Skip to content

K
Kernel

openeuler / Kernel
1 年多 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 04 11月, 2020 1 次提交
  3. 14 10月, 2020 6 次提交
  5. 13 8月, 2020 1 次提交
  7. 10 7月, 2020 1 次提交
  9. 28 5月, 2020 1 次提交
    • A
      perf symbols: Fix debuginfo search for Ubuntu · 85afd355
      由 Adrian Hunter 提交于 
      Reportedly, from 19.10 Ubuntu has begun mixing up the location of some
debug symbol files, putting files expected to be in
/usr/lib/debug/usr/lib into /usr/lib/debug/lib instead. Fix by adding
another dso_binary_type.

Example on Ubuntu 20.04

  Before:

    $ perf record -e intel_pt//u uname
    Linux
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.030 MB perf.data ]
    $ perf script --call-trace | head -5
           uname 14003 [005] 15321.764958566:  cbr: 42 freq: 4219 MHz (156%)
           uname 14003 [005] 15321.764958566: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )          7f1e71cc4100
           uname 14003 [005] 15321.764961566: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )              7f1e71cc4df0
           uname 14003 [005] 15321.764961900: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )              7f1e71cc4e18
           uname 14003 [005] 15321.764963233: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )              7f1e71cc5128

  After:

    $ perf script --call-trace | head -5
           uname 14003 [005] 15321.764958566:  cbr: 42 freq: 4219 MHz (156%)
           uname 14003 [005] 15321.764958566: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )      _start
           uname 14003 [005] 15321.764961566: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )          _dl_start
           uname 14003 [005] 15321.764961900: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )          _dl_start
           uname 14003 [005] 15321.764963233: (/usr/lib/x86_64-linux-gnu/ld-2.31.so              )          _dl_start
Reported-by: NTravis Downs <travis.downs@gmail.com>
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200526155207.9172-1-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      85afd355
  11. 16 4月, 2020 1 次提交
    • J
      perf annotate: Add basic support for bpf_image · 3c29d448
      由 Jiri Olsa 提交于 
      Add the DSO_BINARY_TYPE__BPF_IMAGE dso binary type to recognize BPF
images that carry trampoline or dispatcher.

Upcoming patches will add support to read the image data, store it
within the BPF feature in perf.data and display it for annotation
purposes.

Currently we only display following message:

  # ./perf annotate bpf_trampoline_24456 --stdio
   Percent |      Source code & Disassembly of . for cycles (504  ...
  --------------------------------------------------------------- ...
           :       to be implemented
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Acked-by: NSong Liu <songliubraving@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@redhat.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200312195610.346362-16-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      3c29d448
  13. 20 11月, 2019 1 次提交
    • A
      perf dso: Move dso_id from 'struct map' to 'struct dso' · 0e3149f8
      由 Arnaldo Carvalho de Melo 提交于 
      And take it into account when looking up DSOs when we have the dso_id
fields obtained from somewhere, like from PERF_RECORD_MMAP2 records.

Instances of struct map pointing to the same DSO pathname but with
anything in dso_id different are in fact different DSOs, so better have
different 'struct dso' instances to reflect that. At some point we may
want to get copies of the contents of the different objects if we want
to do correct annotation or other analysis.

With this we get 'struct map' 24 bytes leaner:

  $ pahole -C map ~/bin/perf
  struct map {
  	union {
  		struct rb_node     rb_node __attribute__((__aligned__(8))); /*     0    24 */
  		struct list_head   node;                 /*     0    16 */
  	} __attribute__((__aligned__(8)));               /*     0    24 */
  	u64                        start;                /*    24     8 */
  	u64                        end;                  /*    32     8 */
  	_Bool                      erange_warned:1;      /*    40: 0  1 */
  	_Bool                      priv:1;               /*    40: 1  1 */

  	/* XXX 6 bits hole, try to pack */
  	/* XXX 3 bytes hole, try to pack */

  	u32                        prot;                 /*    44     4 */
  	u64                        pgoff;                /*    48     8 */
  	u64                        reloc;                /*    56     8 */
  	/* --- cacheline 1 boundary (64 bytes) --- */
  	u64                        (*map_ip)(struct map *, u64); /*    64     8 */
  	u64                        (*unmap_ip)(struct map *, u64); /*    72     8 */
  	struct dso *               dso;                  /*    80     8 */
  	refcount_t                 refcnt;               /*    88     4 */
  	u32                        flags;                /*    92     4 */

  	/* size: 96, cachelines: 2, members: 13 */
  	/* sum members: 92, holes: 1, sum holes: 3 */
  	/* sum bitfield members: 2 bits, bit holes: 1, sum bit holes: 6 bits */
  	/* forced alignments: 1 */
  	/* last cacheline: 32 bytes */
  } __attribute__((__aligned__(8)));
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-g4hxxmraplo7wfjmk384mfsb@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0e3149f8
  15. 07 11月, 2019 2 次提交
  17. 01 9月, 2019 2 次提交
  19. 09 7月, 2019 2 次提交
  21. 02 7月, 2019 1 次提交
  23. 29 5月, 2019 4 次提交
  25. 20 3月, 2019 2 次提交
    • S
      perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO · 9b86d04d
      由 Song Liu 提交于 
      Introduce a new dso type DSO_BINARY_TYPE__BPF_PROG_INFO for BPF programs. In
symbol__disassemble(), DSO_BINARY_TYPE__BPF_PROG_INFO dso will call into a new
function symbol__disassemble_bpf() in an upcoming patch, where annotation line
information is filled based bpf_prog_info and btf saved in given perf_env.

Committer notes:

Removed the unnamed union with 'bpf_prog' and 'cache' in 'struct dso',
to fix this bug when exiting 'perf top':

  # perf top
  perf: Segmentation fault
  -------- backtrace --------
  perf[0x5a785a]
  /lib64/libc.so.6(+0x385bf)[0x7fd68443c5bf]
  perf(rb_first+0x2b)[0x4d6eeb]
  perf(dso__delete+0xb7)[0x4dffb7]
  perf[0x4f9e37]
  perf(perf_session__delete+0x64)[0x504df4]
  perf(cmd_top+0x1957)[0x454467]
  perf[0x4aad18]
  perf(main+0x61c)[0x42ec7c]
  /lib64/libc.so.6(__libc_start_main+0xf2)[0x7fd684428412]
  perf(_start+0x2d)[0x42eead]
  #
  # addr2line -fe ~/bin/perf 0x4dffb7
  dso_cache__free
  /home/acme/git/perf/tools/perf/util/dso.c:713

That is trying to access the dso->data.cache, and that is not used with
BPF programs, so we end up accessing what is in bpf_prog.first_member,
b00m.
Signed-off-by: NSong Liu <songliubraving@fb.com>
Reviewed-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/20190312053051.2690567-13-songliubraving@fb.com
[ split from a larger patch ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      9b86d04d
    • A
      perf report: Indicate JITed code better in report · a4e7e6ef
      由 Andi Kleen 提交于 
      Print [TID] tid %d instead of the crypted /tmp/perf-%d.map default.

% cat >loop.java
  public class loop {
          public static void main(String[] args)
          {
                  for (;;);
          }
  }
  ^D
  % javac loop.java
  % perf record java loop
  ^C

Before:

  % perf report --stdio
  ...
      56.09%  java     perf-34724.map      [.] 0x00007fd5bd021896
      19.12%  java     perf-34724.map      [.] 0x00007fd5bd021887
       9.79%  java     perf-34724.map      [.] 0x00007fd5bd021783
       8.97%  java     perf-34724.map      [.] 0x00007fd5bd02175b

After:

  % perf report --stdio
  ...
      56.09%  java     [JIT] tid 34724     [.] 0x00007fd5bd021896
      19.12%  java     [JIT] tid 34724     [.] 0x00007fd5bd021887
       9.79%  java     [JIT] tid 34724     [.] 0x00007fd5bd021783
       8.97%  java     [JIT] tid 34724     [.] 0x00007fd5bd02175b
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
LPU-Reference: 20190314225002.30108-7-andi@firstfloor.org
Link: https://lkml.kernel.org/n/tip-r17l6py9g0sezb7mi1f286gt@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a4e7e6ef
  27. 06 2月, 2019 1 次提交
  29. 25 1月, 2019 4 次提交
  31. 18 12月, 2018 2 次提交
  33. 20 8月, 2018 8 次提交