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sys_info.c
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sys_info.c
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/**
* Copyright (c) NVIDIA CORPORATION & AFFILIATES, 2001-2015. ALL RIGHTS RESERVED.
* Copyright (C) Shanghai Zhaoxin Semiconductor Co., Ltd. 2020. ALL RIGHTS RESERVED.
* Copyright (C) Tactical Computing Labs, LLC. 2022. ALL RIGHTS RESERVED.
* Copyright (C) Advanced Micro Devices, Inc. 2024. ALL RIGHTS RESERVED.
*
* See file LICENSE for terms.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "ucx_info.h"
#include <ucs/sys/string.h>
#include <ucs/sys/sys.h>
#include <ucs/sys/math.h>
#include <ucs/time/time.h>
#include <ucs/config/parser.h>
#include <ucs/config/global_opts.h>
#include <sys/mman.h>
#include <string.h>
static double measure_memcpy_bandwidth(size_t size)
{
ucs_time_t start_time, end_time;
void *src, *dst;
double result = 0.0;
int iter;
src = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (src == MAP_FAILED) {
goto out;
}
dst = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (dst == MAP_FAILED) {
goto out_unmap_src;
}
memset(dst, 0, size);
memset(src, 0, size);
memcpy(dst, src, size);
iter = 0;
start_time = ucs_get_time();
do {
ucs_memcpy_relaxed(dst, src, size, UCS_ARCH_MEMCPY_NT_NONE, size);
end_time = ucs_get_time();
++iter;
} while (end_time < start_time + ucs_time_from_sec(0.5));
result = size * iter / ucs_time_to_sec(end_time - start_time);
munmap(dst, size);
out_unmap_src:
munmap(src, size);
out:
return result;
}
static void print_repeat_char(int ch, int count)
{
int i;
for (i = 0; i < count; ++i) {
putchar(ch);
}
}
static void print_row_separator(int column_width, int first_column_width,
int num_columns, int fill_char,
int separator_char)
{
int i;
printf("# %c", separator_char);
print_repeat_char(fill_char, first_column_width);
for (i = 0; i < num_columns; ++i) {
putchar(separator_char);
print_repeat_char(fill_char, column_width);
}
printf("%c\n", separator_char);
}
static void print_table_header(const char *title, const char *distance_unit,
int column_width, int first_column_width,
int num_columns)
{
int column;
printf("#\n");
printf("# %s\n", title);
printf("#\n");
print_row_separator(column_width, first_column_width, num_columns, '-',
'+');
print_row_separator(column_width, first_column_width, num_columns, ' ',
'|');
printf("# |%*s ", first_column_width - 1, distance_unit);
for (column = 0; column < num_columns; ++column) {
printf("|%*s ", column_width - 1,
ucs_topo_sys_device_get_name((ucs_sys_device_t)column));
}
printf("|\n");
print_row_separator(column_width, first_column_width, num_columns, ' ',
'|');
print_row_separator(column_width, first_column_width, num_columns, '-',
'+');
}
static void print_sys_topo()
{
const unsigned num_devices = ucs_topo_num_devices();
static const int distance_width = 10;
static const char *system_topo_title = "System topology";
static const char *distance_unit = "MB/s";
static const char *memory_latency_title = "NUMA memory latency";
static const char *numa_distance_unit = "nsec";
ucs_sys_device_t sys_dev1, sys_dev2;
ucs_sys_dev_distance_t distance;
char distance_str[20];
ucs_status_t status;
int name_width;
/* Get maximal width of device name */
name_width = 2 + strlen(distance_unit);
for (sys_dev1 = 0; sys_dev1 < num_devices; ++sys_dev1) {
name_width = ucs_max(
name_width, 2 + strlen(ucs_topo_sys_device_get_name(sys_dev1)));
}
print_table_header(system_topo_title, distance_unit, distance_width,
name_width, num_devices);
/* Print table content */
for (sys_dev1 = 0; sys_dev1 < num_devices; ++sys_dev1) {
print_row_separator(distance_width, name_width, num_devices, ' ', '|');
printf("# |%*s ", name_width - 1,
ucs_topo_sys_device_get_name(sys_dev1));
for (sys_dev2 = 0; sys_dev2 < num_devices; ++sys_dev2) {
if (sys_dev1 == sys_dev2) {
/* Do not print distance of device to itself */
strncpy(distance_str, "-", sizeof(distance_str));
} else {
status = ucs_topo_get_distance(sys_dev1, sys_dev2, &distance);
if (status != UCS_OK) {
ucs_snprintf_safe(distance_str, sizeof(distance_str),
"<%s>", ucs_status_string(status));
} else if (distance.bandwidth > UCS_PBYTE) {
ucs_snprintf_safe(distance_str, sizeof(distance_str),
"inf");
} else {
ucs_snprintf_safe(distance_str, sizeof(distance_str),
"%.1f", distance.bandwidth / UCS_MBYTE);
}
}
printf("|%*s ", distance_width - 1, distance_str);
}
printf("|\n");
print_row_separator(distance_width, name_width, num_devices, ' ', '|');
print_row_separator(distance_width, name_width, num_devices, '-', '+');
}
print_table_header(memory_latency_title, "device", distance_width,
name_width, num_devices);
print_row_separator(distance_width, name_width, num_devices, ' ', '|');
printf("# |%*s ", name_width - 1, numa_distance_unit);
printf("|");
for (sys_dev1 = 0; sys_dev1 < num_devices; ++sys_dev1) {
ucs_topo_get_memory_distance(sys_dev1, &distance);
ucs_snprintf_safe(distance_str, sizeof(distance_str), "%.1f",
distance.latency * UCS_NSEC_PER_SEC);
printf("%*s |", distance_width - 1, distance_str);
}
printf("\n");
print_row_separator(distance_width, name_width, num_devices, ' ', '|');
print_row_separator(distance_width, name_width, num_devices, '-', '+');
printf("# Memory latency is calculated according to the CPU affinity\n");
}
static double measure_timer_accuracy()
{
double elapsed, elapsed_accurate;
ucs_time_t time0, time1;
double sec0, sec1;
sec0 = ucs_get_accurate_time();
time0 = ucs_get_time();
usleep(100000);
sec1 = ucs_get_accurate_time();
time1 = ucs_get_time();
elapsed = ucs_time_to_sec(time1 - time0);
elapsed_accurate = sec1 - sec0;
return ucs_min(elapsed, elapsed_accurate) /
ucs_max(elapsed, elapsed_accurate);
}
void print_sys_info(int print_opts)
{
size_t size;
if (print_opts & PRINT_SYS_INFO) {
printf("# Timer frequency: %.3f MHz\n",
ucs_get_cpu_clocks_per_sec() / 1e6);
printf("# Timer accuracy: %.3f %%\n", measure_timer_accuracy() * 100);
printf("# %s: %s\n", UCS_CPU_VENDOR_LABEL, ucs_cpu_vendor_name());
printf("# %s: %s\n", UCS_CPU_MODEL_LABEL, ucs_cpu_model_name());
printf("# %s: %s\n", UCS_SYS_DMI_PRODUCT_NAME_LABEL,
ucs_sys_dmi_product_name());
}
if (print_opts & PRINT_SYS_TOPO) {
print_sys_topo();
}
if (print_opts & PRINT_MEMCPY_BW) {
ucs_arch_print_memcpy_limits(&ucs_global_opts.arch);
printf("# Memcpy bandwidth:\n");
for (size = 4096; size <= 256 * UCS_MBYTE; size *= 2) {
printf("# %10zu bytes: %.3f MB/s\n", size,
measure_memcpy_bandwidth(size) / UCS_MBYTE);
}
}
}