| /* |
| * Copyright © 2016 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| */ |
| |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <sys/ioctl.h> |
| #include <sys/resource.h> |
| #include <sys/time.h> |
| #include <time.h> |
| |
| #include "drm.h" |
| #include "ioctl_wrappers.h" |
| #include "drmtest.h" |
| #include "intel_io.h" |
| #include "igt_rand.h" |
| |
| #define CLOSE_DEVICE 0x1 |
| |
| static double elapsed(const struct timespec *start, |
| const struct timespec *end) |
| { |
| return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec); |
| } |
| |
| static int loop(int nobj, int ndev, int nage, int ncpus, unsigned flags) |
| { |
| uint32_t *handle; |
| double *results; |
| int parent; |
| int size; |
| int n; |
| |
| #if 0 |
| printf("nobj=%d, ndev=%d, nage=%d, ncpus=%d, flags=%x\n", |
| nobj, ndev, nage, ncpus, flags); |
| #endif |
| |
| parent = drm_open_driver(DRIVER_INTEL); |
| |
| size = ncpus * sizeof(*results); |
| size = (size + 4095) & -4096; |
| results = mmap(0, size, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0); |
| |
| handle = malloc(nobj * sizeof(*handle)); |
| for (n = 0; n < nobj; n++) |
| handle[n] = gem_create(parent, 4096); |
| |
| igt_fork(child, ncpus) { |
| struct timespec start, end; |
| unsigned long count = 0; |
| int *dev, *fd; |
| |
| hars_petruska_f54_1_random_perturb(child); |
| |
| fd = malloc(ndev * nage * sizeof(*fd)); |
| dev = malloc(ndev * sizeof(*dev)); |
| for (n = 0; n < ndev; n++) |
| dev[n] = drm_open_driver(DRIVER_INTEL); |
| memset(fd, 0xff, ndev * nage * sizeof(*fd)); |
| |
| clock_gettime(CLOCK_MONOTONIC, &start); |
| do { |
| for (n = 0; n < ndev; n++) { |
| int h = hars_petruska_f54_1_random_unsafe() % nobj; |
| int a = hars_petruska_f54_1_random_unsafe() % nage; |
| |
| if (!(flags & CLOSE_DEVICE)) { |
| int old = fd[n*nage + a]; |
| if (old != -1) { |
| gem_close(dev[n], prime_fd_to_handle(dev[n], old)); |
| close(old); |
| } |
| } |
| |
| fd[n*nage + a] = |
| prime_handle_to_fd(parent, handle[h]); |
| prime_fd_to_handle(dev[n], fd[n*nage + a]); |
| |
| if (flags & CLOSE_DEVICE) { |
| close(dev[n]); |
| dev[n] = drm_open_driver(DRIVER_INTEL); |
| } |
| } |
| |
| count++; |
| clock_gettime(CLOCK_MONOTONIC, &end); |
| } while (elapsed(&start, &end) < 2.); |
| results[child] = 1e6*elapsed(&start, &end) / (ndev * count); |
| } |
| igt_waitchildren(); |
| |
| results[ncpus] = 0; |
| for (n = 0; n < ncpus; n++) |
| results[ncpus] += results[n]; |
| printf("%.3f us\n", results[ncpus] / ncpus); |
| return 0; |
| } |
| |
| static bool allow_files(unsigned min) |
| { |
| struct rlimit rlim; |
| unsigned nofile_rlim = 1024*1024; |
| |
| FILE *file = fopen("/proc/sys/fs/file-max", "r"); |
| if (file) { |
| igt_assert(fscanf(file, "%u", &nofile_rlim) == 1); |
| igt_info("System limit for open files is %u\n", nofile_rlim); |
| fclose(file); |
| } |
| |
| if (min > nofile_rlim) |
| return false; |
| |
| if (getrlimit(RLIMIT_NOFILE, &rlim)) |
| return false; |
| |
| igt_info("Current file limit is %ld, estimated we need %d\n", |
| (long)rlim.rlim_cur, min); |
| |
| if (rlim.rlim_cur > min) |
| return true; |
| |
| rlim.rlim_cur = min; |
| rlim.rlim_max = min; |
| return setrlimit(RLIMIT_NOFILE, &rlim) == 0; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| unsigned flags = 0; |
| int ncpus = 1; |
| int ndev = 512; |
| int nobj = 32 << 10; |
| int nage = 1024; |
| int c; |
| |
| while ((c = getopt (argc, argv, "a:d:o:cf")) != -1) { |
| switch (c) { |
| case 'o': |
| nobj = atoi(optarg); |
| if (nobj < 1) |
| nobj = 1; |
| break; |
| |
| case 'd': |
| ndev = atoi(optarg); |
| if (ndev < 1) |
| ndev = 1; |
| break; |
| |
| case 'a': |
| nage = atoi(optarg); |
| if (nage < 1) |
| nage = 1; |
| break; |
| |
| case 'f': |
| ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
| break; |
| |
| case 'c': |
| flags |= CLOSE_DEVICE; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| if (!allow_files((nage + 1)*ndev + 1)) { |
| fprintf(stderr, "Unable to relax fd limit\n"); |
| exit(1); |
| } |
| |
| return loop(nobj, ndev, nage, ncpus, flags); |
| } |