use batch size 3

Makefile

 BENCH_MAIN := bench.c
 SYSCALLS := blocking epoll \
             paio_sig paio_thrd linux_aio \
-            io_uring io_uring_batch io_uring_sqpoll io_uring_no_syscall 
+            io_uring io_uring_batch3 io_uring_sqpoll io_uring_no_syscall 
 
 OBJ := $(addprefix bench-,$(SYSCALLS))
 

io_uring_batch.c → io_uring_batch3.c

@@ -7,7 +7,7 @@
 
 struct io_uring ring;
 
-static const unsigned BATCH_SIZE = 10;
+static const unsigned BATCH_SIZE = 3;
 
 void init(__attribute__((unused)) int fd) {
 	int res = io_uring_queue_init(BATCH_SIZE, &ring, 0);