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Message-Id: <20240315140726.22291-7-tushar.vyavahare@intel.com>
Date: Fri, 15 Mar 2024 14:07:26 +0000
From: Tushar Vyavahare <tushar.vyavahare@...el.com>
To: bpf@...r.kernel.org
Cc: netdev@...r.kernel.org,
bjorn@...nel.org,
magnus.karlsson@...el.com,
maciej.fijalkowski@...el.com,
jonathan.lemon@...il.com,
davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
ast@...nel.org,
daniel@...earbox.net,
tirthendu.sarkar@...el.com,
tushar.vyavahare@...el.com
Subject: [PATCH bpf-next 6/6] selftests/xsk: enhance framework with a new test case for AF_XDP under max ring sizes
Introduce a test case to evaluate AF_XDP's robustness by pushing hardware
and software ring sizes to their limits. This test ensures AF_XDP's
reliability amidst potential producer/consumer throttling due to maximum
ring utilization. The testing strategy includes:
1. Configuring rings to their maximum allowable sizes.
2. Executing a series of tests across diverse batch sizes to assess system
performance under varying load conditions.
Signed-off-by: Tushar Vyavahare <tushar.vyavahare@...el.com>
---
tools/testing/selftests/bpf/xskxceiver.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 5326ca5c458c..f545b529e404 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -2480,6 +2480,26 @@ static int testapp_hw_sw_min_ring_size(struct test_spec *test)
return testapp_validate_traffic(test);
}
+static int testapp_hw_sw_max_ring_size(struct test_spec *test)
+{
+ u32 max_descs = XSK_RING_PROD__DEFAULT_NUM_DESCS * 2;
+ int ret;
+
+ test->total_steps = 2;
+ test->ifobj_tx->ring.set_tx = test->ifobj_tx->ring.max_tx;
+ test->ifobj_tx->ring.set_rx = test->ifobj_tx->ring.max_rx;
+ test->ifobj_rx->umem->num_frames = max_descs;
+ test->ifobj_rx->xsk->rxqsize = max_descs;
+ test->ifobj_rx->xsk->batch_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
+ ret = testapp_validate_traffic(test);
+ if (ret)
+ return ret;
+
+ /* Set batch_size to 4095 */
+ test->ifobj_rx->xsk->batch_size = max_descs - 1;
+ return testapp_validate_traffic(test);
+}
+
static void run_pkt_test(struct test_spec *test)
{
int ret;
@@ -2585,6 +2605,7 @@ static const struct test_spec tests[] = {
{.name = "UNALIGNED_INV_DESC_MULTI_BUFF", .test_func = testapp_unaligned_inv_desc_mb},
{.name = "TOO_MANY_FRAGS", .test_func = testapp_too_many_frags},
{.name = "HW_SW_MIN_RING_SIZE", .test_func = testapp_hw_sw_min_ring_size},
+ {.name = "HW_SW_MAX_RING_SIZE", .test_func = testapp_hw_sw_max_ring_size},
};
static void print_tests(void)
--
2.34.1
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