[lttng-tools.git] / tests / regression / ust / getcpu-override / lttng-ust-getcpu-override-test.c

/*
 * lttng-ust-getcpu-override-test.c
 * Based on lttng-getcpu-override-example.c from LTTng-ust exemple
 *
 * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * Copyright (C) 2015 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 */

#include <stdlib.h>
#include <common/compat/time.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <lttng/ust-getcpu.h>

static long nprocessors;

static
int plugin_getcpu(void)
{
	/* Generate a sequence based on the number of configurated processor
	 * by using sequence[i] % nb_configured_processors. Where sequence
	 * is a static random sequence.
	 * The expected cpu_id sequence can be regenerated on the test script
	 * side and compared to the extracted cpu sequence for validation.
	 * This does no guarantee in absolute the validity of the getcpu
	 * plugin but provide a strong argument of it's validity.
	 */
	static int i = 0;
	static int seq_seed[256] = { 100, 57, 232, 236, 42, 193, 224, 184, 216,
		150, 92, 91, 108, 118, 55, 243, 65, 101, 209, 0, 147, 36, 29,
		34, 49, 188, 174, 105, 253, 245, 227, 238, 112, 20, 222, 201,
		102, 175, 119, 19, 132, 41, 78, 90, 114, 64, 138, 14, 48, 18,
		162, 85, 204, 124, 133, 73, 172, 106, 241, 126, 28, 104, 111,
		21, 127, 219, 9, 244, 237, 189, 59, 214, 52, 141, 107, 26, 25,
		199, 3, 157, 117, 234, 33, 44, 46, 84, 69, 155, 122, 250, 231,
		86, 239, 76, 190, 120, 1, 94, 206, 8, 148, 159, 167, 215, 164,
		31, 217, 61, 71, 125, 68, 109, 195, 177, 95, 82, 142, 182, 129,
		87, 37, 140, 134, 186, 173, 39, 116, 143, 254, 229, 131, 67,
		121, 192, 240, 15, 221, 30, 242, 185, 80, 170, 135, 51, 187,
		194, 246, 12, 225, 181, 137, 211, 228, 88, 218, 27, 233, 161,
		77, 252, 123, 93, 220, 248, 205, 223, 144, 128, 196, 70, 247,
		210, 178, 203, 154, 24, 169, 149, 163, 35, 7, 151, 103, 197,
		139, 165, 158, 207, 72, 113, 145, 45, 183, 11, 198, 43, 81, 230,
		97, 96, 2, 66, 213, 146, 179, 22, 58, 54, 38, 160, 200, 235,
		226, 156, 56, 208, 249, 32, 176, 168, 110, 191, 79, 152, 115,
		10, 74, 60, 251, 17, 83, 180, 171, 202, 40, 166, 255, 53, 212,
		98, 5, 50, 99, 4, 89, 13, 63, 6, 136, 153, 23, 16, 47, 130, 75,
		62 };
	int ret;

	ret = seq_seed[i] % nprocessors;
	i++;
	i = i % 256;
	return ret;
}

void lttng_ust_getcpu_plugin_init(void);
void lttng_ust_getcpu_plugin_init(void)
{
	int ret;

	nprocessors = sysconf(_SC_NPROCESSORS_CONF);
	if (nprocessors < 0) {
		perror("Failed to get _SC_NPROCESSORS_CONF");
		goto error;
	}

	ret = lttng_ust_getcpu_override(plugin_getcpu);
	if (ret) {
		fprintf(stderr, "Error enabling getcpu override: %s\n",
			strerror(-ret));
		goto error;
	}
	return;

error:
	exit(EXIT_FAILURE);
}
Commit	Line	Data
568d7e2d JR	1	/*
	2	* lttng-ust-getcpu-override-test.c
	3	* Based on lttng-getcpu-override-example.c from LTTng-ust exemple
	4	*
9d16b343 MJ	5	* Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9d16b343 MJ	6	* Copyright (C) 2015 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
568d7e2d	7	*
9d16b343	8	* SPDX-License-Identifier: MIT
568d7e2d	9	*
568d7e2d JR	10	*/
	11
	12	#include <stdlib.h>
389fbf04	13	#include <common/compat/time.h>
568d7e2d JR	14	#include <string.h>
	15	#include <stdio.h>
	16	#include <unistd.h>
	17	#include <lttng/ust-getcpu.h>
	18
de76faf8 JG	19	static long nprocessors;
de76faf8 JG	20
f12eb9c1	21	static
568d7e2d JR	22	int plugin_getcpu(void)
	23	{
	24	/* Generate a sequence based on the number of configurated processor
	25	* by using sequence[i] % nb_configured_processors. Where sequence
	26	* is a static random sequence.
	27	* The expected cpu_id sequence can be regenerated on the test script
	28	* side and compared to the extracted cpu sequence for validation.
	29	* This does no guarantee in absolute the validity of the getcpu
	30	* plugin but provide a strong argument of it's validity.
	31	*/
	32	static int i = 0;
885fe378 JG	33	static int seq_seed[256] = { 100, 57, 232, 236, 42, 193, 224, 184, 216,
	34	150, 92, 91, 108, 118, 55, 243, 65, 101, 209, 0, 147, 36, 29,
	35	34, 49, 188, 174, 105, 253, 245, 227, 238, 112, 20, 222, 201,
	36	102, 175, 119, 19, 132, 41, 78, 90, 114, 64, 138, 14, 48, 18,
	37	162, 85, 204, 124, 133, 73, 172, 106, 241, 126, 28, 104, 111,
	38	21, 127, 219, 9, 244, 237, 189, 59, 214, 52, 141, 107, 26, 25,
	39	199, 3, 157, 117, 234, 33, 44, 46, 84, 69, 155, 122, 250, 231,
	40	86, 239, 76, 190, 120, 1, 94, 206, 8, 148, 159, 167, 215, 164,
	41	31, 217, 61, 71, 125, 68, 109, 195, 177, 95, 82, 142, 182, 129,
	42	87, 37, 140, 134, 186, 173, 39, 116, 143, 254, 229, 131, 67,
	43	121, 192, 240, 15, 221, 30, 242, 185, 80, 170, 135, 51, 187,
	44	194, 246, 12, 225, 181, 137, 211, 228, 88, 218, 27, 233, 161,
	45	77, 252, 123, 93, 220, 248, 205, 223, 144, 128, 196, 70, 247,
	46	210, 178, 203, 154, 24, 169, 149, 163, 35, 7, 151, 103, 197,
	47	139, 165, 158, 207, 72, 113, 145, 45, 183, 11, 198, 43, 81, 230,
	48	97, 96, 2, 66, 213, 146, 179, 22, 58, 54, 38, 160, 200, 235,
	49	226, 156, 56, 208, 249, 32, 176, 168, 110, 191, 79, 152, 115,
	50	10, 74, 60, 251, 17, 83, 180, 171, 202, 40, 166, 255, 53, 212,
	51	98, 5, 50, 99, 4, 89, 13, 63, 6, 136, 153, 23, 16, 47, 130, 75,
	52	62 };
568d7e2d	53	int ret;
de76faf8 JG	54
de76faf8 JG	55	ret = seq_seed[i] % nprocessors;
568d7e2d JR	56	i++;
	57	i = i % 256;
	58	return ret;
	59	}
	60
f12eb9c1	61	void lttng_ust_getcpu_plugin_init(void);
568d7e2d JR	62	void lttng_ust_getcpu_plugin_init(void)
	63	{
	64	int ret;
	65
de76faf8 JG	66	nprocessors = sysconf(_SC_NPROCESSORS_CONF);
	67	if (nprocessors < 0) {
	68	perror("Failed to get _SC_NPROCESSORS_CONF");
	69	goto error;
	70	}
	71
568d7e2d JR	72	ret = lttng_ust_getcpu_override(plugin_getcpu);
	73	if (ret) {
	74	fprintf(stderr, "Error enabling getcpu override: %s\n",
	75	strerror(-ret));
	76	goto error;
	77	}
	78	return;
	79
	80	error:
	81	exit(EXIT_FAILURE);
	82	}