1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates. 4 * Copyright (c) 2024 David Vernet <dvernet@meta.com> 5 * Copyright (c) 2024 Tejun Heo <tj@kernel.org> 6 */ 7 #include <bpf/bpf.h> 8 #include <scx/common.h> 9 #include <sys/wait.h> 10 #include <unistd.h> 11 #include "select_cpu_vtime.bpf.skel.h" 12 #include "scx_test.h" 13 14 static enum scx_test_status setup(void **ctx) 15 { 16 struct select_cpu_vtime *skel; 17 18 skel = select_cpu_vtime__open(); 19 SCX_FAIL_IF(!skel, "Failed to open"); 20 SCX_ENUM_INIT(skel); 21 SCX_FAIL_IF(select_cpu_vtime__load(skel), "Failed to load skel"); 22 23 *ctx = skel; 24 25 return SCX_TEST_PASS; 26 } 27 28 static enum scx_test_status run(void *ctx) 29 { 30 struct select_cpu_vtime *skel = ctx; 31 struct bpf_link *link; 32 33 SCX_ASSERT(!skel->bss->consumed); 34 35 link = bpf_map__attach_struct_ops(skel->maps.select_cpu_vtime_ops); 36 SCX_FAIL_IF(!link, "Failed to attach scheduler"); 37 38 sleep(1); 39 40 SCX_ASSERT(skel->bss->consumed); 41 42 bpf_link__destroy(link); 43 44 return SCX_TEST_PASS; 45 } 46 47 static void cleanup(void *ctx) 48 { 49 struct select_cpu_vtime *skel = ctx; 50 51 select_cpu_vtime__destroy(skel); 52 } 53 54 struct scx_test select_cpu_vtime = { 55 .name = "select_cpu_vtime", 56 .description = "Test doing direct vtime-dispatching from " 57 "ops.select_cpu(), to a non-built-in DSQ", 58 .setup = setup, 59 .run = run, 60 .cleanup = cleanup, 61 }; 62 REGISTER_SCX_TEST(&select_cpu_vtime) 63