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Wed, 8 May 2019 21:49:38 +0000 Received: from MWHPR15MB1165.namprd15.prod.outlook.com ([fe80::85b5:614:bc49:8a15]) by MWHPR15MB1165.namprd15.prod.outlook.com ([fe80::85b5:614:bc49:8a15%11]) with mapi id 15.20.1856.012; Wed, 8 May 2019 21:49:38 +0000 From: Song Liu To: Jiri Olsa CC: Arnaldo Carvalho de Melo , Jesper Dangaard Brouer , Alexei Starovoitov , Daniel Borkmann , lkml , Ingo Molnar , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Stanislav Fomichev , Adrian Hunter , Andi Kleen Subject: Re: [PATCHv3 00/12] perf tools: Display eBPF code in intel_pt trace Thread-Topic: [PATCHv3 00/12] perf tools: Display eBPF code in intel_pt trace Thread-Index: AQHVBaDLGInQFITT8kuKFJfOJGE2cqZhxJqA Date: Wed, 8 May 2019 21:49:38 +0000 Message-ID: <2D67A146-0AE0-44A5-8659-55E7975EB67C@fb.com> References: <20190508132010.14512-1-jolsa@kernel.org> In-Reply-To: <20190508132010.14512-1-jolsa@kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3445.104.8) x-originating-ip: [2620:10d:c090:180::263b] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: ba4fbb41-a30e-417d-5e2a-08d6d3ff11cb x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(2017052603328)(7193020);SRVR:MWHPR15MB1566; 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charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: ba4fbb41-a30e-417d-5e2a-08d6d3ff11cb X-MS-Exchange-CrossTenant-originalarrivaltime: 08 May 2019 21:49:38.6174 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR15MB1566 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-08_12:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905080131 X-FB-Internal: deliver Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On May 8, 2019, at 6:19 AM, Jiri Olsa wrote: >=20 > hi, > this patchset adds dso support to read and display > bpf code in intel_pt trace output. I had to change > some of the kernel maps processing code, so hopefully > I did not break too many things ;-) >=20 > It's now possible to see bpf code flow via: >=20 > # perf-with-kcore record pt -e intel_pt//ku -- sleep 1 > # perf-with-kcore script pt --insn-trace --xed > ... > sleep 36660 [016] 1057036.806464404: ffffffff811dfba5 trace_ca= ll_bpf+0x65 ([kernel.kallsyms]) nopl %eax, (%rax,%rax,1) > sleep 36660 [016] 1057036.806464404: ffffffff811dfbaa trace_ca= ll_bpf+0x6a ([kernel.kallsyms]) movq 0x30(%rbx), %rax > sleep 36660 [016] 1057036.806464404: ffffffff811dfbae trace_ca= ll_bpf+0x6e ([kernel.kallsyms]) leaq 0x38(%rbx), %rsi > sleep 36660 [016] 1057036.806464404: ffffffff811dfbb2 trace_ca= ll_bpf+0x72 ([kernel.kallsyms]) mov %r13, %rdi > sleep 36660 [016] 1057036.806464404: ffffffff811dfbb5 trace_ca= ll_bpf+0x75 ([kernel.kallsyms]) callq 0xffffffff81c00c30 > sleep 36660 [016] 1057036.806464404: ffffffff81c00c30 __x86_in= direct_thunk_rax+0x0 ([kernel.kallsyms]) callq 0xffffffff81c0= 0c3c > sleep 36660 [016] 1057036.806464404: ffffffff81c00c3c __x86_in= direct_thunk_rax+0xc ([kernel.kallsyms]) movq %rax, (%rsp) > sleep 36660 [016] 1057036.806464404: ffffffff81c00c40 __x86_in= direct_thunk_rax+0x10 ([kernel.kallsyms]) retq > sleep 36660 [016] 1057036.806464725: ffffffffa05e89ef bpf_prog= _da4fe6b3d2c29b25_trace_return+0x0 (bpf_prog_da4fe6b3d2c29b25_trace_return)= pushq %rbp > sleep 36660 [016] 1057036.806464725: ffffffffa05e89f0 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x1 (bpf_prog_da4fe6b3d2c29b25_trace_return)= mov %rsp, %rbp > sleep 36660 [016] 1057036.806464725: ffffffffa05e89f3 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x4 (bpf_prog_da4fe6b3d2c29b25_trace_return)= sub $0x158, %rsp > sleep 36660 [016] 1057036.806464725: ffffffffa05e89fa bpf_prog= _da4fe6b3d2c29b25_trace_return+0xb (bpf_prog_da4fe6b3d2c29b25_trace_return)= sub $0x28, %rbp > sleep 36660 [016] 1057036.806464725: ffffffffa05e89fe bpf_prog= _da4fe6b3d2c29b25_trace_return+0xf (bpf_prog_da4fe6b3d2c29b25_trace_return)= movq %rbx, (%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a02 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x13 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %r13, 0x8(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a06 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x17 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %r14, 0x10(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a0a bpf_prog= _da4fe6b3d2c29b25_trace_return+0x1b (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %r15, 0x18(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a0e bpf_prog= _da4fe6b3d2c29b25_trace_return+0x1f (bpf_prog_da4fe6b3d2c29b25_trace_return= ) xor %eax, %eax > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a10 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x21 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %rax, 0x20(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a14 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x25 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) mov %rdi, %rbx > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a17 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x28 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) callq 0xffffffff811fed50 > sleep 36660 [016] 1057036.806464725: ffffffff811fed50 bpf_get_= current_pid_tgid+0x0 ([kernel.kallsyms]) nopl %eax, (%rax,%ra= x,1) > sleep 36660 [016] 1057036.806464725: ffffffff811fed55 bpf_get_= current_pid_tgid+0x5 ([kernel.kallsyms]) movq %gs:0x15c00, %r= dx > sleep 36660 [016] 1057036.806464725: ffffffff811fed5e bpf_get_= current_pid_tgid+0xe ([kernel.kallsyms]) test %rdx, %rdx > sleep 36660 [016] 1057036.806464725: ffffffff811fed61 bpf_get_= current_pid_tgid+0x11 ([kernel.kallsyms]) jz 0xffffffff811fed79 > sleep 36660 [016] 1057036.806464725: ffffffff811fed63 bpf_get_= current_pid_tgid+0x13 ([kernel.kallsyms]) movsxdl 0x494(%rdx),= %rax > sleep 36660 [016] 1057036.806464725: ffffffff811fed6a bpf_get_= current_pid_tgid+0x1a ([kernel.kallsyms]) movsxdl 0x490(%rdx),= %rdx > sleep 36660 [016] 1057036.806464725: ffffffff811fed71 bpf_get_= current_pid_tgid+0x21 ([kernel.kallsyms]) shl $0x20, %rax > sleep 36660 [016] 1057036.806464725: ffffffff811fed75 bpf_get_= current_pid_tgid+0x25 ([kernel.kallsyms]) or %rdx, %rax > sleep 36660 [016] 1057036.806464725: ffffffff811fed78 bpf_get_= current_pid_tgid+0x28 ([kernel.kallsyms]) retq > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a1c bpf_prog= _da4fe6b3d2c29b25_trace_return+0x2d (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %rax, -0x8(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a20 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x31 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) xor %edi, %edi > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a22 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x33 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %rdi, -0x10(%rbp) > sleep 36660 [016] 1057036.806464725: ffffffffa05e8a26 bpf_prog= _da4fe6b3d2c29b25_trace_return+0x37 (bpf_prog_da4fe6b3d2c29b25_trace_return= ) movq %rdi, -0x18(%rbp) >=20 > # perf-core/perf-with-kcore script pt --call-trace > ... > sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] = ) kretprobe_perf_func > sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] = ) trace_call_bpf > sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] = ) __x86_indirect_thunk_rax > sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] = ) __x86_indirect_thunk_rax > sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_get_current_pid_tgid > sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_ktime_get_ns > sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms] = ) __x86_indirect_thunk_ra= x > sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms] = ) __x86_indirect_thun= k_rax > sleep 36660 [016] 1057036.806465045: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) __htab_map_lookup_elem > sleep 36660 [016] 1057036.806465366: ([kernel.kallsyms] = ) memcmp > sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_probe_read > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) probe_kernel_read > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) __check_object_size > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) check_stack_obj= ect > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) copy_user_enhanced_= fast_string > sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_probe_read > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) probe_kernel_read > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) __check_object_size > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) check_stack_obj= ect > sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] = ) copy_user_enhanced_= fast_string > sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_get_current_uid_gid > sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms] = ) from_kgid > sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms] = ) from_kuid > sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25= _trace_return ) bpf_perf_event_output > sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] = ) perf_event_output > sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] = ) perf_prepare_sample > sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] = ) perf_misc_flags > sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] = ) __x86_indir= ect_thunk_rax > sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] = ) __x86_i= ndirect_thunk_rax >=20 >=20 > v3 changes: > - fix the padding code in patch 7 (Song Liu) > - rebased on current Arnaldo's perf/core with merged perf/urgent >=20 > v2 changes: > - fix missing pthread_mutex_unlock [Stanislav Fomichev] > - removed eBPF dso reusing [Adrian Hunter] > - merge eBPF and kcore maps [Adrian Hunter] > - few patches already applied > - added some perf script helper options > - patches are rebased on top of Arnaldo's perf/core with perf/urgent mer= ged in >=20 > It's also available in here: > git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git > perf/fixes >=20 > thanks, > jirka >=20 For the series:=20 Acked-by: Song Liu Thanks! >=20 > Cc: Jesper Dangaard Brouer > Cc: Alexei Starovoitov > Cc: Daniel Borkmann > --- > Jiri Olsa (12): > perf tools: Separate generic code in dso__data_file_size > perf tools: Separate generic code in dso_cache__read > perf tools: Simplify dso_cache__read function > perf tools: Add bpf dso read and size hooks > perf tools: Read also the end of the kernel > perf tools: Keep zero in pgoff bpf map > perf script: Pad dso name for --call-trace > perf tools: Preserve eBPF maps when loading kcore > perf tests: Add map_groups__merge_in test > perf script: Add --show-bpf-events to show eBPF related events > perf script: Remove superfluous bpf event titles > perf script: Add --show-all-events option >=20 > tools/include/linux/kernel.h | 1 + > tools/lib/vsprintf.c | 19 +++++++++++++++++++ > tools/perf/Documentation/perf-script.txt | 6 ++++++ > tools/perf/builtin-script.c | 56 ++++++++++++++++++++++++++= ++++++++++++++++++++++++++++++ > tools/perf/tests/Build | 1 + > tools/perf/tests/builtin-test.c | 4 ++++ > tools/perf/tests/map_groups.c | 120 ++++++++++++++++++++++++++= +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++= +++++++++++++++++++ > tools/perf/tests/tests.h | 1 + > tools/perf/util/dso.c | 125 ++++++++++++++++++++++++++= +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------= ------------------------ > tools/perf/util/event.c | 4 ++-- > tools/perf/util/machine.c | 31 ++++++++++++++++++++------= ----- > tools/perf/util/map.c | 6 ++++++ > tools/perf/util/map_groups.h | 2 ++ > tools/perf/util/symbol.c | 97 ++++++++++++++++++++++++++= +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---- > tools/perf/util/symbol_conf.h | 1 + > 15 files changed, 421 insertions(+), 53 deletions(-) > create mode 100644 tools/perf/tests/map_groups.c