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  1. 02 1月, 2019 8 次提交
  3. 29 12月, 2018 13 次提交
    • J
      perf c2c: Increase the HITM ratio limit for displayed cachelines · c4a75bb9
      由 Jiri Olsa 提交于 
      The cachelines being reported are the ones with percentages all the way
down to 0.05%.  That makes for very long output files. Raising that to
0.1%.  The user can always specify --show-all if they want all the
cachelines with hits.
Suggested-by: NJoe Mario <jmario@redhat.com>
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20181228101820.28010-2-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      c4a75bb9
    • J
      perf c2c: Change the default coalesce setup · 423701a0
      由 Jiri Olsa 提交于 
      Joe suggested to have the coalesce default set just to 'iaddr', because
it's easier to read on the default 'perf c2c report' output.

By removing the "pid" field from the default -c/--coalesce option, the
'perf c2c' report will group all the relevant PIDs under the instruction
address ('iaddr') bucket. User can always run "-c pid,iaddr" for a more
fine grained output on particular PIDs.
Suggested-by: NJoe Mario <jmario@redhat.com>
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20181228101820.28010-1-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      423701a0
    • A
      perf trace beauty ioctl: Beautify USBDEVFS_ commands · 38fc9da6
      由 Arnaldo Carvalho de Melo 提交于 
      For instance, while debugging the 'galileo' python utility to
synchronize fitbit trackers:

  # perf trace -e ioctl ./run --force
  ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28666420) = 0
  ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
  ioctl(2</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
  ioctl(3</home/acme/hg/galileo/run>, TCSETS, 0x7ffe286663f0) = -1 ENOTTY (Inappropriate ioctl for device)
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286655a0) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665470) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665470) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286654a0) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286654a0) = 0
  ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665400) = 0
  ioctl(1</dev/pts/8>, TIOCSWINSZ, 0x7ffe286654c0) = 0
  ioctl(0</dev/pts/8>, TIOCSWINSZ, 0x7ffe28665560) = 0
  ioctl(0</dev/pts/8>, TIOCSWINSZ, 0x7ffe28665560) = 0
  ioctl(0</dev/pts/8>, TIOCMGET, 0x7ffe28665560) = 0
  ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28665530) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GET_CAPABILITIES, 0x561468dad048) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GETDRIVER, 0x7ffe28665500) = -1 ENODATA (No data available)
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GETDRIVER, 0x7ffe28665500) = -1 ENODATA (No data available)
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SETCONFIGURATION, 0x7ffe2866513c) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_CLAIMINTERFACE, 0x7ffe286647bc) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468dace40) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664c10) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664c10) = -1 EAGAIN (Resource temporarily unavailable)
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468dace40) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664dd0) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664dd0) = -1 EAGAIN (Resource temporarily unavailable)
  <SNIP>
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468e72ec0) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664cc0) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664cc0) = -1 EAGAIN (Resource temporarily unavailable)
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_RELEASEINTERFACE, 0x7ffe2866463c) = 0
  ioctl(10</dev/bus/usb/001/011>, USBDEVFS_RELEASEINTERFACE, 0x7ffe2866463c) = 0
  Tracker: 813F4690C3D1: Synchronisation successful
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-6x2cawak7jno3gpp5pagzj50@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      38fc9da6
    • A
      perf trace beauty: Export function to get the files for a thread · 2d473389
      由 Arnaldo Carvalho de Melo 提交于 
      So that beautifiers can access things like dev_maj.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-wm5o51f206c5pi063dsaeraq@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2d473389
    • A
      perf trace: Wire up ioctl's USBDEBFS_ cmd table generator · 86cf4c65
      由 Arnaldo Carvalho de Melo 提交于 
      That ends up generating this:

  [acme@quaco perf]$ cat /tmp/build/perf/trace/beauty/generated/ioctl/usbdevfs_ioctl_array.c
  static const char *usbdevfs_ioctl_cmds[] = {
	[0] = "CONTROL",
	[10] = "SUBMITURB",
	[11] = "DISCARDURB",
	[12] = "REAPURB",
	[13] = "REAPURBNDELAY",
	[14] = "DISCSIGNAL",
	[15] = "CLAIMINTERFACE",
	[16] = "RELEASEINTERFACE",
	[17] = "CONNECTINFO",
	[18] = "IOCTL",
	[19] = "HUB_PORTINFO",
	[2] = "BULK",
	[20] = "RESET",
	[21] = "CLEAR_HALT",
	[22] = "DISCONNECT",
	[23] = "CONNECT",
	[24] = "CLAIM_PORT",
	[25] = "RELEASE_PORT",
	[26] = "GET_CAPABILITIES",
	[27] = "DISCONNECT_CLAIM",
	[28] = "ALLOC_STREAMS",
	[29] = "FREE_STREAMS",
	[3] = "RESETEP",
	[30] = "DROP_PRIVILEGES",
	[31] = "GET_SPEED",
	[4] = "SETINTERFACE",
	[5] = "SETCONFIGURATION",
	[8] = "GETDRIVER",
  };

  #if 0
  static const char *usbdevfs_ioctl_32_cmds[] = {
	[0] = "CONTROL32",
	[10] = "SUBMITURB32",
	[12] = "REAPURB32",
	[13] = "REAPURBNDELAY32",
	[14] = "DISCSIGNAL32",
	[18] = "IOCTL32",
	[2] = "BULK32",
  };
  #endif
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-hkam6lt1g806l0p4b7buif3n@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      86cf4c65
    • A
      perf beauty ioctl: Add generator for USBDEVFS_ ioctl commands · 870c3f40
      由 Arnaldo Carvalho de Melo 提交于 
      Will be associated with fds with the right device major.

  $ tools/perf/trace/beauty/usbdevfs_ioctl.sh
  static const char *usbdevfs_ioctl_cmds[] = {
	[0] = "CONTROL",
	[10] = "SUBMITURB",
	[11] = "DISCARDURB",
	[12] = "REAPURB",
	[13] = "REAPURBNDELAY",
	[14] = "DISCSIGNAL",
	[15] = "CLAIMINTERFACE",
	[16] = "RELEASEINTERFACE",
	[17] = "CONNECTINFO",
	[18] = "IOCTL",
	[19] = "HUB_PORTINFO",
	[20] = "RESET",
	[21] = "CLEAR_HALT",
	[22] = "DISCONNECT",
	[23] = "CONNECT",
	[24] = "CLAIM_PORT",
	[25] = "RELEASE_PORT",
	[26] = "GET_CAPABILITIES",
	[27] = "DISCONNECT_CLAIM",
	[28] = "ALLOC_STREAMS",
	[29] = "FREE_STREAMS",
	[2] = "BULK",
	[30] = "DROP_PRIVILEGES",
	[31] = "GET_SPEED",
	[3] = "RESETEP",
	[4] = "SETINTERFACE",
	[5] = "SETCONFIGURATION",
	[8] = "GETDRIVER",
  };

  #if 0
  static const char *usbdevfs_ioctl_32_cmds[] = {
	[0] = "CONTROL32",
	[10] = "SUBMITURB32",
	[12] = "REAPURB32",
	[13] = "REAPURBNDELAY32",
	[14] = "DISCSIGNAL32",
	[18] = "IOCTL32",
	[2] = "BULK32",
  };
  #endif
  $

Leaving the '32' variants commented, later we can try to support those
as well, from some other hint (maybe something about the thread issuing
the ioctls) and from the _IOC_SIZE(cmd).

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-neq1lrji5k4ku0rktn7ytnri@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      870c3f40
    • A
      tools headers uapi: Grab a copy of usbdevice_fs.h · 2bd71d11
      由 Arnaldo Carvalho de Melo 提交于 
      Will be used to generate the string table for the USBDEVFS_ prefixed
ioctl commands.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-3vrm9b55tdhzn8sw9qazh4z5@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2bd71d11
    • A
      perf trace: Store the major number for a file when storing its pathname · 4bcc4cff
      由 Arnaldo Carvalho de Melo 提交于 
      We keep a table for the fds to map them back to pathnames when showing
'fd' based APIs such as write(), store as well the major number for the
device the path is in, to use in things like choosing the right ioctl
'cmd' beautifier.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-qjkds7bnk7v7fk2xhqsb0a4v@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4bcc4cff
    • A
      perf trace: Move the files table resizing to outside set_pathname() · d7e13484
      由 Arnaldo Carvalho de Melo 提交于 
      So that we can have that table expanded when setting other attributes.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-hzvpe3qwafe6sqcq3bhtbxds@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      d7e13484
    • A
      perf trace: Rename thread_thread->paths to thread_trace->files · f4a74fcb
      由 Arnaldo Carvalho de Melo 提交于 
      So that we can add more per file attributes besides the pathname, such
as which ioctl beautifier to use, for cases such as the sound and
usbdeffs ioctls, that both use the 'U' command, so we have to
differentiate at the major number for the device file.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-1895cmhrdz2dkl5prf2cj2yj@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f4a74fcb
    • A
      perf script: Fix LBR skid dump problems in brstackinsn · 61f61159
      由 Andi Kleen 提交于 
      This is a fix for another instance of the skid problem Milian recently
found [1]

The LBRs don't freeze at the exact same time as the PMI is triggered.
The perf script brstackinsn code that dumps LBR assembler assumes that
the last branch in the LBR leads to the sample point.  But with skid
it's possible that the CPU executes one or more branches before the
sample, but which do not appear in the LBR.

What happens then is either that the sample point is before the last LBR
branch. In this case the dumper sees a negative length and ignores it.
Or it the sample point is long after the last branch. Then the dumper
sees a very long block and dumps it upto its block limit (16k bytes),
which is noise in the output.

On typical sample session this can happen regularly.

This patch tries to detect and handle the situation. On the last block
that is dumped by the LBR dumper we always stop on the first branch. If
the block length is negative just scan forward to the first branch.
Otherwise scan until a branch is found.

The PT decoder already has a function that uses the instruction decoder
to detect branches, so we can just reuse it here.

Then when a terminating branch is found print an indication and stop
dumping. This might miss a few instructions, but at least shows no
runaway blocks.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Link: http://lkml.kernel.org/r/20181120050617.4119-1-andi@firstfloor.org
[ Resolved conflict with dd2e18e9 ("perf tools: Support 'srccode' output") ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      61f61159
    • J
      perf python: Do not force closing original perf descriptor in evlist.get_pollfd() · a389aece
      由 Jiri Olsa 提交于 
      Ondřej reported that when compiled with python3, the python extension
regresses in evlist.get_pollfd function behaviour.

The evlist.get_pollfd function creates file objects from evlist's fds
and returns them in a list. The python3 version also sets them to 'close
the original descriptor' when the object dies (is closed), by passing
True via the 'closefd' arg in the PyFile_FromFd call.

The python's closefd doc says:

  If closefd is False, the underlying file descriptor will be kept open
  when the file is closed.

That's why the following line in python3 closes all evlist fds:

  evlist.get_pollfd()

the returned list is immediately destroyed and that takes down the
original events fds.

Passing closefd as False to PyFile_FromFd to fix this.
Reported-by: NOndřej Lysoněk <olysonek@redhat.com>
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jaroslav Škarvada <jskarvad@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 66dfdff0 ("perf tools: Add Python 3 support")
Link: http://lkml.kernel.org/r/20181226112121.5285-1-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a389aece
    • C
      perf trace: Use correct SECCOMP prefix spelling, "SECOMP_*" -> "SECCOMP_*" · fbe7e425
      由 Colin Ian King 提交于 
      The spelling of the SECCOMP is incorrect, fix these.
Signed-off-by: NColin King <colin.king@canonical.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-janitors@vger.kernel.org
Fixes: c65c83ff ("perf trace: Allow asking for not suppressing common string prefixes")
Link: http://lkml.kernel.org/r/20181221084809.6108-1-colin.king@canonical.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fbe7e425
  5. 21 12月, 2018 4 次提交
    • A
      perf trace: Do not hardcode the size of the tracepoint common_ fields · b9b6a2ea
      由 Arnaldo Carvalho de Melo 提交于 
      We shouldn't hardcode the size of the tracepoint common_ fields, use the
offset of the 'id'/'__syscallnr' field in the sys_enter event instead.

This caused the augmented syscalls code to fail on a particular build of a
PREEMPT_RT_FULL kernel where these extra 'common_migrate_disable' and
'common_padding' fields were before the syscall id one:

  # cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/format
  name: sys_enter
  ID: 22
  format:
	field:unsigned short common_type;	offset:0;	size:2;	signed:0;
	field:unsigned char common_flags;	offset:2;	size:1;	signed:0;
	field:unsigned char common_preempt_count;	offset:3;	size:1;	signed:0;
	field:int common_pid;	offset:4;	size:4;	signed:1;
	field:unsigned short common_migrate_disable;	offset:8;	size:2;	signed:0;
	field:unsigned short common_padding;	offset:10;	size:2;	signed:0;

	field:long id;	offset:16;	size:8;	signed:1;
	field:unsigned long args[6];	offset:24;	size:48;	signed:0;

  print fmt: "NR %ld (%lx, %lx, %lx, %lx, %lx, %lx)", REC->id, REC->args[0], REC->args[1], REC->args[2], REC->args[3], REC->args[4], REC->args[5]
  #

All those 'common_' prefixed fields are zeroed when they hit a BPF tracepoint
hook, we better just discard those, i.e. somehow pass an offset to the
BPF program from the start of the ctx and make adjustments in the 'perf trace'
handlers to adjust the offset of the syscall arg offsets obtained from tracefs.

Till then, fix it the quick way and add this to the augmented_raw_syscalls.c to
bet it to work in such kernels:

  diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c
  index 53c233370fae..1f746f931e13 100644
  --- a/tools/perf/examples/bpf/augmented_raw_syscalls.c
  +++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c
  @@ -38,12 +38,14 @@ struct bpf_map SEC("maps") syscalls = {

   struct syscall_enter_args {
          unsigned long long common_tp_fields;
  +       long               rt_common_tp_fields;
          long               syscall_nr;
          unsigned long      args[6];
   };

   struct syscall_exit_args {
          unsigned long long common_tp_fields;
  +       long               rt_common_tp_fields;
          long               syscall_nr;
          long               ret;
   };

Just to check that this was the case. Fix it properly later, for now remove the
hardcoding of the offset in the 'perf trace' side and document the situation
with this patch.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-2pqavrktqkliu5b9nzouio21@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b9b6a2ea
    • S
      perf build: Don't unconditionally link the libbfd feature test to -liberty and -lz · 14541b1e
      由 Stanislav Fomichev 提交于 
      Current libbfd feature test unconditionally links against -liberty and -lz.
While it's required on some systems (e.g. opensuse), it's completely
unnecessary on the others, where only -lbdf is sufficient (debian).
This patch streamlines (and renames) the following feature checks:

feature-libbfd           - only link against -lbfd (debian),
                           see commit 2cf90407 ("perf tools: Fix bfd
			   dependency libraries detection")
feature-libbfd-liberty   - link against -lbfd and -liberty
feature-libbfd-liberty-z - link against -lbfd, -liberty and -lz (opensuse),
                           see commit 280e7c48 ("perf tools: fix BFD
			   detection on opensuse")

(feature-liberty{,-z} were renamed to feature-libbfd-liberty{,z}
for clarity)

The main motivation is to fix this feature test for bpftool which is
currently broken on debian (libbfd feature shows OFF, but we still
unconditionally link against -lbfd and it works).

Tested on debian with only -lbfd installed (without -liberty); I'd
appreciate if somebody on the other systems can test this new detection
method.
Signed-off-by: NStanislav Fomichev <sdf@google.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/4dfc634cfcfb236883971b5107cf3c28ec8a31be.1542328222.git.sdf@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      14541b1e
    • A
      perf beauty mmap: PROT_WRITE should come before PROT_EXEC · 5ce29d52
      由 Arnaldo Carvalho de Melo 提交于 
      To match strace output:

  # cat mmap.c
  #include <sys/mman.h>

  int main(void)
  {
	  mmap(0, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
	  return 0;
  }
  # strace -e mmap ./mmap |& grep -v ^+++
  mmap(NULL, 103484, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f5bae400000
  mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bae3fe000
  mmap(NULL, 3889792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5bade40000
  mmap(0x7f5bae1ec000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ac000) = 0x7f5bae1ec000
  mmap(0x7f5bae1f2000, 14976, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f5bae1f2000
  mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bae419000
  # trace -e mmap ./mmap |& grep -v ^+++
  mmap(NULL, 103484, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6646c25000
  mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f6646c23000
  mmap(NULL, 3889792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6646665000
  mmap(0x7f6646a11000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ac000) = 0x7f6646a11000
  mmap(0x7f6646a17000, 14976, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS) = 0x7f6646a17000
  mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f6646c3e000
  #
Reported-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-nt49d6iqle80cw8f529ovaqi@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      5ce29d52
    • A
      perf trace: Check if the raw_syscalls:sys_{enter,exit} are setup before setting tp filter · f76214f9
      由 Arnaldo Carvalho de Melo 提交于 
      While updating 'perf trace' on an machine with an old precompiled
augmented_raw_syscalls.o that didn't setup the syscall map the new 'perf
trace' codebase notices the augmented_raw_syscalls.o eBPF event, decides
to use it instead of the old raw_syscalls:sys_{enter,exit} method, but
then because we don't have the syscall map tries to set the tracepoint
filter on the sys_{enter,exit} evsels, that are NULL, segfaulting.

Make the code more robust by checking it those tracepoints have
their respective evsels in place before trying to set the tp filter.

With this we still get everything to work, just not setting up the
syscall filters, which is better than a segfault. Now to update the
precompiled augmented_raw_syscalls.o and continue development :-)

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-3ft5rjdl05wgz2pwpx2z8btu@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f76214f9
  7. 19 12月, 2018 15 次提交