- 30 4月, 2014 1 次提交
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由 Richard Yao 提交于
Modules installed outside of the kernel's build system should go into "%s/lib/modules/%s/extra", but at present, perf will only look at them when they are in "%s/lib/modules/%s/kernel". Lets encourage good citizenship by relaxing this requirement to "%s/lib/modules/%s". This way open source modules that are out-of-tree have no incentive to start populating a directory reserved for in-kernel modules and I can stop hex-editing my system's perf binary when profiling OSS out-of-tree modules. Feedback from Namhyung Kim correctly revealed that the hex-edits that I had been doing meant that perf was also traversing the build and source symlinks in %s/lib/modules/%s. That is undesireable, so we explicitly exclude them from traversal with a minor tweak to the traversal routine. Signed-off-by: NRichard Yao <ryao@gentoo.org> Acked-by: NNamhyung kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1398532675-13684-1-git-send-email-ryao@gentoo.orgSigned-off-by: NJiri Olsa <jolsa@kernel.org>
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- 20 4月, 2014 2 次提交
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由 Adrien BAK 提交于
In the current version, when using perf record, if something goes wrong in tools/perf/builtin-record.c:375 session = perf_session__new(file, false, NULL); The error message: "Not enough memory for reading per file header" is issued. This error message seems to be outdated and is not very helpful. This patch proposes to replace this error message by "Perf session creation failed" I believe this issue has been brought to lkml: https://lkml.org/lkml/2014/2/24/458 although this patch only tackles a (small) part of the issue. Additionnaly, this patch improves error reporting in tools/perf/util/data.c open_file_write. Currently, if the call to open fails, the user is unaware of it. This patch logs the error, before returning the error code to the caller. Reported-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NAdrien BAK <adrien.bak@metascale.org> Link: http://lkml.kernel.org/r/1397786443.3093.4.camel@beast [ Reorganize the changelog into paragraphs ] [ Added empty line after fd declaration in open_file_write ] Signed-off-by: NJiri Olsa <jolsa@redhat.com>
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由 Vladimir Nikulichev 提交于
pert-report doesn't resolve function names in VDSO: $ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% 0x7fff6b1fe861 __gettimeofday ACE_OS::gettimeofday() ... In this case symbol values should be adjusted the same way as for executables, relocatable objects and prelinked libraries. After fix: $ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% __vdso_gettimeofday __gettimeofday ACE_OS::gettimeofday() Signed-off-by: NVladimir Nikulichev <nvs@tbricks.com> Tested-by: NNamhyung Kim <namhyung@kernel.org> Reviewed-by: NAdrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/969812.163009436-sendEmail@nvsSigned-off-by: NJiri Olsa <jolsa@redhat.com>
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- 14 4月, 2014 3 次提交
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由 Namhyung Kim 提交于
The dwarf_getcfi() only checks .debug_frame section for CFI, but as most binaries only have .eh_frame it'd return NULL and it makes some variables inaccessible. Using dwarf_getcfi_elf (along with dwarf_getelf()) allows to show and add probe to more variables. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/1396854348-9296-1-git-send-email-namhyung@kernel.orgSigned-off-by: NJiri Olsa <jolsa@redhat.com>
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由 Masami Hiramatsu 提交于
As Namhyung reported(https://lkml.org/lkml/2014/4/1/89), current perf-probe -L option doesn't handle errors in line-range searching correctly. It causes a SEGV if an error occured in the line-range searching. ---- $ perf probe -x ./perf -v -L map__load Open Debuginfo file: /home/namhyung/project/linux/tools/perf/perf fname: util/map.c, lineno:153 New line range: 153 to 2147483647 path: (null) Segmentation fault (core dumped) ---- This is because line_range_inline_cb() ignores errors from find_line_range_by_line() which means that lr->path is already freed on the error path in find_line_range_by_line(). As a result, get_real_path() accesses the lr->path and it causes a NULL pointer exception. This fixes line_range_inline_cb() to handle the error correctly, and report it to the caller. Anyway, this just fixes a possible SEGV bug, Namhyung's patch is also required. Reported-by: NNamhyung Kim <namhyung@kernel.org> Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: NNamhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20140402054831.19080.27006.stgit@ltc230.yrl.intra.hitachi.co.jpSigned-off-by: NJiri Olsa <jolsa@redhat.com>
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由 Namhyung Kim 提交于
The commit 5a62257a ("perf probe: Replace line_list with intlist") replaced line_list to intlist but it has a problem that if a same line was added again, it'd return -EEXIST rather than 1. Since line_range_walk_cb() only checks the result being negative, it resulted in failure or segfault sometimes. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/1396327677-3657-1-git-send-email-namhyung@kernel.orgSigned-off-by: NJiri Olsa <jolsa@redhat.com>
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- 19 3月, 2014 9 次提交
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由 Ramkumar Ramachandra 提交于
Moreover, the corresponding function in include/linux/kernel.h is marked obsolete. Signed-off-by: NRamkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395176715-4465-1-git-send-email-artagnon@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Ramkumar Ramachandra 提交于
perf_event_open() was renamed to sys_perf_event_open(); update the debug messages to reflect this. Signed-off-by: NRamkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395169842-1399-1-git-send-email-artagnon@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Jiri Olsa 提交于
Because it's not used any more. Signed-off-by: NJiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1395154016-26709-3-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
So that when showing multiple events annotations, we can figure out which is which: # perf record -a -e instructions,cycles sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.826 MB perf.data (~36078 samples) ] # perf evlist instructions cycles # perf annotate intel_idle 2> /dev/null | head -1 Percent | Source code & Disassembly of vmlinux for instructions # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-n1r51l329434js84qtb2c6l9@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
Checking default guest machine should be done before allocating event structures otherwise it'll leak memory. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Link: http://lkml.kernel.org/r/87ob15tx6a.fsf@sejong.aot.lge.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Don Zickus 提交于
Now that we can properly synthesize threads system-wide, make sure the mmap and mmap2 events use tids instead of pids to locate their maps. Signed-off-by: NDon Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393429527-167840-3-git-send-email-dzickus@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
I.e. don't drop al->filtered entries, create the hist_entries and use its ->filtered bitmap, that is kept with the same semantics for its bitmap, leaving the filtering to be done at the hist_entry level, i.e. in the UIs. This will allow zooming in/out the filters. Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com> Acked-by: NJiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-xeyhkepu7plw716lrtb0zlnu@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
Instead of bailing out as soon as we find a filter that applies, go on checking all of them so that we can zoom in/out filters. We also need to make sure we only update al->filtered after thread__find_addr_map(), because there is where al->filtered gets initialized to zero. This will increase the cost of processing when all we don't need this toggling, but will provide flexibility for the TUI and GTK+ interfaces, that will incur in creating the hist_entries just once. Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com> Acked-by: NJiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-fhv9lhzdjxgp9w3w3668lsfw@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
By turning the addr_location->filtered member from a boolean to a u8 bitmap, reusing (and extending) the hist_filter enum for that. This patch doesn't change the logic at all, as it keeps the meaning of al->filtered !0 to mean that the entry _was_ filtered, so no change in how this value is interpreted needs to be done at this point. This will be soon used in upcoming patches. Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com> Acked-by: NJiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-89hmfgtr9t22sky1lyg7nw7l@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 15 3月, 2014 9 次提交
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由 Jiri Olsa 提交于
Forcing the code to always search thread by pid/tid pair. The PID value will be needed in future to determine the process thread leader for map groups sharing. Signed-off-by: NJiri Olsa <jolsa@redhat.com> Acked-by: NAdrian Hunter <adrian.hunter@intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1394805606-25883-3-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Don Zickus 提交于
When trying to capture perf data on a system running spejbb2013, perf hung for about 15 minutes. This is because it took that long to gather about 10,000 thread maps and process them. I don't think a user wants to wait that long. Instead, recognize that thread maps are roughly equivalent to pid maps and just quickly copy those instead. To do this, I synthesize 'fork' events, this eventually calls thread__fork() and copies the maps over. The overhead goes from 15 minutes down to about a few seconds. -- V2: based on Jiri's comments, moved malloc up a level and made sure the memory was freed Signed-off-by: NDon Zickus <dzickus@redhat.com> Acked-by: NJiri Olsa <jolsa@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Link: http://lkml.kernel.org/r/1394808224-113774-1-git-send-email-dzickus@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Ramkumar Ramachandra 提交于
Introduce $ perf kvm --list-cmds to dump a raw list of commands for use by the completion script. In order to do this, introduce parse_options_subcommand() for handling subcommands as a special case in the parse-options machinery. Signed-off-by: NRamkumar Ramachandra <artagnon@gmail.com> Acked-by: NDavid Ahern <dsahern@gmail.com> Acked-by: NJiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1393896396-10427-1-git-send-email-artagnon@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
Those functions need evsel to investigate event group and it's passed via hpp->ptr. However as it can be missed easily so it's better to pass it via an argument IMHO. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1394437440-11609-2-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
Its one level up thread__find_addr_location, where it will look in different domains for a sample: user, kernel, hypervisor, etc. Will soon be used by a patchkit by Andi Kleen. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-so6nxkh7xj48bc5kq4jpj991@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Don Zickus 提交于
When printing the raw dump of a data file, the header.misc is printed as a decimal. Unfortunately, that field is a bit mask, so it is hard to interpret as a decimal. Print in hex, so the user can easily see what bits are set and more importantly what type of info it is conveying. V2: add 0x in front per Jiri Olsa Signed-off-by: NDon Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393386227-149412-3-git-send-email-dzickus@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
The __hpp__color_fmt used in the TUI code can be replace by the generic code with small change in print_fn callback. And it also needs to move callback function to the generic __hpp__fmt(). No functional changes intended. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393809254-4480-5-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
Instead of the pointer to buffer and its size so that it can also get private argument passed along with hpp. This is a preparation of further change. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393809254-4480-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
The __hpp__color_fmt used in the gtk code can be replace by the generic code with small change in print_fn callback. This is a preparation to upcoming changes and no functional changes intended. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NPekka Enberg <penberg@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393809254-4480-3-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 14 3月, 2014 1 次提交
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由 Don Zickus 提交于
Currently if a process creates a bunch of threads using pthread_create and then perf is run in system_wide mode, the mmaps for those threads are not captured with a synthesized mmap event. The reason is those threads are not visible when walking the /proc/ directory looking for /proc/<pid>/maps files. Instead they are discovered using the /proc/<pid>/tasks file (which the synthesized comm event uses). This causes problems when a program is trying to map a data address to a tid. Because the tid has no maps, the event is dropped. Changing the program to look up using the pid instead of the tid, finds the correct maps but creates ugly hacks in the program to carry the correct tid around. Fix this by moving the walking of the /proc/<pid>/tasks up a level (out of the comm function) based on Arnaldo's suggestion. Tweaked things a bit to special case the 'full' bit and 'guest' check. Signed-off-by: NDon Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393429527-167840-2-git-send-email-dzickus@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 11 3月, 2014 1 次提交
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由 Jiri Olsa 提交于
User space callchains and user space stack dump were disabled for function trace event. Mailing list discussions: http://marc.info/?t=139302086500001&r=1&w=2 http://marc.info/?t=139301437300003&r=1&w=2 Catching up with perf and disabling user space callchains and DWARF unwind (uses user stack dump) for function trace event. Adding following warnings when callchains are used for function trace event: # perf record -g -e ftrace:function ... Disabling user space callchains for function trace event. ... # ./perf record --call-graph=dwarf -e ftrace:function ... Cannot use DWARF unwind for function trace event, falling back to framepointers. Disabling user space callchains for function trace event. ... Signed-off-by: NJiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1393775800-13524-4-git-send-email-jolsa@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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- 10 3月, 2014 2 次提交
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由 Don Zickus 提交于
When trying to map a bunch of instruction addresses to their respective threads, I kept getting a lot of bogus entries [I forget the exact reason as I patched my code months ago]. Looking through ip__resolve_ams, I noticed the check for if (al.sym) and realized, most times I have an al.map definition but sometimes an al.sym is undefined. In the cases where al.sym is undefined, the loop keeps going even though a valid al.map exists. Modify this check to use the more reliable al.map. This fixed my bogus entries. Signed-off-by: NDon Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393386227-149412-2-git-send-email-dzickus@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Jiri Olsa 提交于
Fixing crash in elf_section_by_name function caused by missing section name in elf binary. Reported-by: NAlbert Strasheim <albert@cloudflare.com> Signed-off-by: NJiri Olsa <jolsa@redhat.com> Cc: Albert Strasheim <albert@cloudflare.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393767127-599-1-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 28 2月, 2014 1 次提交
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由 Jiri Olsa 提交于
When compiling perf tool code with gcc 4.4.7 I'm getting following error: CC util/session.o cc1: warnings being treated as errors util/session.c: In function ‘perf_session_deliver_event’: tools/perf/util/include/linux/bitops.h:109: error: dereferencing pointer ‘p’ does break strict-aliasing rules tools/perf/util/include/linux/bitops.h:101: error: dereferencing pointer ‘p’ does break strict-aliasing rules util/session.c:697: note: initialized from here tools/perf/util/include/linux/bitops.h:101: note: initialized from here make[1]: *** [util/session.o] Error 1 make: *** [util/session.o] Error 2 The aliased types here are u64 and unsigned long pointers, which is safe for the find_first_bit processing. This error shows up for me only for gcc 4.4 on 32bit x86, even for -Wstrict-aliasing=3, while newer gcc are quiet and scream here for -Wstrict-aliasing={2,1}. Looks like newer gcc changed the rules for strict alias warnings. The gcc documentation offers workaround for valid aliasing by using __may_alias__ attribute: http://gcc.gnu.org/onlinedocs/gcc-4.4.0/gcc/Type-Attributes.html Using this workaround for the find_first_bit function. Signed-off-by: NJiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393434867-20271-1-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 25 2月, 2014 2 次提交
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由 Namhyung Kim 提交于
When loading a dso it'll look for symbol tables of all possible types. However it's just wasted of time to check incompatible types - like trying kernel module when loading user library. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1392859976-32760-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Stephane Eranian 提交于
When dso__read_binary_type_filename() called, it doesn't check the return value of filename__read_debuglink() so that it'll try to open the debuglink file even if it doesn't exist. Also fix return value of the filename__read_debuglink() as it always return -1 regardless of the result. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1392859976-32760-3-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 24 2月, 2014 3 次提交
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由 Namhyung Kim 提交于
Stephane reported that perf report and annotate failed to process data using lots of (> 500) shared libraries. It was because of the limit on number of open files (ulimit -n). Currently when perf loads a DSO, it'll look for normal and dynamic symbol tables. And if it fails to find out both tables, it'll iterate all of possible symtab types. But many of them are useless since they have no additional information and the problem is that it's not closing those files even though they're not used. Fix it. Reported-by: NStephane Eranian <eranian@google.com> Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1392859976-32760-2-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Namhyung Kim 提交于
The TUI of perf report and top support annotation, but stdio and GTK don't. So it should be checked before calling hist_entry__inc_addr_ samples() to avoid wasting resources that will never be used. perf annotate need it regardless of UI and sort keys, so the check of whether to allocate resources should be on the tools that have annotate as an option in the TUI, 'report' and 'top', not on the function called by all of them. It caused perf annotate on ppc64 to produce zero output, since the buckets were not being allocated. Reported-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Cc: Anton Blanchard <anton@samba.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1392859976-32760-1-git-send-email-namhyung@kernel.org [ Renamed (report,top)__needs_annotate() to ui__has_annotation() ] Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Jiri Olsa 提交于
Adding libdw DWARF post unwind support, which is part of elfutils-devel/libdw-dev package from version 0.158. The new code is contained in unwin-libdw.c object, and implements unwind__get_entries unwind interface function. New Makefile variable NO_LIBDW_DWARF_UNWIND was added to control its compilation, and is marked as disabled now. It's factored with the rest of the Makefile unwind build code in the next patch. Arch specific code was added for x86. Signed-off-by: NJiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1392825179-5228-5-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 18 2月, 2014 6 次提交
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由 Masami Hiramatsu 提交于
Support distro-style debuginfo supported by dso for setting uprobes. Note that this tries to find a debuginfo file based on the real path of the target binary. If the debuginfo is not correctly installed on the system, this can not find it. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053227.29635.54434.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Allow to add events on the local functions without debuginfo. (With the debuginfo, we can add events even on inlined functions) Currently, probing on local functions requires debuginfo to locate actual address. It is also possible without debuginfo since we have symbol maps. Without this change; ---- # ./perf probe -a t_show Added new event: probe:t_show (on t_show) You can now use it in all perf tools, such as: perf record -e probe:t_show -aR sleep 1 # ./perf probe -x perf -a identity__map_ip no symbols found in /kbuild/ksrc/linux-3/tools/perf/perf, maybe install a debug package? Failed to load map. Error: Failed to add events. (-22) ---- As the above results, perf probe just put one event on the first found symbol for kprobe event. Moreover, for uprobe event, perf probe failed to find local functions. With this change; ---- # ./perf probe -a t_show Added new events: probe:t_show (on t_show) probe:t_show_1 (on t_show) probe:t_show_2 (on t_show) probe:t_show_3 (on t_show) You can now use it in all perf tools, such as: perf record -e probe:t_show_3 -aR sleep 1 # ./perf probe -x perf -a identity__map_ip Added new events: probe_perf:identity__map_ip (on identity__map_ip in /kbuild/ksrc/linux-3/tools/perf/perf) probe_perf:identity__map_ip_1 (on identity__map_ip in /kbuild/ksrc/linux-3/tools/perf/perf) probe_perf:identity__map_ip_2 (on identity__map_ip in /kbuild/ksrc/linux-3/tools/perf/perf) probe_perf:identity__map_ip_3 (on identity__map_ip in /kbuild/ksrc/linux-3/tools/perf/perf) You can now use it in all perf tools, such as: perf record -e probe_perf:identity__map_ip_3 -aR sleep 1 ---- Now we succeed to put events on every given local functions for both kprobes and uprobes. :) Note that this also introduces some symbol rbtree iteration macros; symbols__for_each, dso__for_each_symbol, and map__for_each_symbol. These are for walking through the symbol list in a map. Changes from v2: - Fix add_exec_to_probe_trace_events() not to convert address to tp->symbol any more. - Fix to set kernel probes based on ref_reloc_sym. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053225.29635.15026.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Show source-level or symbol-level information for uprobe events. Without this change; # ./perf probe -l probe_perf:dso__load_vmlinux (on 0x000000000006d110 in /kbuild/ksrc/linux-3/tools/perf/perf) With this change; # ./perf probe -l probe_perf:dso__load_vmlinux (on dso__load_vmlinux@util/symbol.c in /kbuild/ksrc/linux-3/tools/perf/perf) Changes from v2: - Update according to previous patches. Changes from v1: - Rewrite the code based on new series. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053223.29635.51280.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Show appropriate symbol for ref_reloc_sym based kprobes instead of refpoint+offset when perf-probe -l runs without debuginfo. Without this change: # ./perf probe -l probe:t_show (on _stext+889880 with m v) probe:t_show_1 (on _stext+928568 with m v t) probe:t_show_2 (on _stext+969512 with m v fmt) probe:t_show_3 (on _stext+1001416 with m v file) With this change: # ./perf probe -l probe:t_show (on t_show with m v) probe:t_show_1 (on t_show with m v t) probe:t_show_2 (on t_show with m v fmt) probe:t_show_3 (on t_show with m v file) Changes from v2: - Check ref_reloc_sym to find correct unrelocated address. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053220.29635.81819.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Find the given address from offline dwarfs instead of online kernel dwarfs. On the KASLR enabled kernel, the kernel text section is loaded with random offset, and the debuginfo__new_online_kernel can't handle it. So let's move to the offline dwarf loader instead of using the online dwarf loader. As a result, since we don't need debuginfo__new_online_kernel any more, this also removes the functions related to that. Without this change; # ./perf probe -l probe:t_show (on _stext+901288 with m v) probe:t_show_1 (on _stext+939624 with m v t) probe:t_show_2 (on _stext+980296 with m v fmt) probe:t_show_3 (on _stext+1014392 with m v file) With this change; # ./perf probe -l probe:t_show (on t_show@linux-3/kernel/trace/ftrace.c with m v) probe:t_show_1 (on t_show@linux-3/kernel/trace/trace.c with m v t) probe:t_show_2 (on t_show@kernel/trace/trace_printk.c with m v fmt) probe:t_show_3 (on t_show@kernel/trace/trace_events.c with m v file) Changes from v2: - Instead of retrying, directly opens offline dwarf. - Remove debuginfo__new_online_kernel and related functions. - Refer map->reloc to get the correct address of a symbol. - Add a special case for handling ref_reloc_sym based address. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053218.29635.74821.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Masami Hiramatsu 提交于
Since several local symbols can have same name (e.g. t_show), we need to use the relative address from the symbol referred by kmap->ref_reloc_sym instead of the target symbol name itself. Because the kernel address space layout randomize (kASLR) changes the absolute address of kernel symbols, we can't rely on the absolute address. Note that this works only with debuginfo. E.g. without this change; ---- # ./perf probe -a "t_show \$vars" Added new events: probe:t_show (on t_show with $vars) probe:t_show_1 (on t_show with $vars) probe:t_show_2 (on t_show with $vars) probe:t_show_3 (on t_show with $vars) You can now use it in all perf tools, such as: perf record -e probe:t_show_3 -aR sleep 1 ---- OK, we have 4 different t_show()s. All functions have different arguments as below; ---- # cat /sys/kernel/debug/tracing/kprobe_events p:probe/t_show t_show m=%di:u64 v=%si:u64 p:probe/t_show_1 t_show m=%di:u64 v=%si:u64 t=%si:u64 p:probe/t_show_2 t_show m=%di:u64 v=%si:u64 fmt=%si:u64 p:probe/t_show_3 t_show m=%di:u64 v=%si:u64 file=%si:u64 ---- However, all of them have been put on the *same* address. ---- # cat /sys/kernel/debug/kprobes/list ffffffff810d9720 k t_show+0x0 [DISABLED] ffffffff810d9720 k t_show+0x0 [DISABLED] ffffffff810d9720 k t_show+0x0 [DISABLED] ffffffff810d9720 k t_show+0x0 [DISABLED] ---- With this change; ---- # ./perf probe -a "t_show \$vars" Added new events: probe:t_show (on t_show with $vars) probe:t_show_1 (on t_show with $vars) probe:t_show_2 (on t_show with $vars) probe:t_show_3 (on t_show with $vars) You can now use it in all perf tools, such as: perf record -e probe:t_show_3 -aR sleep 1 # cat /sys/kernel/debug/tracing/kprobe_events p:probe/t_show _stext+889880 m=%di:u64 v=%si:u64 p:probe/t_show_1 _stext+928568 m=%di:u64 v=%si:u64 t=%si:u64 p:probe/t_show_2 _stext+969512 m=%di:u64 v=%si:u64 fmt=%si:u64 p:probe/t_show_3 _stext+1001416 m=%di:u64 v=%si:u64 file=%si:u64 # cat /sys/kernel/debug/kprobes/list ffffffffb50d95e0 k t_show+0x0 [DISABLED] ffffffffb50e2d00 k t_show+0x0 [DISABLED] ffffffffb50f4990 k t_show+0x0 [DISABLED] ffffffffb50eccf0 k t_show+0x0 [DISABLED] ---- This time, each event is put in different address correctly. Note that currently this doesn't support address-based probe on modules (thus the probes on modules are symbol based), since it requires relative address probe syntax for kprobe-tracer, and it isn't implemented yet. One more note, this allows us to put events on correct address, but --list option should be updated to show correct corresponding source code. Changes from v2: - Refer kmap->ref_reloc_sym instead of "_stext". - Refer map->reloc to catch up the kASLR perf fix. Changes from v1: - Use _stext relative address instead of actual absolute address recorded in debuginfo. Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: "David A. Long" <dave.long@linaro.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20140206053216.29635.22584.stgit@kbuild-fedora.yrl.intra.hitachi.co.jpSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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