Re: [RFC PATCH v2 00/37] perf tools: introduce 'perf bpf' command to load eBPF programs.

From: Ingo Molnar
Date: Fri May 15 2015 - 04:48:24 EST

* Wangnan (F) <wangnan0@xxxxxxxxxx> wrote:

> perf tools: Set vmlinux_path__nr_entries to 0 in vmlinux_path__exit
> tools lib traceevent: Install libtraceevent.a into libdir
> tools: Allow other override features to check

Hm, to check what? Not sure I can parse this sentence at a glance.

> tools: Add __aligned_u64 to types.h
> tools lib bpf: Introduce 'bpf' library to tools
> tools lib bpf: Allow set printing function
> tools lib bpf: Define basic interface

So you changed 'tools perf' to 'perf tools', but you should probably
find a better name for 'tools lib bpf' as well, say:

bpf tools: Define basic interface


> tools lib bpf: Open eBPF object file and do basic validation
> tools lib bpf: Check swap according to EHDR
> tools lib bpf: Iterater over elf sections to collect information



> tools lib bpf: Collect version and license from ELF

'ELF' is not a noun really. From ELF binaries? From ELF sections?

> tools lib bpf: Collect map definitions
> tools lib bpf: Collect config section in object
> tools lib bpf: Collect symbol table in object files
> tools lib bpf: Collect bpf programs from object files
> tools lib bpf: Collect relocation sections from object file
> tools lib bpf: Collect relocation instructions for each program
> tools lib bpf: Clean elf memory after loading
> tools lib bpf: Add bpf.c/h for common bpf operations
> tools lib bpf: Create maps needed by object file
> tools lib bpf: Relocate programs
> tools lib bpf: Introduce bpf_load_program to bpf.c


> tools lib bpf: Load bpf programs in object file into kernel
> tools lib bpf: Introduce accessors of bpf_program
> tools lib bpf: Introduce accessors for struct bpf_object

so 'of' bpf_program, but 'for' struct bpf_object?

> perf tools: Add new 'perf bpf' command
> perf tools: Make perf depend on libbpf
> perf bpf: Add 'perf bpf record' subcommand
> perf bpf: Add bpf-loader and open elf object files


> perf bpf: Collect all bpf programs
> perf bpf: Parse probe points of eBPF programs during prepartion


> perf bpf: Probe at kprobe points
> perf bpf: Load eBPF object into kernel
> perf tools: Add a bpf_wrapper global flag
> perf tools: Add bpf_fd field to evsel and introduce new event syntax
> perf bpf: Generate event argv for other commands
> perf bpf: Pass generated arguments to cmd_record



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