- 27 May, 2015 40 commits
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Martin Liška authored
Assign default value for pointers that are identified by the compiler as non-initialized. Signed-off-by:
Martin Liska <mliska@suse.cz> Acked-by:
Ingo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/r/5564393C.1090104@suse.czSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
In a few more remaining places, for consistency. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-c2n7slwtto29wndfttdrhfrx@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
As the way DSOs are created are normally via dsos__findnew, so that we don't have to load the same dso multiple times for multiple maps (think about /lib64/libc.so.6), so they may be shared and dso__delete() should be left to be done as part of the map destruction process. This will all be properly solved by reference counting struct dso, which will be done soon. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-gbrohe1nvkjxw3u5a1bgj3yh@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
We use: BUG_ON(!RB_EMPTY_NODE(&thread->rb_node)); in the thread destructor as a debugging check to find out about possibly still referenced thread instances being deleted, to do that we need to make sure we use RB_CLEAR_NODE() right after rb_erase(), i.e. that we use the newly introduced rb_erase_init(), that works just like list_del_init(). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-4fcqo5ypy1cjjf15ilb0hn78@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
I was assuming rb_erase() was setting things up like list_del_init, but the fact that thread__delete() was being sucessfull is because the last thing before deleting is to remove the thread from the machine->dead_threads list, using list_del_init(), that has the same effect as using rb_erase_init()... Introduce this function so that we can use it when removing objects from rb_trees. Then we will be able to BUG_ON(still on a list) in destructors. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-55b16mbtndjyd7zzg8nmnamx@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Since: 9fdbf671 "perf tools: do not flush maps on COMM for perf report" We have no users of this function, nuke it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Luigi Semenzato <semenzato@chromium.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-hsac1t42ehtva8gut8qe6hih@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
A thread moves from a rb tree to a list, but can't be on both, because those linkage members are in a union. This is leftover from when I was debugging thread refcounting and had nuked that union. It is harmless duplication, as RB_CLEAR_NODE() does again what INIT_LIST_HEAD does. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-hmma9lmip6qlhzhgkhp9tzd1@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
It really is a 'struct map' method, and since we're introducing a new 'struct maps' class, fix it to avoid confusion. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-xo9ifhk53cfl30wqcuhxpnvl@git.kernel.orgSigned-off-by:
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Namhyung Kim authored
Using dso__data_fd() in multi-thread environment is not safe since returned fd can be closed and/or reused anytime. So convert it to the dso__data_get/put_fd() pair to protect the access with lock. The original dso__data_fd() is deprecated and kept only for testing. Signed-off-by:
Namhyung Kim <namhyung@kernel.org> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432137821-10853-3-git-send-email-namhyung@kernel.orgSigned-off-by:
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Namhyung Kim authored
It seems that the dso__data_fd() was needed to find a binary type since open in data_file_size() alone used to fail. But as it can open the dso fine now, the dso__data_fd() can go away. Signed-off-by:
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Namhyung Kim authored
When dso__data_read_offset/addr() is called without prior dso__data_fd() (or other functions which call it internally), it failed to open dso in data_file_size() since its binary type was not identified. However calling dso__data_fd() in dso__data_read_offset() will hurt performance as it grabs a global lock everytime. So factor out the loop on the binary type in dso__data_fd(), and call it from both. Reported-by:
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Arnaldo Carvalho de Melo authored
It could be used somewhere, so just call map__groups_put() to make sure we don't delete it prematurely Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-dxmh8mr12i65p8h909vi88cp@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Now that we have atomic.h, we should convert all of the existing refcounts to use it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-quzeuy3jwsyod6e06o39cl6y@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
To match the convention used elsewhere. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-66oo6yn8upssfeuprwy0il1q@git.kernel.orgSigned-off-by:
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Namhyung Kim authored
The evsel and sample arguments are to set iter for later use. As it also receives an iter as another argument, just set them before calling the function. Signed-off-by:
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Adrian Hunter authored
perf_session__peek_event() generally leverages there being a single mmap of the perf.data file, however on 32-bit platforms when there is more that 32MiB of data, then there are multiple mmaps, so perf_session__peek_event() reads from the file. In that case a couple of bugs were exposed (note how the seg. fault appears with >32M of data): $ perf record --per-thread -e intel_bts// ../rtit-tests/loopy 1000000 [ perf record: Woken up 13 times to write data ] [ perf record: Captured and wrote 24.568 MB perf.data ] $ perf script > /dev/null $ perf record --per-thread -e intel_bts// ../rtit-tests/loopy 10000000 [ perf record: Woken up 136 times to write data ] [ perf record: Captured and wrote 270.794 MB perf.data ] $ perf script > /dev/null Segmentation fault (core dumped) The wrong address was being passed to the readn() function and the buffer size was not being checked. Signed-off-by:
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Adrian Hunter authored
The libunwind feature would never detect because of the following error: $ cat tools/build/feature/test-libunwind.make.output /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_stream_buffer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_uncompressed_size' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_end' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_buffer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_stream_footer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_size' collect2: error: ld returned 1 exit status Fix by adding -llzma and re-ordering to match the dependencies. Signed-off-by:
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Adrian Hunter authored
Parse errors can be reported in struct parse_events_error but the pointer passed is optional and can be NULL. Ensure it is not NULL before dereferencing it. Signed-off-by:
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Adrian Hunter authored
Patch "perf tools: Add location to pmu event terms" moved declarations for parse_events_term__num() and parse_events_term__str() so that they were no longer visible in parse-events.y. That can result in segfaults as the arguments no longer need match the function prototype. Move the declarations back, changing YYLTYPE pointers to pointers-to-void because YYLTYPE is not generated until parse-events.y is processed. Signed-off-by:
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Nam T. Nguyen authored
This refactors out install-bin to install-tests and install-tools so that downstream could opt to only install the tools, and not the tests. Signed-off-by:
Nam T. Nguyen <namnguyen@chromium.org> Acked-by:
Jiri Olsa <jolsa@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Simon Que <sque@chromium.org> Link: http://lkml.kernel.org/r/1431974247-22275-1-git-send-email-namnguyen@chromium.orgSigned-off-by:
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Alexander Shishkin authored
There is a 'pt' variable in the outer scope of pt_event_stop() with the same type, we don't really need another one in the inner scope. This patch removes the redundant variable declaration. Signed-off-by:
Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@infradead.org Cc: adrian.hunter@intel.com Cc: hpa@zytor.com Link: http://lkml.kernel.org/r/1432308626-18845-8-git-send-email-alexander.shishkin@linux.intel.comSigned-off-by:
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Alexander Shishkin authored
Initially, we were trying to guard against scenarios where somebody attaches to the system with a hardware debugger while PT is enabled from software and pt_is_running() tries to make sure we handle this better, but the truth is, there is still a race window no matter what and people with hardware debuggers should really know what they are doing anyway. In other words, there is no point in keeping this one around, and it's one RDMSR instructions fewer in the fast path. The case when PT is enabled by the BIOS at boot time is handled in the driver initialization path and doesn't use pt_is_running(). This patch gets rid of it. Signed-off-by:
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Alexander Shishkin authored
Currently, the description of pt_buffer_reset_offsets() lacks information about its calling constraints and ordering with regards to other buffer management functions. Add a clarification about when this function has to be called. Signed-off-by:
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Alexander Shishkin authored
The comments in the driver don't make it absolutely clear as to what exactly is the calling order and other possible constraints of buffer management functions. Document constraints and calling order for the buffer configuration functions. While at it, replace a redundant check in pt_buffer_reset_markers() with an explanation why it is not needed. Signed-off-by:
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Alexander Shishkin authored
Currently, there's a set-but-not-used variable in setup_topa_index(); this patch gets rid of it. And while at it, fixes a style issue with brackets around a one-line block. Signed-off-by:
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Peter Zijlstra authored
Don't bother with taking locks if we're not actually going to do anything. Also, drop the _irqsave(), this is very much only called from IRQ-disabled context. Signed-off-by:
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Peter Zijlstra authored
!x && y == ! (x || !y) Signed-off-by:
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Peter Zijlstra authored
For some obscure reason intel_{start,stop}_scheduling() copy the HT state to an intermediate array. This would make sense if we ever were to make changes to it which we'd have to discard. Except we don't. By the time we call intel_commit_scheduling() we're; as the name implies; committed to them. We'll never back out. A further hint its pointless is that stop_scheduling() unconditionally publishes the state. So the intermediate array is pointless, modify the state in place and kill the extra array. And remove the pointless array initialization: INTEL_EXCL_UNUSED == 0. Note; all is serialized by intel_excl_cntr::lock. Signed-off-by: -
Peter Zijlstra authored
Both intel_commit_scheduling() and intel_get_excl_contraints() test for cntr < 0. The only way that can happen (aside from a bug) is through validate_event(), however that is already captured by the cpuc->is_fake test. So remove these test and simplify the code. Signed-off-by:
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Peter Zijlstra authored
Move the code of intel_commit_scheduling() to the right place, which is in between start() and stop(). No change in functionality. Signed-off-by:
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Peter Zijlstra authored
The intel_commit_scheduling() callback is pointlessly different from the start and stop scheduling callback. Furthermore, the constraint should never be NULL, so remove that test. Even though we'll never get called (because we NULL the callbacks) when !is_ht_workaround_enabled() put that test in. Collapse the (pointless) WARN_ON_ONCE() and bail on !cpuc->excl_cntrs -- this is doubly pointless, because its the same condition as is_ht_workaround_enabled() which was already pointless because the whole method won't ever be called. Furthremore, make all the !excl_cntrs test WARN_ON_ONCE(); they're all pointless, because the above, either the function ({get,put}_excl_constraint) are already predicated on it existing or the is_ht_workaround_enabled() thing is the same test. Signed-off-by: -
Peter Zijlstra authored
We have two 'struct event_constraint' local variables in intel_get_excl_constraints(): 'cx' and 'c'. Instead of using 'cx' after the dynamic allocation, put all 'cx' inside the dynamic allocation block and use 'c' outside of it. Also use direct assignment to copy the structure; let the compiler figure it out. Signed-off-by:
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Peter Zijlstra authored
Lockdep is very good at finding incorrect IRQ state while locking and is far better at telling us if we hold a lock than the _is_locked() API. It also generates less code for !DEBUG kernels. Signed-off-by:
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Peter Zijlstra authored
For some obscure reason the current code accounts the current SMT thread's state on the remote thread and reads the remote's state on the local SMT thread. While internally consistent, and 'correct' its pointless confusion we can do without. Flip them the right way around. Signed-off-by:
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Matt Fleming authored
Since we write RMID values to MSRs the correct type to use is 'u32' because that clearly articulates we're writing a hardware register value. Fix up all uses of RMID in this code to consistently use the correct data type. Reported-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Matt Fleming <matt.fleming@intel.com> Signed-off-by:
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Thomas Gleixner authored
'closid' (CLass Of Service ID) is used for the Class based Cache Allocation Technology (CAT). Add explicit storage to the per cpu cache for it, so it can be used later with the CAT support (requires to move the per cpu data). While at it: - Rename the structure to intel_pqr_state which reflects the actual purpose of the struct: cache values which go into the PQR MSR - Rename 'cnt' to rmid_usecnt which reflects the actual purpose of the counter. - Document the structure and the struct members. Signed-off-by:
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Thomas Gleixner authored
intel_cqm_event_del() is a 1:1 wrapper for intel_cqm_event_stop(). Remove the useless indirection. Signed-off-by:
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Thomas Gleixner authored
If the usage counter is non-zero there is no point to update the rmid in the PQR MSR. Signed-off-by:
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Thomas Gleixner authored
'struct intel_cqm_state' is a strict per CPU cache of the rmid and the usage counter. It can never be modified from a remote CPU. The three functions which modify the content: intel_cqm_event[start|stop|del] (del maps to stop) are called from the perf core with interrupts disabled which is enough protection for the per CPU state values. Signed-off-by:
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Thomas Gleixner authored
'int' is really not a proper data type for an MSR. Use u32 to make it clear that we are dealing with a 32-bit unsigned hardware value. Signed-off-by:
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