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| author | Gaetan Rivet <grive@u256.net> | 2021-09-08 11:47:36 +0200 |
|---|---|---|
| committer | Ilya Maximets <i.maximets@ovn.org> | 2022-01-18 19:30:17 +0100 |
| commit | 5396ba5b21c4eae9726f4726786e53d317ccfdce (patch) | |
| tree | 0d87b2097681f1fc0ce2b70d897cff2ea578b43b /tests/automake.mk | |
| parent | 5878b9252209528d04c481c425f4bd41ab7943b6 (diff) | |
| download | openvswitch-5396ba5b21c4eae9726f4726786e53d317ccfdce.tar.gz | |
mpsc-queue: Module for lock-free message passing.
Add a lockless multi-producer/single-consumer (MPSC), linked-list based,
intrusive, unbounded queue that does not require deferred memory
management.
The queue is designed to improve the specific MPSC setup. A benchmark
accompanies the unit tests to measure the difference in this configuration.
A single reader thread polls the queue while N writers enqueue elements
as fast as possible. The mpsc-queue is compared against the regular ovs-list
as well as the guarded list. The latter usually offers a slight improvement
by batching the element removal, however the mpsc-queue is faster.
The average is of each producer threads time:
$ ./tests/ovstest test-mpsc-queue benchmark 3000000 1
Benchmarking n=3000000 on 1 + 1 threads.
type\thread: Reader 1 Avg
mpsc-queue: 167 167 167 ms
list(spin): 89 80 80 ms
list(mutex): 745 745 745 ms
guarded list: 788 788 788 ms
$ ./tests/ovstest test-mpsc-queue benchmark 3000000 2
Benchmarking n=3000000 on 1 + 2 threads.
type\thread: Reader 1 2 Avg
mpsc-queue: 98 97 94 95 ms
list(spin): 185 171 173 172 ms
list(mutex): 203 199 203 201 ms
guarded list: 269 269 188 228 ms
$ ./tests/ovstest test-mpsc-queue benchmark 3000000 3
Benchmarking n=3000000 on 1 + 3 threads.
type\thread: Reader 1 2 3 Avg
mpsc-queue: 76 76 65 76 72 ms
list(spin): 246 110 240 238 196 ms
list(mutex): 542 541 541 539 540 ms
guarded list: 535 535 507 511 517 ms
$ ./tests/ovstest test-mpsc-queue benchmark 3000000 4
Benchmarking n=3000000 on 1 + 4 threads.
type\thread: Reader 1 2 3 4 Avg
mpsc-queue: 73 68 68 68 68 68 ms
list(spin): 294 275 279 277 282 278 ms
list(mutex): 346 309 287 345 302 310 ms
guarded list: 378 319 334 378 351 345 ms
Signed-off-by: Gaetan Rivet <grive@u256.net>
Reviewed-by: Eli Britstein <elibr@nvidia.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Diffstat (limited to 'tests/automake.mk')
| -rw-r--r-- | tests/automake.mk | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/automake.mk b/tests/automake.mk index 977779765..8fdec27ef 100644 --- a/tests/automake.mk +++ b/tests/automake.mk @@ -472,6 +472,7 @@ tests_ovstest_SOURCES = \ tests/test-list.c \ tests/test-lockfile.c \ tests/test-multipath.c \ + tests/test-mpsc-queue.c \ tests/test-netflow.c \ tests/test-odp.c \ tests/test-ofpbuf.c \ |