便笺

源代码检索/图谱

• 内核路线图：Interactive map of Linux kernel
• 在线检索源码/关键字（不限于 Linux，包括 glibc，llvm等）：Linux source code (v6.9.2) - Bootlin

Perf

使用

Linux perf Examples

问题

• create_tasks 中编译出错

  builtin-sched.c: In function ‘create_tasks’:
  /home/z/WorkSpace/SKDL0401_TE/kernel/tools/include/linux/kernel.h:43:24: error: comparison of distinct pointer types lacks a cast [-Werror]
     43 |         (void) (&_max1 == &_max2);              \
        |                        ^~
  builtin-sched.c:673:34: note: in expansion of macro ‘max’
    673 |                         (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
        |                                  ^~~

  解决：
  需要社区补丁：
  Diff - d08c84e01afa7a7eee6badab25d5420fa847f783^! - pub/scm/linux/kernel/git/tj/cgroup - Git at Google

Refer

调试技术之perf实战笔记
性能分析利器之perf浅析 | 学海无涯，行者无疆
Linux tracing/profiling 基础：符号表、调用栈、perf/bpftrace 示例等（2022）