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[bpf-next,v2,7/7] selftests/xsk: add new test case for AF_XDP under max ring sizes

Message ID 20240321134911.120091-8-tushar.vyavahare@intel.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Selftests/xsk: Test with maximum and minimum HW ring size configurations | expand

Checks

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bpf/vmtest-bpf-next-PR fail PR summary
netdev/series_format success Posting correctly formatted
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netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 13 maintainers not CCed: linux-kselftest@vger.kernel.org haoluo@google.com john.fastabend@gmail.com eddyz87@gmail.com sdf@google.com song@kernel.org kpsingh@kernel.org shuah@kernel.org yonghong.song@linux.dev martin.lau@linux.dev jolsa@kernel.org mykolal@fb.com andrii@kernel.org
netdev/build_clang success Errors and warnings before: 8 this patch: 8
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netdev/check_selftest success No net selftest shell script
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Commit Message

Tushar Vyavahare March 21, 2024, 1:49 p.m. UTC
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's behavior under different configurations.

Signed-off-by: Tushar Vyavahare <tushar.vyavahare@intel.com>
---
 tools/testing/selftests/bpf/xskxceiver.c | 25 ++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index dac2dcf39bb8..2eac0895b0a1 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -2439,6 +2439,30 @@  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->set_ring = true;
+	test->total_steps = 2;
+	test->ifobj_tx->ring.tx_pending = test->ifobj_tx->ring.tx_max_pending;
+	test->ifobj_tx->ring.rx_pending  = test->ifobj_tx->ring.rx_max_pending;
+	test->ifobj_rx->umem->num_frames = max_descs;
+	test->ifobj_rx->xsk->rxqsize = max_descs;
+	test->ifobj_tx->xsk->batch_size = XSK_RING_PROD__DEFAULT_NUM_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_tx->xsk->batch_size = max_descs - 1;
+	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;
@@ -2544,6 +2568,7 @@  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)