don't pin our thread

Makefile

@@ -5,7 +5,7 @@ OBJ := $(addprefix bench-,$(SYSCALLS))
 
 LDFLAGS := -luring -pthread -lrt
 
-CFLAGS := -Werror -Wall -g -O3 -D_GNU_SOURCE
+CFLAGS := -Werror -Wall -g -O3
 # CFLAGS := -Werror -Wall -g -O0
 
 .PHONY: all clean eval docker-eval check

bench.c

 #include <err.h>
 #include <fcntl.h>
-#include <sched.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/eventfd.h>
-#include <unistd.h>
 
 #include "stopwatch.h"
 
@@ -25,22 +23,11 @@ static int create_eventfd() {
 	return fd;
 }
 
-static void set_cpu_affinity(int cpu) {
-	cpu_set_t set;
-	// NOLINTNEXTLINE(clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling)
-	CPU_ZERO(&set);
-	CPU_SET(cpu, &set);
-	if (sched_setaffinity(getpid(), sizeof(set), &set) == -1)
-		err(EXIT_FAILURE, "sched_setaffinity failed");
-}
-
 int main() {
 	uint64_t cycles_sum = 0;
 	uint64_t nanos_sum = 0;
 	uint64_t write_buf = 1;
 
-	set_cpu_affinity(0);
-
 	int fd = create_eventfd();
 
 	init(fd);