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/*
* Copyright (c) 2014-2018 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This test creates a thread that tests cross-calls for all combinations
* of processors. This thread sequentially creates other threads that are
* bound to a single processor, and perform cross-calls to all processors,
* including the local one.
*/
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <kern/cpumap.h>
#include <kern/error.h>
#include <kern/init.h>
#include <kern/log.h>
#include <kern/panic.h>
#include <kern/thread.h>
#include <kern/xcall.h>
#include <test/test.h>
struct test_data {
unsigned int cpu;
bool done;
};
static void
test_fn(void *arg)
{
struct test_data *data;
assert(thread_interrupted());
data = arg;
if (data->cpu != cpu_id()) {
panic("test: invalid cpu");
}
log_info("function called, running on cpu%u\n", cpu_id());
data->done = true;
}
static void
test_once(unsigned int cpu)
{
struct test_data data;
data.cpu = cpu;
data.done = false;
log_info("cross-call: cpu%u -> cpu%u:\n", cpu_id(), cpu);
xcall_call(test_fn, &data, cpu);
if (!data.done) {
panic("test: xcall failed");
}
}
static void
test_run_cpu(void *arg)
{
(void)arg;
for (unsigned int i = (cpu_count() - 1); i < cpu_count(); i--) {
test_once(i);
}
}
static void
test_run(void *arg)
{
char name[THREAD_NAME_SIZE];
struct thread_attr attr;
struct thread *thread;
struct cpumap *cpumap;
unsigned int cpu;
int error;
(void)arg;
error = cpumap_create(&cpumap);
error_check(error, "cpumap_create");
for (unsigned int i = 0; i < cpu_count(); i++) {
/*
* Send IPIs from CPU 1 first, in order to better trigger any
* initialization race that may prevent correct IPI transmission.
* This assumes CPUs are initialized sequentially, and that CPU 1
* may have finished initialization much earlier than the last CPU.
* CPU 0 isn't used since it's the one normally initializing remote
* CPUs.
*/
cpu = (1 + i) % cpu_count();
cpumap_zero(cpumap);
cpumap_set(cpumap, cpu);
snprintf(name, sizeof(name), THREAD_KERNEL_PREFIX "test_run/%u", cpu);
thread_attr_init(&attr, name);
thread_attr_set_cpumap(&attr, cpumap);
error = thread_create(&thread, &attr, test_run_cpu, NULL);
error_check(error, "thread_create");
thread_join(thread);
}
cpumap_destroy(cpumap);
log_info("done\n");
}
void __init
test_setup(void)
{
struct thread_attr attr;
struct thread *thread;
int error;
thread_attr_init(&attr, THREAD_KERNEL_PREFIX "test_run");
thread_attr_set_detached(&attr);
error = thread_create(&thread, &attr, test_run, NULL);
error_check(error, "thread_create");
}
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