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_and_load(); 19 SCX_FAIL_IF(!skel, "Failed to open and load skel"); 20 *ctx = skel; 21 22 return SCX_TEST_PASS; 23 } 24 25 static enum scx_test_status run(void *ctx) 26 { 27 struct select_cpu_vtime *skel = ctx; 28 struct bpf_link *link; 29 30 SCX_ASSERT(!skel->bss->consumed); 31 32 link = bpf_map__attach_struct_ops(skel->maps.select_cpu_vtime_ops); 33 SCX_FAIL_IF(!link, "Failed to attach scheduler"); 34 35 sleep(1); 36 37 SCX_ASSERT(skel->bss->consumed); 38 39 bpf_link__destroy(link); 40 41 return SCX_TEST_PASS; 42 } 43 44 static void cleanup(void *ctx) 45 { 46 struct select_cpu_vtime *skel = ctx; 47 48 select_cpu_vtime__destroy(skel); 49 } 50 51 struct scx_test select_cpu_vtime = { 52 .name = "select_cpu_vtime", 53 .description = "Test doing direct vtime-dispatching from " 54 "ops.select_cpu(), to a non-built-in DSQ", 55 .setup = setup, 56 .run = run, 57 .cleanup = cleanup, 58 }; 59 REGISTER_SCX_TEST(&select_cpu_vtime) 60