17c944106SAlexei Starovoitov // SPDX-License-Identifier: GPL-2.0 27c944106SAlexei Starovoitov // Copyright (c) 2019 Facebook 37c944106SAlexei Starovoitov #define STACK_MAX_LEN 180 4*d14ea4b0SYonghong Song 5*d14ea4b0SYonghong Song /* llvm upstream commit at clang18 6*d14ea4b0SYonghong Song * https://github.com/llvm/llvm-project/commit/1a2e77cf9e11dbf56b5720c607313a566eebb16e 7*d14ea4b0SYonghong Song * changed inlining behavior and caused compilation failure as some branch 8*d14ea4b0SYonghong Song * target distance exceeded 16bit representation which is the maximum for 9*d14ea4b0SYonghong Song * cpu v1/v2/v3. Macro __BPF_CPU_VERSION__ is later implemented in clang18 10*d14ea4b0SYonghong Song * to specify which cpu version is used for compilation. So a smaller 11*d14ea4b0SYonghong Song * unroll_count can be set if __BPF_CPU_VERSION__ is less than 4, which 12*d14ea4b0SYonghong Song * reduced some branch target distances and resolved the compilation failure. 13*d14ea4b0SYonghong Song * 14*d14ea4b0SYonghong Song * To capture the case where a developer/ci uses clang18 but the corresponding 15*d14ea4b0SYonghong Song * repo checkpoint does not have __BPF_CPU_VERSION__, a smaller unroll_count 16*d14ea4b0SYonghong Song * will be set as well to prevent potential compilation failures. 17*d14ea4b0SYonghong Song */ 18*d14ea4b0SYonghong Song #ifdef __BPF_CPU_VERSION__ 19*d14ea4b0SYonghong Song #if __BPF_CPU_VERSION__ < 4 20*d14ea4b0SYonghong Song #define UNROLL_COUNT 90 21*d14ea4b0SYonghong Song #endif 22*d14ea4b0SYonghong Song #elif __clang_major__ == 18 23*d14ea4b0SYonghong Song #define UNROLL_COUNT 90 24*d14ea4b0SYonghong Song #endif 25*d14ea4b0SYonghong Song 267c944106SAlexei Starovoitov #include "pyperf.h" 27