Skip to content

affinity in Ringbuffer Benchmark #11

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
raphael-s-steiner merged 2 commits into from
Mar 31, 2026
Merged

affinity in Ringbuffer Benchmark #11

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5fedbc8
affinity in Ringbuffer Benchmark
raphael-s-steiner Mar 31, 2026
8086d86
corrected error messages
raphael-s-steiner Mar 31, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
71 changes: 71 additions & 0 deletions benchmarks/RingBuffer.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,9 @@ limitations under the License.
#include "RingBuffer/RingBuffer.hpp"

#include <benchmark/benchmark.h>
#include <pthread.h>

#include <iostream>

using namespace spapq;

Expand Down Expand Up @@ -101,8 +104,42 @@ static void BM_RingBuffer_2Threads_optional(benchmark::State &state) {

RingBuffer<std::size_t, capacity> chan_opt;
if (producer) {
pthread_t self = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
const std::size_t logicalCore = 0U;
CPU_SET(logicalCore, &cpuset);

int rc = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
if (rc != 0) {
const std::string errorMessage = "Call to pthread_setaffinity_np returned error "
+ std::to_string(rc)
+ ".\nFailed to pin producer's thread to logical core "
+ std::to_string(logicalCore)
+ ".\n";
std::cerr << errorMessage;
std::exit(EXIT_FAILURE);
}

start_optional.wait(false, std::memory_order_acquire);
} else {
pthread_t self = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
const std::size_t logicalCore = 1U;
CPU_SET(logicalCore, &cpuset);

int rc = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
if (rc != 0) {
const std::string errorMessage = "Call to pthread_setaffinity_np returned error "
+ std::to_string(rc)
+ ".\nFailed to pin consumer's thread to logical core "
+ std::to_string(logicalCore)
+ ".\n";
std::cerr << errorMessage;
std::exit(EXIT_FAILURE);
}

channel_optional = &chan_opt;
start_optional.test_and_set(std::memory_order_release);
start_optional.notify_all();
Expand Down Expand Up @@ -150,8 +187,42 @@ static void BM_RingBuffer_2Threads_reference(benchmark::State &state) {

RingBuffer<std::size_t, capacity> chan_opt;
if (producer) {
pthread_t self = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
const std::size_t logicalCore = 0U;
CPU_SET(logicalCore, &cpuset);

int rc = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
if (rc != 0) {
const std::string errorMessage = "Call to pthread_setaffinity_np returned error "
+ std::to_string(rc)
+ ".\nFailed to pin producer's thread to logical core "
+ std::to_string(logicalCore)
+ ".\n";
std::cerr << errorMessage;
std::exit(EXIT_FAILURE);
}

start_reference.wait(false, std::memory_order_acquire);
} else {
pthread_t self = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
const std::size_t logicalCore = 1U;
CPU_SET(logicalCore, &cpuset);

int rc = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
if (rc != 0) {
const std::string errorMessage = "Call to pthread_setaffinity_np returned error "
+ std::to_string(rc)
+ ".\nFailed to pin consumer's thread to logical core "
+ std::to_string(logicalCore)
+ ".\n";
std::cerr << errorMessage;
std::exit(EXIT_FAILURE);
}

channel_reference = &chan_opt;
start_reference.test_and_set(std::memory_order_release);
start_reference.notify_all();
Expand Down