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selftests/xsk: Add new test case for AF_XDP under max ring sizes

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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>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20240402114529.545475-8-tushar.vyavahare@intel.com
This commit is contained in:
Tushar Vyavahare 2024-04-02 11:45:29 +00:00 committed by Daniel Borkmann
parent c4f960539f
commit c53908b254
1 changed files with 25 additions and 0 deletions
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25
tools/testing/selftests/bpf/xskxceiver.c
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@ -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)