Commit 95ec6696 authored Sep 20, 2017 by Joel Fernandes Committed by David S. Miller Sep 21, 2017

samples/bpf: Use getppid instead of getpgrp for array map stress



When cross-compiling the bpf sample map_perf_test for aarch64, I find that
__NR_getpgrp is undefined. This causes build errors. This syscall is deprecated
and requires defining __ARCH_WANT_SYSCALL_DEPRECATED. To avoid having to define
that, just use a different syscall (getppid) for the array map stress test.

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ae3e24fd

samples/bpf/map_perf_test_kern.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -266,7 +266,7 @@ int stress_hash_map_lookup(struct pt_regs *ctx)
		return 0;
		}

		SEC("kprobe/sys_getpgrp")
		SEC("kprobe/sys_getppid")
		int stress_array_map_lookup(struct pt_regs *ctx)
		{
		u32 key = 1, i;

samples/bpf/map_perf_test_user.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -282,7 +282,7 @@ static void test_array_lookup(int cpu)

		start_time = time_get_ns();
		for (i = 0; i < max_cnt; i++)
		syscall(__NR_getpgrp, 0);
		syscall(__NR_getppid, 0);
		printf("%d:array_lookup %lld lookups per sec\n",
		cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
		}