netdev - [PATCH bpf-next v2 11/16] selftests: xsk: decrease batch size

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Message-Id: <20210817092729.433-12-magnus.karlsson@gmail.com>
Date:   Tue, 17 Aug 2021 11:27:24 +0200
From:   Magnus Karlsson <magnus.karlsson@...il.com>
To:     magnus.karlsson@...el.com, bjorn@...nel.org, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        maciej.fijalkowski@...el.com
Cc:     jonathan.lemon@...il.com, ciara.loftus@...el.com,
        bpf@...r.kernel.org, yhs@...com, andrii@...nel.org
Subject: [PATCH bpf-next v2 11/16] selftests: xsk: decrease batch size

From: Magnus Karlsson <magnus.karlsson@...el.com>

Decrease the batch size from 64 to 8 to avoid potentially overflowing
some buffers in the skb case that leads to dropped packets we cannot
control (and thus the tests may generate false negatives).

Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
---
 tools/testing/selftests/bpf/xdpxceiver.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h
index 0fb657b505ae..1c5457e9f1d6 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.h
+++ b/tools/testing/selftests/bpf/xdpxceiver.h
@@ -36,7 +36,7 @@
 #define UDP_PKT_DATA_SIZE (UDP_PKT_SIZE - sizeof(struct udphdr))
 #define USLEEP_MAX 10000
 #define SOCK_RECONF_CTR 10
-#define BATCH_SIZE 64
+#define BATCH_SIZE 8
 #define POLL_TMOUT 1000
 #define DEFAULT_PKT_CNT (4 * 1024)
 #define RX_FULL_RXQSIZE 32
-- 
2.29.0