/*
* Copyright (C) 2019 Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice(s),
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice(s),
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 THE COPYRIGHT HOLDER(S) 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; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <memkind/internal/memkind_dax_kmem.h>
#include <memkind.h>
#include <numa.h>
#include <stdio.h>
#define MAX_ARG_LEN 8
static const char *const help_message =
"\n"
"NAME\n"
" memkind-auto-dax-kmem-nodes - prints comma-separated list of automatically detected persistent memory NUMA nodes.\n"
"\n"
"SYNOPSIS\n"
" memkind-auto-dax-kmem-nodes -h | --help\n"
" Prints this help message.\n"
"\n"
"DESCRIPTION\n"
" Prints a comma-separated list of automatically detected persistent memory NUMA nodes\n"
" that can be used with the numactl --membind option.\n"
"\n"
"EXIT STATUS\n"
" Return code is :\n"
" 0 on success\n"
" 1 if automatic detection is disabled (memkind wasn't build with suitable libdaxctl-devel version)\n"
" 2 on invalid argument\n"
" 3 on other failure\n"
"\n"
"COPYRIGHT\n"
" Copyright 2019 Intel Corporation All Rights Reserved.\n"
"\n"
"AUTHORS\n"
" Michal Biesek\n"
"\n"
"SEE ALSO\n"
" memkind(3)\n"
"\n";
static int print_dax_kmem_nodes()
{
unsigned i, j = 0;
nodemask_t nodemask;
struct bitmask nodemask_dax_kmem = {NUMA_NUM_NODES, nodemask.n};
// ensuring functions in numa library are defined
if (numa_available() == -1) {
return 3;
}
numa_bitmask_clearall(&nodemask_dax_kmem);
//WARNING: code below is usage of memkind experimental API which may be changed in future
int status = memkind_dax_kmem_all_get_mbind_nodemask(NULL, nodemask.n,
NUMA_NUM_NODES);
if (status == MEMKIND_ERROR_OPERATION_FAILED ) {
return 1;
} else if (status != MEMKIND_SUCCESS ) {
return 3;
}
for(i = 0; i<NUMA_NUM_NODES; i++) {
if(numa_bitmask_isbitset(&nodemask_dax_kmem, i)) {
printf("%u%s", i, (++j == numa_bitmask_weight(&nodemask_dax_kmem)) ? "" : ",");
}
}
printf("\n");
return 0;
}
int main(int argc, char *argv[])
{
if(argc == 1) {
return print_dax_kmem_nodes();
} else if ((argc == 2) && (strncmp(argv[1], "-h", MAX_ARG_LEN) == 0 ||
strncmp(argv[1], "--help", MAX_ARG_LEN) == 0)) {
printf("%s", help_message);
return 0;
}
printf("ERROR: Unknown option %s. More info with \"%s --help\".\n", argv[1],
argv[0]);
return 2;
}