Added matching of CPU to a socket CPU mask. This is useful for TCP
listeners and unconnected UDP. This works with SO_REUSPORT to steer
packets to listener sockets based on CPU affinity. These patches
allow steering packets to listeners based on numa locality. This is
only useful for passive connections.
v2:
- Add cache alignment for fields used in socket lookup in sock_common
- Added UDP test results
Tested: 200 TCP_RR with --r 512,512 streams ran against an echo server
with that sets both SO_REUSEPORT and SO_INCOMING_CPU_MASK. In the
test case used taskset to pin an instance to a set of CPUs corresponding
to a numa node and set SO_INCOMING_CPU_MASK to the same set of CPUS.
CPU utilization is reported from the echo server side.
IPv4
No INCOMING_CPU_MASK
83.48% CPU utilization
1627173 tps
106/185/382 50/90/99% latencies
With INCOMING_CPU_MASK
77.61% CPU utilization
1669853 tps
103/181/378 50/90/99% latencies
IPv6
No INCOMING_CPU_MASK
84.82% CPU utilization
1551730 tps
111/195/392 50/90/99% latencies
With INCOMING_CPU_MASK
79.25% CPU utilization
1571911 tps
110/191/381 50/90/99% latencies
Tested: 200 UDP_RR with --r 512,512 streams ran against an echo server
with that sets both SO_REUSEPORT and SO_INCOMING_CPU_MASK. In the
test case used taskset to pin an instance to a set of CPUs corresponding
to a numa node and set SO_INCOMING_CPU_MASK to the same set of CPUS.
IPv4
No INCOMING_CPU_MASK
54.76% CPU utilization
1603752.3 tps
95/217/753 50/90/99% latencies
With INCOMING_CPU_MASK
53.25% CPU utilization
1717618 tps
117/221/502 50/90/99% latencies
IPv6
No INCOMING_CPU_MASK
61.62% CPU utilization
1276757 tps
125/279/629 50/90/99% latencies
With INCOMING_CPU_MASK
66.63% CPU utilization
1314527 tps
149/318/564 50/90/99% latencies
*** BLURB HERE ***
Tom Herbert (3):
net: Add cache alignment in sock_common for socket lookup fields
kernel: Make compat bitmap functions externally visible
net: Add incoming CPU mask to sockets
arch/alpha/include/uapi/asm/socket.h | 2 +
arch/avr32/include/uapi/asm/socket.h | 2 +
arch/cris/include/uapi/asm/socket.h | 2 +
arch/frv/include/uapi/asm/socket.h | 2 +
arch/ia64/include/uapi/asm/socket.h | 2 +
arch/m32r/include/uapi/asm/socket.h | 2 +
arch/mips/include/uapi/asm/socket.h | 2 +
arch/mn10300/include/uapi/asm/socket.h | 2 +
arch/parisc/include/uapi/asm/socket.h | 2 +
arch/powerpc/include/uapi/asm/socket.h | 2 +
arch/s390/include/uapi/asm/socket.h | 2 +
arch/sparc/include/uapi/asm/socket.h | 2 +
arch/xtensa/include/uapi/asm/socket.h | 2 +
include/linux/compat.h | 2 +
include/net/sock.h | 39 ++++++++++++++++-
include/uapi/asm-generic/socket.h | 2 +
kernel/compat.c | 7 ++-
net/compat.c | 56 ++++++++++++++++++++++++
net/core/sock.c | 80 ++++++++++++++++++++++++++++++++++
net/ipv4/inet_hashtables.c | 3 ++
net/ipv4/udp.c | 6 +++
net/ipv6/inet6_hashtables.c | 3 ++
net/ipv6/udp.c | 3 ++
23 files changed, 224 insertions(+), 3 deletions(-)
--
1.8.1
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