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git.proxmox.com Git - ceph.git/blob - ceph/src/spdk/dpdk/app/test/test_cycles.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
8 #include <rte_common.h>
9 #include <rte_cycles.h>
19 * - Loop N times and check that the timer always increments and
20 * never decrements during this loop.
22 * - Wait one second using rte_usleep() and check that the increment
23 * of cycles is correct with regard to the frequency of the timer.
27 check_wait_one_second(void)
29 uint64_t cycles
, prev_cycles
;
30 uint64_t hz
= rte_get_timer_hz();
31 uint64_t max_inc
= (hz
/ 100); /* 10 ms max between 2 reads */
33 /* check that waiting 1 second is precise */
34 prev_cycles
= rte_get_timer_cycles();
35 rte_delay_us(1000000);
36 cycles
= rte_get_timer_cycles();
38 if ((uint64_t)(cycles
- prev_cycles
) > (hz
+ max_inc
)) {
39 printf("delay_us is not accurate: too long\n");
42 if ((uint64_t)(cycles
- prev_cycles
) < (hz
- max_inc
)) {
43 printf("delay_us is not accurate: too short\n");
54 uint64_t start_cycles
, cycles
, prev_cycles
;
55 uint64_t hz
= rte_get_timer_hz();
56 uint64_t max_inc
= (hz
/ 100); /* 10 ms max between 2 reads */
58 /* check that the timer is always incrementing */
59 start_cycles
= rte_get_timer_cycles();
60 prev_cycles
= start_cycles
;
62 cycles
= rte_get_timer_cycles();
63 if ((uint64_t)(cycles
- prev_cycles
) > max_inc
) {
64 printf("increment too high or going backwards\n");
70 return check_wait_one_second();
73 REGISTER_TEST_COMMAND(cycles_autotest
, test_cycles
);
76 * One second precision test with rte_delay_us_sleep.
80 test_delay_us_sleep(void)
82 rte_delay_us_callback_register(rte_delay_us_sleep
);
83 return check_wait_one_second();
86 REGISTER_TEST_COMMAND(delay_us_sleep_autotest
, test_delay_us_sleep
);
89 * rte_delay_us_callback test
91 * - check if callback is correctly registered/unregistered
95 static unsigned int pattern
;
96 static void my_rte_delay_us(unsigned int us
)
102 test_user_delay_us(void)
110 /* register custom delay function */
111 rte_delay_us_callback_register(my_rte_delay_us
);
121 /* restore original delay function */
122 rte_delay_us_callback_register(rte_delay_us_block
);
131 REGISTER_TEST_COMMAND(user_delay_us
, test_user_delay_us
);