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From: "Wangnan (F)" <wangnan0@huawei.com>
To: Alexei Starovoitov <ast@plumgrid.com>, <acme@kernel.org>,
	<brendan.d.gregg@gmail.com>, <daniel@iogearbox.net>,
	<namhyung@kernel.org>, <masami.hiramatsu.pt@hitachi.com>,
	<paulus@samba.org>, <a.p.zijlstra@chello.nl>, <mingo@redhat.com>,
	<jolsa@kernel.org>, <dsahern@gmail.com>
Cc: <linux-kernel@vger.kernel.org>, <lizefan@huawei.com>,
	<hekuang@huawei.com>, <xiakaixu@huawei.com>, <pi3orama@163.com>
Subject: Re: [RFC PATCH v6 32/32] perf record: Add LLVM options for compiling BPF scripts
Date: Wed, 10 Jun 2015 08:17:09 +0800	[thread overview]
Message-ID: <55778205.2050401@huawei.com> (raw)
In-Reply-To: <55777E9E.1000808@plumgrid.com>



On 2015/6/10 8:02, Alexei Starovoitov wrote:
> On 6/8/15 10:50 PM, Wang Nan wrote:
>> Although previous patch allows setting BPF compiler related options in
>> perfconfig, on some ad-hoc situation it still requires passing options
>> through cmdline. This patch introduces 4 options to 'perf record' for
>> this propose: --clang-path, --clang-opt, --llc-path and --llc-opt.
>
> looks good. I hope only --clang will be used from time to time.

Right. Please see another mail I posted. I'd like to generate command using
command template instead of printf() in next version.

> Today, indeed, --llc* are needed too.
>

With template, --llc can be removed now.

> btw, our experimental libbpfprog.so (which is clang and llvm libs
> compiled into single .so with C api for compiling .c into bpf):
> $ ls -lh libbpfprog.so
> -rw-r--r-- 1 ast ast 31M Jun  9 16:49 libbpfprog.so
>
> not tiny, but I think we should be able to include it into perf,
> then perf will only have build dependencies on llvm instead of
> run-time dependencies.
> We'll release this lib as soon as it's a bit more stable.
>

Could you please give me some URL to LLVM git repositories so I can
track your work on it?

Thank you.


  reply	other threads:[~2015-06-10  0:18 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-09  5:50 [RFC PATCH v6 00/32] perf tools: filtering events using eBPF programs Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 01/32] tools build: Add feature check for eBPF API Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 02/32] bpf tools: Introduce 'bpf' library to tools Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 03/32] bpf tools: Allow caller to set printing function Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 04/32] bpf tools: Open eBPF object file and do basic validation Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 05/32] bpf tools: Read eBPF object from buffer Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 06/32] bpf tools: Check endianess and make libbpf fail early Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 07/32] bpf tools: Iterate over ELF sections to collect information Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 08/32] bpf tools: Collect version and license from ELF sections Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 09/32] bpf tools: Collect map definitions from 'maps' section Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 10/32] bpf tools: Collect symbol table from SHT_SYMTAB section Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 11/32] bpf tools: Collect eBPF programs from their own sections Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 12/32] bpf tools: Collect relocation sections from SHT_REL sections Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 13/32] bpf tools: Record map accessing instructions for each program Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 14/32] bpf tools: Add bpf.c/h for common bpf operations Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 15/32] bpf tools: Create eBPF maps defined in an object file Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 16/32] bpf tools: Relocate eBPF programs Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 17/32] bpf tools: Introduce bpf_load_program() to bpf.c Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 18/32] bpf tools: Load eBPF programs in object files into kernel Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 19/32] bpf tools: Introduce accessors for struct bpf_program Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 20/32] bpf tools: Introduce accessors for struct bpf_object Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 21/32] bpf tools: Link all bpf objects onto a list Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 22/32] perf tools: Make perf depend on libbpf Wang Nan
2015-06-09 10:29   ` Wangnan (F)
2015-06-09  5:50 ` [RFC PATCH v6 23/32] perf record: Enable passing bpf object file to --event Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 24/32] perf record: Compile scriptlets if pass '.c' " Wang Nan
2015-06-09 21:48   ` Alexei Starovoitov
2015-06-10  0:06     ` Wangnan (F)
2015-06-10  0:28       ` Alexei Starovoitov
2015-06-11  7:19       ` Namhyung Kim
2015-06-11  7:35         ` Wangnan (F)
2015-06-11 17:42           ` Alexei Starovoitov
2015-06-09  5:50 ` [RFC PATCH v6 25/32] perf tools: Add 'bpf.' config section to perf default config Wang Nan
2015-06-09 23:43   ` Alexei Starovoitov
2015-06-10  0:47     ` Wangnan (F)
2015-06-10  1:09       ` Alexei Starovoitov
2015-06-10  2:23         ` Wangnan (F)
2015-06-10  3:55           ` Alexei Starovoitov
2015-06-11  7:45     ` Namhyung Kim
2015-06-11  8:09       ` Wangnan (F)
2015-06-11 14:50         ` Namhyung Kim
2015-06-09  5:50 ` [RFC PATCH v6 26/32] perf tools: Parse probe points of eBPF programs during preparation Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 27/32] perf probe: Attach trace_probe_event with perf_probe_event Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 28/32] perf record: Probe at kprobe points Wang Nan
2015-06-11 14:32   ` Namhyung Kim
2015-06-09  5:50 ` [RFC PATCH v6 29/32] perf record: Load all eBPF object into kernel Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 30/32] perf tools: Add bpf_fd field to evsel and config it Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 31/32] perf tools: Attach eBPF program to perf event Wang Nan
2015-06-09  5:50 ` [RFC PATCH v6 32/32] perf record: Add LLVM options for compiling BPF scripts Wang Nan
2015-06-09 13:32   ` Wangnan (F)
2015-06-10  0:02   ` Alexei Starovoitov
2015-06-10  0:17     ` Wangnan (F) [this message]
2015-06-10  1:34       ` Alexei Starovoitov
2015-06-09 13:59 ` [RFC PATCH v6 00/32] perf tools: filtering events using eBPF programs Arnaldo Carvalho de Melo
2015-06-09 23:45   ` Wangnan (F)
2015-06-09 21:30 ` Alexei Starovoitov
2015-06-09 21:44   ` Arnaldo Carvalho de Melo
2015-06-09 23:16     ` Alexei Starovoitov

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