1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2024 Emil Tsalapatis <etsal@meta.com>
* Copyright (c) 2024 Tejun Heo <tj@kernel.org>
* Copyright (c) 2022 David Vernet <dvernet@meta.com>
*/
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <libgen.h>
#include <bpf/bpf.h>
#include <scx/common.h>
#include "scx_sdt.h"
#include "scx_sdt.bpf.skel.h"
const char help_fmt[] =
"A simple arena-based sched_ext scheduler.\n"
"\n"
"Modified version of scx_simple that demonstrates arena-based data structures.\n"
"\n"
"Usage: %s [-f] [-v]\n"
"\n"
" -v Print libbpf debug messages\n"
" -h Display this help and exit\n";
static bool verbose;
static volatile int exit_req;
static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
{
if (level == LIBBPF_DEBUG && !verbose)
return 0;
return vfprintf(stderr, format, args);
}
static void sigint_handler(int sig)
{
exit_req = 1;
}
int main(int argc, char **argv)
{
struct scx_sdt *skel;
struct bpf_link *link;
__u32 opt;
__u64 ecode;
libbpf_set_print(libbpf_print_fn);
signal(SIGINT, sigint_handler);
signal(SIGTERM, sigint_handler);
restart:
optind = 1;
skel = SCX_OPS_OPEN(sdt_ops, scx_sdt);
while ((opt = getopt(argc, argv, "vh")) != -1) {
switch (opt) {
case 'v':
verbose = true;
break;
default:
fprintf(stderr, help_fmt, basename(argv[0]));
return opt != 'h';
}
}
SCX_OPS_LOAD(skel, sdt_ops, scx_sdt, uei);
link = SCX_OPS_ATTACH(skel, sdt_ops, scx_sdt);
while (!exit_req && !UEI_EXITED(skel, uei)) {
printf("====SCHEDULING STATS====\n");
printf("enqueues=%llu\t", skel->bss->stat_enqueue);
printf("inits=%llu\t", skel->bss->stat_init);
printf("exits=%llu\t", skel->bss->stat_exit);
printf("\n");
printf("select_idle_cpu=%llu\t", skel->bss->stat_select_idle_cpu);
printf("select_busy_cpu=%llu\t", skel->bss->stat_select_busy_cpu);
printf("\n");
printf("====ALLOCATION STATS====\n");
printf("chunk allocs=%llu\t", skel->bss->alloc_stats.chunk_allocs);
printf("data_allocs=%llu\n", skel->bss->alloc_stats.data_allocs);
printf("alloc_ops=%llu\t", skel->bss->alloc_stats.alloc_ops);
printf("free_ops=%llu\t", skel->bss->alloc_stats.free_ops);
printf("active_allocs=%llu\t", skel->bss->alloc_stats.active_allocs);
printf("arena_pages_used=%llu\t", skel->bss->alloc_stats.arena_pages_used);
printf("\n\n");
fflush(stdout);
sleep(1);
}
bpf_link__destroy(link);
ecode = UEI_REPORT(skel, uei);
scx_sdt__destroy(skel);
if (UEI_ECODE_RESTART(ecode))
goto restart;
return 0;
}
|
