7c9441066a
Add a snippet of pyperf bpf program used to collect python stack traces as a scale test for the verifier. At 189 loop iterations llvm 9.0 starts ignoring '#pragma unroll' and generates partially unrolled loop instead. Hence use 50, 100, and 180 loop iterations to stress test. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 Facebook
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#include <test_progs.h>
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static int libbpf_debug_print(enum libbpf_print_level level,
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const char *format, va_list args)
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{
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if (level != LIBBPF_DEBUG)
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return 0;
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if (!strstr(format, "verifier log"))
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return 0;
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return vfprintf(stderr, "%s", args);
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}
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static int check_load(const char *file, enum bpf_prog_type type)
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{
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struct bpf_prog_load_attr attr;
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struct bpf_object *obj = NULL;
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int err, prog_fd;
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memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
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attr.file = file;
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attr.prog_type = type;
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attr.log_level = 4;
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err = bpf_prog_load_xattr(&attr, &obj, &prog_fd);
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bpf_object__close(obj);
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if (err)
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error_cnt++;
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return err;
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}
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void test_bpf_verif_scale(void)
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{
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const char *scale[] = {
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"./test_verif_scale1.o", "./test_verif_scale2.o", "./test_verif_scale3.o"
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};
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const char *pyperf[] = {
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"./pyperf50.o", "./pyperf100.o", "./pyperf180.o"
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};
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int err, i;
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if (verifier_stats)
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libbpf_set_print(libbpf_debug_print);
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for (i = 0; i < ARRAY_SIZE(scale); i++) {
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err = check_load(scale[i], BPF_PROG_TYPE_SCHED_CLS);
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printf("test_scale:%s:%s\n", scale[i], err ? "FAIL" : "OK");
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}
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for (i = 0; i < ARRAY_SIZE(pyperf); i++) {
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err = check_load(pyperf[i], BPF_PROG_TYPE_RAW_TRACEPOINT);
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printf("test_scale:%s:%s\n", pyperf[i], err ? "FAIL" : "OK");
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}
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}
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