[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/lttng-export.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;
}

LTTNG_EXPORT 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>
4bd69c5f	17	#include <lttng/lttng-export.h>
568d7e2d JR	18	#include <lttng/ust-getcpu.h>
568d7e2d JR	19
de76faf8 JG	20	static long nprocessors;
de76faf8 JG	21
f12eb9c1	22	static
568d7e2d JR	23	int plugin_getcpu(void)
	24	{
	25	/* Generate a sequence based on the number of configurated processor
	26	* by using sequence[i] % nb_configured_processors. Where sequence
	27	* is a static random sequence.
	28	* The expected cpu_id sequence can be regenerated on the test script
	29	* side and compared to the extracted cpu sequence for validation.
	30	* This does no guarantee in absolute the validity of the getcpu
	31	* plugin but provide a strong argument of it's validity.
	32	*/
	33	static int i = 0;
885fe378 JG	34	static int seq_seed[256] = { 100, 57, 232, 236, 42, 193, 224, 184, 216,
	35	150, 92, 91, 108, 118, 55, 243, 65, 101, 209, 0, 147, 36, 29,
	36	34, 49, 188, 174, 105, 253, 245, 227, 238, 112, 20, 222, 201,
	37	102, 175, 119, 19, 132, 41, 78, 90, 114, 64, 138, 14, 48, 18,
	38	162, 85, 204, 124, 133, 73, 172, 106, 241, 126, 28, 104, 111,
	39	21, 127, 219, 9, 244, 237, 189, 59, 214, 52, 141, 107, 26, 25,
	40	199, 3, 157, 117, 234, 33, 44, 46, 84, 69, 155, 122, 250, 231,
	41	86, 239, 76, 190, 120, 1, 94, 206, 8, 148, 159, 167, 215, 164,
	42	31, 217, 61, 71, 125, 68, 109, 195, 177, 95, 82, 142, 182, 129,
	43	87, 37, 140, 134, 186, 173, 39, 116, 143, 254, 229, 131, 67,
	44	121, 192, 240, 15, 221, 30, 242, 185, 80, 170, 135, 51, 187,
	45	194, 246, 12, 225, 181, 137, 211, 228, 88, 218, 27, 233, 161,
	46	77, 252, 123, 93, 220, 248, 205, 223, 144, 128, 196, 70, 247,
	47	210, 178, 203, 154, 24, 169, 149, 163, 35, 7, 151, 103, 197,
	48	139, 165, 158, 207, 72, 113, 145, 45, 183, 11, 198, 43, 81, 230,
	49	97, 96, 2, 66, 213, 146, 179, 22, 58, 54, 38, 160, 200, 235,
	50	226, 156, 56, 208, 249, 32, 176, 168, 110, 191, 79, 152, 115,
	51	10, 74, 60, 251, 17, 83, 180, 171, 202, 40, 166, 255, 53, 212,
	52	98, 5, 50, 99, 4, 89, 13, 63, 6, 136, 153, 23, 16, 47, 130, 75,
	53	62 };
568d7e2d	54	int ret;
de76faf8 JG	55
de76faf8 JG	56	ret = seq_seed[i] % nprocessors;
568d7e2d JR	57	i++;
	58	i = i % 256;
	59	return ret;
	60	}
	61
4bd69c5f	62	LTTNG_EXPORT void lttng_ust_getcpu_plugin_init(void);
568d7e2d JR	63	void lttng_ust_getcpu_plugin_init(void)
	64	{
	65	int ret;
	66
de76faf8 JG	67	nprocessors = sysconf(_SC_NPROCESSORS_CONF);
	68	if (nprocessors < 0) {
	69	perror("Failed to get _SC_NPROCESSORS_CONF");
	70	goto error;
	71	}
	72
568d7e2d JR	73	ret = lttng_ust_getcpu_override(plugin_getcpu);
	74	if (ret) {
	75	fprintf(stderr, "Error enabling getcpu override: %s\n",
	76	strerror(-ret));
	77	goto error;
	78	}
	79	return;
	80
	81	error:
	82	exit(EXIT_FAILURE);
	83	}