- 14 Aug, 2013 1 commit
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David Ahern authored
Commit b55ae0a9 added code-reading.c which fails to compile on Fedora 16 with compiler version: $ gcc --version gcc (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2) Failure message is: tests/code-reading.c: In function ‘do_sort_something’: tests/code-reading.c:305:13: error: stack protector not protecting local variables: variable length buffer [-Werror=stack-protector] cc1: all warnings being treated as errors make: *** [/tmp/junk/tests/code-reading.o] Error 1 make: *** Waiting for unfinished jobs.... v2: as Adrian noticed changed sizeof to ARRAY_SIZE Signed-off-by:
David Ahern <dsahern@gmail.com> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1376454732-83728-1-git-send-email-dsahern@gmail.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 12 Aug, 2013 19 commits
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Adrian Hunter authored
Now that the symbol filter is recorded on the machine there is no need to pass it to thread__find_addr_map(). So remove it. Signed-off-by:
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Adrian Hunter authored
Now that the symbol filter is recorded on the machine there is no need to pass it to thread__find_addr_location(). So remove it. Signed-off-by:
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Adrian Hunter authored
Now that the symbol filter is recorded on the machine there is no need to pass it to perf_event__preprocess_sample(). So remove it. Signed-off-by:
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Adrian Hunter authored
Take into use the machines symbol filter member. Signed-off-by:
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Adrian Hunter authored
Member 'annotate_init' of struct perf_mem is unused. Remove it. Signed-off-by:
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Adrian Hunter authored
Take into use the machines' symbol filter member. Signed-off-by:
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Adrian Hunter authored
Take into use the machines symbol filter member. Signed-off-by:
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Adrian Hunter authored
The symbol filter needs to be applied machine-wide, so add it to struct machine. Currently tools pass the symbol filter as a parameter to various map-related functions. However a need to load a map can occur anywhere in the code, at which point the filter is needed. Signed-off-by:
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David Ahern authored
Any event can have RAW data attribute set. The intent of the function is to determine if the session has tracepoints, so check for the type of each event explicitly. Signed-off-by:
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David Ahern authored
Option is used by upcoming timehist command. Signed-off-by:
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David Ahern authored
Option is used by upcoming timehist command. Signed-off-by:
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David Ahern authored
Make print options based on flags. Simplifies addition of more print options which is the subject of upcoming patches. Signed-off-by:
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David Ahern authored
The PERF_RECORD_FORK event is already collected as part of the use of cmd_record and those events are analyzed as part of the libperf machinery. Using the fork tracepoint as well just duplicates the event load. Signed-off-by:
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David Ahern authored
Event is not needed nor analyzed. Since perf-sched leverages perf-record to capture the sched data, we already capture task events like EXIT. Signed-off-by:
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David Ahern authored
Not used in the function, so no sense in doing the lookup here. Thread look up will be done in the timehist command, and no sense in doing it twice. Signed-off-by:
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David Ahern authored
Destroy argument is not necessary. If session is not returned to caller, then clean it up. Signed-off-by:
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David Ahern authored
Update perf-kvm documentation with new live subcommand. Add -p/--pid option for perf-kvm-stat-report as well. Signed-off-by:
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com> Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1375926999-75129-2-git-send-email-dsahern@gmail.comSigned-off-by:
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David Ahern authored
This is useful to spot high latency blips. It is normal for HLT reasons to have long exit times, so strip those from the duration check. v2: changed threshold to duration per acme's request Signed-off-by:
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: * Do annotation using /proc/kcore and /proc/kallsyms, removing the need for a vmlinux file kernel assembly annotation. This also improves this use case because vmlinux has just the initial kernel image, not what is actually in use after various code patchings by things like alternatives, etc. From Adrian Hunter. * Add various improvements and fixes to the "vmlinux matches kallsyms" 'perf test' entry, related to the /proc/kcore annotation feature. * Add --initial-delay option to 'perf stat' to skip measuring for the startup phase, from Andi Kleen. * Add perf kvm stat live mode that combines aspects of 'perf kvm stat' record and report, from David Ahern. * Add option to analyze specific VM in perf kvm stat report, from David Ahern. * Do not require /lib/modules/* on a guest, fix from Jason Wessel. * Group leader sampling, that allows just one event in a group to sample while the other events have just its values read, from Jiri Olsa. * Add support for a new modifier "D", which requests that the event, or group of events, be pinned to the PMU, from Michael Ellerman. * Fix segmentation fault on the gtk browser, from Namhyung Kim. Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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- 07 Aug, 2013 20 commits
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Joonsoo Kim authored
This reverts commit 079787f2. Below commit already resolve a cross build problem. I have been noticed this too lately. commit 3c4797d4 Author: Rabin Vincent <rabin@rab.in> Date: Fri May 17 22:27:44 2013 +0200 tools lib lk: Respect CROSS_COMPILE Make lk use CROSS_COMPILE, in order to be able to cross compile perf again. Signed-off-by:
Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Ingo Molnar <mingo@redhat.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/1373936614-22224-1-git-send-email-iamjoonsoo.kim@lge.comSigned-off-by:
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Jason Wessel authored
For some types of work loads and special guest environments, you might have a kernel that has no kernel modules. The perf kvm record tool fails instantiate vmlinux maps when the kernel modules directory cannot be opened, even though the kallsyms has been properly processed. This leads to a perf kvm report that has no guest symbols resolved. This patch changes the failure to locate kernel modules to be non-fatal. Signed-off-by:
Jason Wessel <jason.wessel@windriver.com> Acked-by:
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Michael Ellerman authored
Add a negative test to test__checkevent_pmu_events() to get lots of coverage of the negative case, ie. when the modifier is not specified. Add a test of a single event, and of the group case. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Acked-by:
Jiri Olsa <jolsa@redhat.com> Acked-by:
Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1375795686-4226-2-git-send-email-michael@ellerman.id.auSigned-off-by:
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Michael Ellerman authored
This commit adds support for a new modifier "D", which requests that the event, or group of events, be pinned to the PMU. The "p" modifier is already taken for precise, and "P" may be used in future to mean "fully precise". So we use "D", which stands for pinneD - and looks like a padlock, or if you're using the ":D" syntax perf smiles at you. This is an oft-requested feature from our HW folks, who want to be able to run a large number of events, but also want 100% accurate results for instructions per cycle. Comparison of results with and without pinning: $ perf stat -e '{cycles,instructions}:D' -e cycles,instructions,... 79,590,480,683 cycles # 0.000 GHz 166,123,716,524 instructions # 2.09 insns per cycle # 0.11 stalled cycles per insn 79,352,134,463 cycles # 0.000 GHz [11.11%] 165,178,301,818 instructions # 2.08 insns per cycle # 0.11 stalled cycles per insn [11.13%] As you can see although perf does a very good job of scaling the values in the non-pinned case, there is some small discrepancy. The patch is fairly straight forward, the one detail is that we need to make sure we only request pinning for the group leader when we have a group. Signed-off-by: -
Namhyung Kim authored
The commit 2b8bfa6b ("perf tools: Centralize default columns init in perf_hpp__init") moves initialization of common overhead column to perf_hpp__init() but forgot about the gtk code. So the gtk code added the same column to the list twice causing infinite loop when iterating it by perf_hpp__for_each_format loop. When I run perf report --gtk, I can see following messages indefinitely. (perf:11687): Gtk-CRITICAL **: IA__gtk_main_quit: assertion 'main_loops != NULL' failed perf: Segmentation fault Signed-off-by:
Pekka Enberg <penberg@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.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/1375766056-19377-2-git-send-email-namhyung@kernel.orgSigned-off-by:
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David Ahern authored
Add an option to analyze a specific VM within a data file. This allows the collection of kvm events for all VMs and then analyze data for each VM (or set of VMs) individually. Signed-off-by:
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David Ahern authored
Add max and min times for exit events. v2: address Xiao's comment to use get_event function for pulling max and min from stats struct similar to mean and count Signed-off-by: -
David Ahern authored
perf kvm stat currently requires back to back record and report commands to see stats. e.g,. perf kvm stat record -p $pid -- sleep 1 perf kvm stat report This is inconvenvient for on box monitoring of a VM. This patch introduces a 'live' mode that in effect combines the record plus report into one command. e.g., to monitor a single VM: perf kvm stat live -p $pid or all VMs: perf kvm stat live Same stats options for the record+report path work with the live mode. Display rate defaults to 1 second and can be changed using the -d option. v4: - address comments from Xiao -- verify_vcpu check should not look at processors on line for the host, prune configurable options. - set attr->{mmap,comm,task} to 0 - don't need task events so trim events we have to deal with - better control of time for queue event flushing to reduce frequency of "Timestamp below last timeslice flush" failures. v3: updated to use existing tracepoint parsing code v2: removed ABSTIME arg from timerfd_settime as mentioned by Namhyung only call perf_kvm__handle_stdin when poll returns activity. Signed-off-by: -
David Ahern authored
Taking a lesson from perf-trace and bringing in control of event processing to perf-kvm-stat-live: parse the sample to get access the time leaving just the need to queue it to the ordered samples list. For that the queue_event function needs to be exported. Unexport perf_session__process_event. Signed-off-by:
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Ingo Molnar authored
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Arnaldo Carvalho de Melo authored
The previous description: "Search previous string" is usually associated with the 'N' following a '/string', the opposite of 'n', which is 'Search next string' in the direction established with '/' or '?'. So change it to 'Search string backwards', to clarify that. The 'N' hotkey remains to be implemented with the semantic described above. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> 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-5lw5y15d7vv308xbpm8pqe4g@git.kernel.orgSigned-off-by:
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Adrian Hunter authored
The /proc/kcore file has no symbols, so the call target name does not display. Fix by looking up the symbol name if it is on the same map. Reported-by:
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Adrian Hunter authored
When kcore is used for annotation, symbols do not have correct sizes because they come from kallsyms, that has only its start address, with the end address being the next symbol's minus one. That sometimes results in an extra nop being seen after the end of a function. Remove it. Suggested-by:
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Adrian Hunter authored
Currently the symbol name is displayed at the top when displaying symbol annotation. Add to this the dso long name. Suggested-by:
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Adrian Hunter authored
Annotation with /proc/kcore is possible so the logic is adjusted to allow it. The main difference is that /proc/kcore had no symbols so the parsing logic needed a tweak to read jump offsets. The other difference is that objdump cannot always read from kcore. That seems to be a bug with objdump. Signed-off-by:
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Adrian Hunter authored
Make the "object code reading" test attempt to read from kcore. The test uses objdump which struggles with kcore. i.e. doesn't always work, sometimes takes a long time. The test has been made to work around those issues. Signed-off-by:
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Adrian Hunter authored
The kallsyms maps now may map to kcore and the symbol values now may be file offsets. For comparison with vmlinux the virtual memory address is needed which is obtained by unmapping the symbol value. The "vmlinux symtab matches kallsyms" is adjusted accordingly. Signed-off-by:
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Adrian Hunter authored
In the absence of vmlinux, perf tools uses kallsyms for symbols. If the user has access, now also map to /proc/kcore. The dso data_type is now set to either DSO_BINARY_TYPE__KCORE or DSO_BINARY_TYPE__GUEST_KCORE as approprite. This patch breaks the "vmlinux symtab matches kallsyms" test. That is fixed in a following patch. Signed-off-by:
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Adrian Hunter authored
The new "object code reading" test shows that it is not possible to read object code from kernel modules. That is because the mappings do not map to the dsos. This patch fixes that. This involves identifying and flagging relocatable (ELF type ET_REL) files (e.g. kernel modules) for symbol adjustment and updating map__rip_2objdump() accordingly. The kmodule parameter of dso__load_sym() is taken into use and the module map altered to map to the dso. Signed-off-by:
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Adrian Hunter authored
The vmlinux maps now map to the dso and the symbol values are now file offsets. For comparison with kallsyms the virtual memory address is needed which is obtained by unmapping the symbol value. The "vmlinux symtab matches kallsyms" is adjusted accordingly. Signed-off-by:
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