selftests/bpf: Adding delay in socketmap_listen to reduce flakyness

This patch adds a 1ms delay to reduce flakyness of the test.

Signed-off-by: Yucong Sun <fallentree@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210819163609.2583758-1-fallentree@fb.com

diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
index afa14fb..6a5df28 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
@@ -1603,8 +1603,10 @@ static void unix_redir_to_connected(int sotype, int sock_mapfd,
 again:
        n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
        if (n < 0) {
-               if (errno == EAGAIN && retries--)
+               if (errno == EAGAIN && retries--) {
+                       usleep(1000);
                        goto again;
+               }
                FAIL_ERRNO("%s: read", log_prefix);
        }
        if (n == 0)
@@ -1776,8 +1778,10 @@ static void udp_redir_to_connected(int family, int sock_mapfd, int verd_mapfd,
 again:
        n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
        if (n < 0) {
-               if (errno == EAGAIN && retries--)
+               if (errno == EAGAIN && retries--) {
+                       usleep(1000);
                        goto again;
+               }
                FAIL_ERRNO("%s: read", log_prefix);
        }
        if (n == 0)
@@ -1869,8 +1873,10 @@ static void inet_unix_redir_to_connected(int family, int type, int sock_mapfd,
 again:
        n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
        if (n < 0) {
-               if (errno == EAGAIN && retries--)
+               if (errno == EAGAIN && retries--) {
+                       usleep(1000);
                        goto again;
+               }
                FAIL_ERRNO("%s: read", log_prefix);
        }
        if (n == 0)