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Miller" , Jakub Kicinski Cc: netdev , Eric Dumazet , Eric Dumazet , Mat Martineau , Matthieu Baerts Subject: [PATCH net-next 1/2] net: snmp: inline snmp_get_cpu_field() Date: Wed, 29 Sep 2021 18:03:32 -0700 Message-Id: <20210930010333.2625706-2-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.33.0.800.g4c38ced690-goog In-Reply-To: <20210930010333.2625706-1-eric.dumazet@gmail.com> References: <20210930010333.2625706-1-eric.dumazet@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eric Dumazet This trivial function is called ~90,000 times on 256 cpus hosts, when reading /proc/net/netstat. And this number keeps inflating. Inlining it saves many cycles. Signed-off-by: Eric Dumazet --- include/net/ip.h | 6 +++++- net/ipv4/af_inet.c | 6 ------ 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/include/net/ip.h b/include/net/ip.h index 9192444f2964ebb59454a7dfa5ddf3b19dea04c9..cf229a53119428307da898af4b0dc23e1cecc053 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -291,7 +291,11 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb, #define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd) #define __NET_ADD_STATS(net, field, adnd) __SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd) -u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offct); +static inline u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) +{ + return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); +} + unsigned long snmp_fold_field(void __percpu *mib, int offt); #if BITS_PER_LONG==32 u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct, diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 40558033f857c0ca7d98b778f70487e194f3d066..967926c1bf56cfc915258b0969914b11f24c1e16 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1662,12 +1662,6 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family, } EXPORT_SYMBOL_GPL(inet_ctl_sock_create); -u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) -{ - return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); -} -EXPORT_SYMBOL_GPL(snmp_get_cpu_field); - unsigned long snmp_fold_field(void __percpu *mib, int offt) { unsigned long res = 0; -- 2.33.0.800.g4c38ced690-goog