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| 3 | * Copyright (c) 2026 fangqiurong <[email protected]>
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| 4 |
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| 5 | #include <bpf/bpf.h>
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| 6 | #include <scx/common.h>
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| 7 | #include <time.h>
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| 8 | #include <unistd.h>
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| 9 | #include "dequeue_iter.bpf.skel.h"
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| 10 | #include "scx_test.h"
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| 11 |
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| 12 | #define DQ_TARGET 10
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| 13 | #define DQ_DEADLINE_MS 3000
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| 14 |
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| 15 | static unsigned long long now_ms(void)
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| 16 | {
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| 17 | struct timespec ts;
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| 18 |
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| 19 | clock_gettime(CLOCK_MONOTONIC, &ts);
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| 20 |
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| 21 | return ts.tv_sec * 1000ULL + ts.tv_nsec / 1000000;
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| 22 | }
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| 23 |
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| 24 | static enum scx_test_status setup(void **ctx)
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| 25 | {
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| 26 | struct dequeue_iter *skel;
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| 27 |
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| 28 | skel = dequeue_iter__open();
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| 29 | SCX_FAIL_IF(!skel, "Failed to open");
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| 30 | SCX_ENUM_INIT(skel);
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| 31 | SCX_FAIL_IF(dequeue_iter__load(skel), "Failed to load skel");
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| 32 |
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| 33 | *ctx = skel;
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| 34 |
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| 35 | return SCX_TEST_PASS;
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| 36 | }
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| 37 |
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| 38 | static enum scx_test_status run(void *ctx)
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| 39 | {
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| 40 | struct dequeue_iter *skel = ctx;
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| 41 | struct bpf_link *link;
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| 42 | unsigned long long end;
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| 43 |
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| 44 | link = bpf_map__attach_struct_ops(skel->maps.dequeue_iter_ops);
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| 45 | SCX_FAIL_IF(!link, "Failed to attach scheduler");
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| 46 |
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| 47 | end = now_ms() + DQ_DEADLINE_MS;
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| 48 | while (skel->bss->dq_count < DQ_TARGET && !UEI_EXITED(skel, uei) &&
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| 49 | now_ms() < end)
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| 50 | usleep(100);
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| 51 |
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| 52 | bpf_link__destroy(link);
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| 53 |
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| 54 | SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG));
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| 55 |
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| 56 | if (skel->bss->dq_count < DQ_TARGET) {
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| 57 | SCX_ERR("ops.dequeue() fired only %llu times",
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| 58 | (unsigned long long)skel->bss->dq_count);
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| 59 | return SCX_TEST_FAIL;
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| 60 | }
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| 61 |
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| 62 | return SCX_TEST_PASS;
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| 63 | }
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| 64 |
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| 65 | static void cleanup(void *ctx)
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| 66 | {
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| 67 | struct dequeue_iter *skel = ctx;
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| 68 |
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| 69 | dequeue_iter__destroy(skel);
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| 70 | }
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| 71 |
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| 72 | struct scx_test dequeue_iter = {
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| 73 | .name = "dequeue_iter",
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| 74 | .description = "Verify ops.dequeue() can iterate its source user DSQ",
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| 75 | .setup = setup,
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| 76 | .run = run,
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| 77 | .cleanup = cleanup,
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| 78 | };
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| 79 | REGISTER_SCX_TEST(&dequeue_iter)
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