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| 2 | |
| 3 | * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
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| 4 | * Copyright (c) 2024 David Vernet <[email protected]>
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| 5 |
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| 6 | #include <bpf/bpf.h>
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| 7 | #include <pthread.h>
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| 8 | #include <scx/common.h>
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| 9 | #include <sys/wait.h>
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| 10 | #include <unistd.h>
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| 11 | #include "maximal.bpf.skel.h"
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| 12 | #include "scx_test.h"
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| 13 |
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| 14 | static struct maximal *skel;
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| 15 | static pthread_t threads[2];
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| 16 |
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| 17 | bool force_exit = false;
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| 18 |
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| 19 | static enum scx_test_status setup(void **ctx)
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| 20 | {
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| 21 | skel = maximal__open();
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| 22 | SCX_FAIL_IF(!skel, "Failed to open");
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| 23 | SCX_ENUM_INIT(skel);
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| 24 | SCX_FAIL_IF(maximal__load(skel), "Failed to load skel");
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| 25 |
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| 26 | bpf_map__set_autoattach(skel->maps.maximal_ops, false);
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| 27 | SCX_FAIL_IF(maximal__attach(skel), "Failed to attach skel");
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| 28 |
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| 29 | return SCX_TEST_PASS;
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| 30 | }
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| 31 |
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| 32 | static void *do_reload_loop(void *arg)
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| 33 | {
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| 34 | u32 i;
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| 35 |
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| 36 | for (i = 0; i < 1024 && !force_exit; i++) {
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| 37 | struct bpf_link *link;
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| 38 |
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| 39 | link = bpf_map__attach_struct_ops(skel->maps.maximal_ops);
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| 40 | if (link)
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| 41 | bpf_link__destroy(link);
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| 42 | }
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| 43 |
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| 44 | return NULL;
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| 45 | }
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| 46 |
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| 47 | static enum scx_test_status run(void *ctx)
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| 48 | {
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| 49 | int err;
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| 50 | void *ret;
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| 51 |
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| 52 | err = pthread_create(&threads[0], NULL, do_reload_loop, NULL);
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| 53 | SCX_FAIL_IF(err, "Failed to create thread 0");
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| 54 |
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| 55 | err = pthread_create(&threads[1], NULL, do_reload_loop, NULL);
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| 56 | SCX_FAIL_IF(err, "Failed to create thread 1");
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| 57 |
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| 58 | SCX_FAIL_IF(pthread_join(threads[0], &ret), "thread 0 failed");
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| 59 | SCX_FAIL_IF(pthread_join(threads[1], &ret), "thread 1 failed");
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| 60 |
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| 61 | return SCX_TEST_PASS;
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| 62 | }
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| 63 |
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| 64 | static void cleanup(void *ctx)
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| 65 | {
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| 66 | force_exit = true;
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| 67 | maximal__destroy(skel);
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| 68 | }
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| 69 |
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| 70 | struct scx_test reload_loop = {
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| 71 | .name = "reload_loop",
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| 72 | .description = "Stress test loading and unloading schedulers repeatedly in a tight loop",
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| 73 | .setup = setup,
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| 74 | .run = run,
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| 75 | .cleanup = cleanup,
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| 76 | };
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| 77 | REGISTER_SCX_TEST(&reload_loop)
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