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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (c) 2023 Meta Platforms, Inc. and affiliates. * Copyright (c) 2023 David Vernet <dvernet@meta.com> * Copyright (c) 2023 Tejun Heo <tj@kernel.org> */#include <bpf/bpf.h>#include <scx/common.h>#include <sys/wait.h>#include <unistd.h>#include "select_cpu_dispatch.bpf.skel.h"#include "scx_test.h"
#define NUM_CHILDREN 1028
static enum scx_test_status setup(void **ctx){ struct select_cpu_dispatch *skel;
skel = select_cpu_dispatch__open(); SCX_FAIL_IF(!skel, "Failed to open"); SCX_ENUM_INIT(skel); SCX_FAIL_IF(select_cpu_dispatch__load(skel), "Failed to load skel");
*ctx = skel;
return SCX_TEST_PASS;}
static enum scx_test_status run(void *ctx){ struct select_cpu_dispatch *skel = ctx; struct bpf_link *link; pid_t pids[NUM_CHILDREN]; int i, status;
link = bpf_map__attach_struct_ops(skel->maps.select_cpu_dispatch_ops); SCX_FAIL_IF(!link, "Failed to attach scheduler");
for (i = 0; i < NUM_CHILDREN; i++) { pids[i] = fork(); if (pids[i] == 0) { sleep(1); exit(0); } }
for (i = 0; i < NUM_CHILDREN; i++) { SCX_EQ(waitpid(pids[i], &status, 0), pids[i]); SCX_EQ(status, 0); }
bpf_link__destroy(link);
return SCX_TEST_PASS;}
static void cleanup(void *ctx){ struct select_cpu_dispatch *skel = ctx;
select_cpu_dispatch__destroy(skel);}
struct scx_test select_cpu_dispatch = { .name = "select_cpu_dispatch", .description = "Test direct dispatching to built-in DSQs from " "ops.select_cpu()", .setup = setup, .run = run, .cleanup = cleanup,};REGISTER_SCX_TEST(&select_cpu_dispatch)