apsh_pslist_sample.c

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/*
 * Copyright (c) 2022 NVIDIA CORPORATION AND AFFILIATES.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
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 *       conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this list of
 *       conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
 *       to endorse or promote products derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 */
#include <inttypes.h>
 
#include <doca_apsh.h>
#include <doca_log.h>
 
#include "apsh_common.h"
 
DOCA_LOG_REGISTER(PSLIST);
 
/*
 * Calls the DOCA APSH API function that matches this sample name and prints the result
 *
 * @dma_device_name [in]: IBDEV Name of the device to use for DMA
 * @pci_vuid [in]: VUID of the device exposed to the target system
 * @os_type [in]: Indicates the OS type of the target system
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t pslist(const char *dma_device_name,
            const char *pci_vuid,
            enum doca_apsh_system_os os_type,
            const char *mem_region,
            const char *os_symbols)
{
    doca_error_t result;
    int num_processes, i;
    struct doca_apsh_ctx *apsh_ctx;
    struct doca_apsh_system *sys;
    struct doca_apsh_process **pslist;
 
    /* Init */
    result = init_doca_apsh(dma_device_name, &apsh_ctx);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the DOCA APSH lib");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH lib context init successful");
 
    result = init_doca_apsh_system(apsh_ctx, os_type, os_symbols, mem_region, pci_vuid, &sys);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the system context");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH system context created");
 
    result = doca_apsh_processes_get(sys, &pslist, &num_processes);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create the process list");
        cleanup_doca_apsh(apsh_ctx, sys);
        return result;
    }
    DOCA_LOG_INFO("Successfully performed %s. Host system contains %d processes", __func__, num_processes);
 
    /* Print some attributes of the processes */
    DOCA_LOG_INFO("First 5 (or less) processes of system:");
    for (i = 0; i < 5 && i < num_processes; ++i) {
        DOCA_LOG_INFO("\tProcess %d  -  name: %s, pid: %u, CPU cycles the process consumed: %lu",
                  i,
                  doca_apsh_process_info_get(pslist[i], DOCA_APSH_PROCESS_COMM),
                  doca_apsh_process_info_get(pslist[i], DOCA_APSH_PROCESS_PID),
                  doca_apsh_process_info_get(pslist[i], DOCA_APSH_PROCESS_CPU_TIME));
    }
 
    /* Cleanup */
    doca_apsh_processes_free(pslist);
    cleanup_doca_apsh(apsh_ctx, sys);
    return DOCA_SUCCESS;
}