 2023-01-30 07:30:47 +00:00
nfc nfc: change order inside nfc_se_io error path 2023-03-07 13:37:05 -08:00
nsh
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openvswitch There is no particular theme here - mainly quick hits all over the tree. 2023-02-23 17:55:40 -08:00
packet net/packet: convert po->pressure to an atomic flag 2023-03-17 08:52:06 +00:00
phonet net/sock: Introduce trace_sk_data_ready() 2023-01-23 11:26:50 +00:00
psample
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qrtr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-02-02 14:49:55 -08:00
rds rds: rds_rm_zerocopy_callback() correct order for list_add_tail() 2023-02-13 09:33:39 +00:00
rfkill rfkill: Use sysfs_emit() to instead of sprintf() 2023-02-14 12:21:14 +01:00
rose net/rose: Fix to not accept on connected socket 2023-01-28 00:19:57 -08:00
rxrpc Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
sched net: sched: remove qdisc_watchdog->last_expires 2023-03-09 23:24:14 -08:00
sctp net: annotate lockless accesses to sk->sk_err_soft 2023-03-17 08:25:05 +00:00
smc net/smc: Use percpu ref for wr tx reference 2023-03-17 08:59:01 +00:00
strparser
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sunrpc nfsd-6.3 fixes: 2023-03-01 11:03:44 -08:00
switchdev
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tipc Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
tls net: tls: fix device-offloaded sendpage straddling records 2023-03-06 13:26:16 -08:00
unix af_unix: annotate lockless accesses to sk->sk_err 2023-03-17 08:25:05 +00:00
vmw_vsock Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
wireless wireless-next patches for 6.4 2023-03-10 18:22:29 -08:00
x25 net/x25: Fix to not accept on connected socket 2023-01-25 09:51:04 +00:00
xdp bpf, net: xskmap memory usage 2023-03-07 09:33:43 -08:00
xfrm bpf-next-for-netdev 2023-02-10 17:51:27 -08:00
Kconfig
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Kconfig.debug
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Makefile devlink: move code to a dedicated directory 2023-01-05 22:12:00 -08:00
compat.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
devres.c
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socket.c net: socket: suppress unused warning 2023-03-13 15:59:20 -07:00
sysctl_net.c
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