app/testpmd: fix stdout flush after printing stats

User can specify stats period(n). The statistics should be available
to user every n second. But the print_stats() function does not
force stdout to be flushed, so for instance, a user reading testpmd's
stdout through pipe will not be able to read it until the stdout
buffer is filled.

Fixes: cfea1f3048d1 ("app/testpmd: print statistics periodically")
Cc: stable@dpdk.org
Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index d9d0c16..216be47 100644 (file)
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -3046,6 +3046,8 @@ print_stats(void)
        printf("\nPort statistics ====================================");
        for (i = 0; i < cur_fwd_config.nb_fwd_ports; i++)
                nic_stats_display(fwd_ports_ids[i]);
+
+       fflush(stdout);
 }
 
 static void