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selftests/bpf: add realistic loop tests

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Add a bunch of loop tests. Most of them are created by replacing
'#pragma unroll' with '#pragma clang loop unroll(disable)'

Several tests are artificially large:
  /* partial unroll. llvm will unroll loop ~150 times.
   * C loop count -> 600.
   * Asm loop count -> 4.
   * 16k insns in loop body.
   * Total of 5 such loops. Total program size ~82k insns.
   */
  "./pyperf600.o",

  /* no unroll at all.
   * C loop count -> 600.
   * ASM loop count -> 600.
   * ~110 insns in loop body.
   * Total of 5 such loops. Total program size ~1500 insns.
   */
  "./pyperf600_nounroll.o",

  /* partial unroll. 19k insn in a loop.
   * Total program size 20.8k insn.
   * ~350k processed_insns
   */
  "./strobemeta.o",

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Alexei Starovoitov
2019-06-15 12:12:24 -07:00
committed by Daniel Borkmann
parent 0d3679e99a
commit b061017f8b
15 changed files with 1347 additions and 12 deletions
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10
tools/testing/selftests/bpf/progs/strobemeta.c Normal file
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@@ -0,0 +1,10 @@
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
// Copyright (c) 2019 Facebook
#define STROBE_MAX_INTS 2
#define STROBE_MAX_STRS 25
#define STROBE_MAX_MAPS 100
#define STROBE_MAX_MAP_ENTRIES 20
/* full unroll by llvm #undef NO_UNROLL */
#include "strobemeta.h"