1a5495adea
Move build and build system checks to use CONFIG_MP_MAX_NUM_CPUS as we phase out CONFIG_MP_NUM_CPUS. Signed-off-by: Kumar Gala <kumar.gala@intel.com>
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/* Copyright (c) 2021 Intel Corporation.
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/ztest.h>
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/* Experimentally 10ms is enough time to get the second CPU to run on
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* all known platforms.
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*/
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#define CPU_START_DELAY 10000
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/* IPIs happen much faster than CPU startup */
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#define CPU_IPI_DELAY 100
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BUILD_ASSERT(CONFIG_SMP);
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BUILD_ASSERT(CONFIG_SMP_BOOT_DELAY);
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BUILD_ASSERT(CONFIG_KERNEL_COHERENCE);
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BUILD_ASSERT(CONFIG_MP_MAX_NUM_CPUS > 1);
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#define STACKSZ 2048
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char stack[STACKSZ];
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volatile bool mp_flag;
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struct k_thread cpu1_thr;
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K_THREAD_STACK_DEFINE(thr_stack, STACKSZ);
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extern void z_smp_start_cpu(int id);
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static void thread_fn(void *a, void *b, void *c)
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{
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mp_flag = true;
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}
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ZTEST(smp_boot_delay, test_smp_boot_delay)
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{
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/* Create a thread of lower priority. This could run on
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* another CPU if it was available, but will not preempt us
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* unless we block (which we do not).
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*/
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k_thread_create(&cpu1_thr, thr_stack, K_THREAD_STACK_SIZEOF(thr_stack),
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thread_fn, NULL, NULL, NULL,
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1, 0, K_NO_WAIT);
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/* Make sure that thread has not run (because the cpu is halted) */
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k_busy_wait(CPU_START_DELAY);
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zassert_false(mp_flag, "CPU1 must not be running yet");
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/* Start the second CPU */
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z_smp_start_cpu(1);
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/* Verify the thread ran */
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k_busy_wait(CPU_START_DELAY);
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zassert_true(mp_flag, "CPU1 did not start");
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k_thread_abort(&cpu1_thr);
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/* Spawn the same thread to do the same thing, but this time
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* expect that the thread is going to run synchronously on the
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* other CPU as soon as its created. Intended to test whether
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* IPIs were correctly set up on the runtime-launched CPU.
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*/
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mp_flag = false;
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k_thread_create(&cpu1_thr, thr_stack, K_THREAD_STACK_SIZEOF(thr_stack),
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thread_fn, NULL, NULL, NULL,
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1, 0, K_NO_WAIT);
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k_busy_wait(CPU_IPI_DELAY);
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zassert_true(mp_flag, "CPU1 did not start thread via IPI");
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}
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ZTEST_SUITE(smp_boot_delay, NULL, NULL, NULL, NULL, NULL);
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