mirror of
https://github.com/sched-ext/scx.git
synced 2024-11-29 14:10:24 +00:00
adc01140aa
This prevents some warnings when building scx_qmap on 32-bit architectures. Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
|
|
* Copyright (c) 2022 Tejun Heo <tj@kernel.org>
|
|
* Copyright (c) 2022 David Vernet <dvernet@meta.com>
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <inttypes.h>
|
|
#include <signal.h>
|
|
#include <libgen.h>
|
|
#include <bpf/bpf.h>
|
|
#include <scx/common.h>
|
|
#include "scx_qmap.bpf.skel.h"
|
|
|
|
const char help_fmt[] =
|
|
"A simple five-level FIFO queue sched_ext scheduler.\n"
|
|
"\n"
|
|
"See the top-level comment in .bpf.c for more details.\n"
|
|
"\n"
|
|
"Usage: %s [-s SLICE_US] [-e COUNT] [-t COUNT] [-T COUNT] [-l COUNT] [-d PID] [-p]\n"
|
|
"\n"
|
|
" -s SLICE_US Override slice duration\n"
|
|
" -e COUNT Trigger scx_bpf_error() after COUNT enqueues\n"
|
|
" -t COUNT Stall every COUNT'th user thread\n"
|
|
" -T COUNT Stall every COUNT'th kernel thread\n"
|
|
" -l COUNT Trigger dispatch infinite looping after COUNT dispatches\n"
|
|
" -d PID Disallow a process from switching into SCHED_EXT (-1 for self)\n"
|
|
" -p Switch only tasks on SCHED_EXT policy intead of all\n"
|
|
" -h Display this help and exit\n";
|
|
|
|
static volatile int exit_req;
|
|
|
|
static void sigint_handler(int dummy)
|
|
{
|
|
exit_req = 1;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct scx_qmap *skel;
|
|
struct bpf_link *link;
|
|
int opt;
|
|
|
|
signal(SIGINT, sigint_handler);
|
|
signal(SIGTERM, sigint_handler);
|
|
|
|
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
|
|
|
|
skel = scx_qmap__open();
|
|
SCX_BUG_ON(!skel, "Failed to open skel");
|
|
|
|
while ((opt = getopt(argc, argv, "s:e:t:T:l:d:ph")) != -1) {
|
|
switch (opt) {
|
|
case 's':
|
|
skel->rodata->slice_ns = strtoull(optarg, NULL, 0) * 1000;
|
|
break;
|
|
case 'e':
|
|
skel->bss->test_error_cnt = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 't':
|
|
skel->rodata->stall_user_nth = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'T':
|
|
skel->rodata->stall_kernel_nth = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'l':
|
|
skel->rodata->dsp_inf_loop_after = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'd':
|
|
skel->rodata->disallow_tgid = strtol(optarg, NULL, 0);
|
|
if (skel->rodata->disallow_tgid < 0)
|
|
skel->rodata->disallow_tgid = getpid();
|
|
break;
|
|
case 'p':
|
|
skel->rodata->switch_partial = true;
|
|
break;
|
|
default:
|
|
fprintf(stderr, help_fmt, basename(argv[0]));
|
|
return opt != 'h';
|
|
}
|
|
}
|
|
|
|
SCX_BUG_ON(scx_qmap__load(skel), "Failed to load skel");
|
|
|
|
link = bpf_map__attach_struct_ops(skel->maps.qmap_ops);
|
|
SCX_BUG_ON(!link, "Failed to attach struct_ops");
|
|
|
|
while (!exit_req && !uei_exited(&skel->bss->uei)) {
|
|
long nr_enqueued = skel->bss->nr_enqueued;
|
|
long nr_dispatched = skel->bss->nr_dispatched;
|
|
|
|
printf("enq=%lu, dsp=%lu, delta=%ld, reenq=%" PRIu64 ", deq=%" PRIu64 ", core=%" PRIu64 "\n",
|
|
nr_enqueued, nr_dispatched, nr_enqueued - nr_dispatched,
|
|
skel->bss->nr_reenqueued, skel->bss->nr_dequeued,
|
|
skel->bss->nr_core_sched_execed);
|
|
fflush(stdout);
|
|
sleep(1);
|
|
}
|
|
|
|
bpf_link__destroy(link);
|
|
uei_print(&skel->bss->uei);
|
|
scx_qmap__destroy(skel);
|
|
return 0;
|
|
}
|