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2014-10-12Merge tag 'kselftest-3.18-updates-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest updates from Shuah Khan: - fix for missing arguments to printf - fix to build failures on 32-bit systems. - enhancement to run memfd_test run on all architectures as most architectures support __NR_memfd_create * tag 'kselftest-3.18-updates-1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/memfd: Run test on all architectures memfd_test: Add missing argument to printf() memfd_test: Make it work on 32-bit systems
2014-10-12Merge tag 'ftracetest-3.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull ftrace test code from Steven Rostedt: "This patch series starts a new selftests section in the tools/testing/selftest directory called "ftrace" that holds tests aimed at testing ftrace and subsystems that use ftrace (like kprobes). So far only a few tests were written (by Masami Hiramatsu), but more will be added in the near future (3.19)" * tag 'ftracetest-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/kprobes: Add selftest scripts testing kprobe-tracer as startup test ftracetest: Add POSIX.3 standard and XFAIL result codes ftracetest: Add kprobe basic testcases ftracetest: Add ftrace basic testcases ftracetest: Initial commit for ftracetest
2014-10-12Merge tag 'ktest-v3.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest Pull ktest update from Steven Rostedt: "A fix and a clean up to ktest, as well as two small features. - A way to allow users to skip a manual bisect. - Allowing cherry picked patches to be tested. The cherry pick worked for a test I needed, but stressing it may not have all the desired effects. It doesn't cause any regressions so I kept it in" * tag 'ktest-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest: ktest: Don't bother with bisect good or bad on replay ktest: Fix check for new kernel success on rebooting to good kernel ktest: add ability to skip during BISECT_MANUAL ktest: Add PATCHCHECK_CHERRY
2014-10-11Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc updates from Michael Ellerman: "Here's a first pull request for powerpc updates for 3.18. The bulk of the additions are for the "cxl" driver, for IBM's Coherent Accelerator Processor Interface (CAPI). Most of it's in drivers/misc, which Greg & Arnd maintain, Greg said he was happy for us to take it through our tree. There's the usual minor cleanups and fixes, including a bit of noise in drivers from some of those. A bunch of updates to our EEH code, which has been getting more testing. Several nice speedups from Anton, including 20% in clear_page(). And a bunch of updates for freescale from Scott" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (130 commits) cxl: Fix afu_read() not doing finish_wait() on signal or non-blocking cxl: Add documentation for userspace APIs cxl: Add driver to Kbuild and Makefiles cxl: Add userspace header file cxl: Driver code for powernv PCIe based cards for userspace access cxl: Add base builtin support powerpc/mm: Add hooks for cxl powerpc/opal: Add PHB to cxl mode call powerpc/mm: Add new hash_page_mm() powerpc/powerpc: Add new PCIe functions for allocating cxl interrupts cxl: Add new header for call backs and structs powerpc/powernv: Split out set MSI IRQ chip code powerpc/mm: Export mmu_kernel_ssize and mmu_linear_psize powerpc/msi: Improve IRQ bitmap allocator powerpc/cell: Make spu_flush_all_slbs() generic powerpc/cell: Move data segment faulting code out of cell platform powerpc/cell: Move spu_handle_mm_fault() out of cell platform powerpc/pseries: Use new defines when calling H_SET_MODE powerpc: Update contact info in Documentation files powerpc/perf/hv-24x7: Simplify catalog_read() ...
2014-10-10perf ui browsers: Add missing includeArnaldo Carvalho de Melo
This file needs the K_{RIGHT,etc} definitions but isn't including the file where they are defined, ui/keysyms.h, fix 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: Jean Pihet <jean.pihet@linaro.org> 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-jlpybqegpdauzx64l9r1jgm3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-10perf tools: Move events_stats struct to event.hArnaldo Carvalho de Melo
This is the only bit of hist.h that session.[ch] will end up using, so move it out of hist.h to make that abundantly clear. 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: Jean Pihet <jean.pihet@linaro.org> 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-l9ftsl21ggw0c1g2ig87otmd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-10perf session: Don't count per evsel eventsArnaldo Carvalho de Melo
PERF_RECORD_SAMPLE was not being counted here and is the only per-evsel thing anyway, the other events were not mapping to a evsel. With this we don't require that evsels used with a perf_session need to have space for hists, like the ones in annotate, report, top. 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: Jean Pihet <jean.pihet@linaro.org> 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-kzchpz0l1mhrsfpkirz086m2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-09selftests/vm/transhuge-stress: stress test for memory compactionKonstantin Khlebnikov
This tool induces memory fragmentation via sequential allocation of transparent huge pages and splitting off everything except their last sub-pages. It easily generates pressure to the memory compaction code. $ perf stat -e 'compaction:*' -e 'migrate:*' ./transhuge-stress transhuge-stress: allocate 7858 transhuge pages, using 15716 MiB virtual memory and 61 MiB of ram transhuge-stress: 1.653 s/loop, 0.210 ms/page, 9504.828 MiB/s 7858 succeed, 0 failed, 2439 different pages transhuge-stress: 1.537 s/loop, 0.196 ms/page, 10226.227 MiB/s 7858 succeed, 0 failed, 2364 different pages transhuge-stress: 1.658 s/loop, 0.211 ms/page, 9479.215 MiB/s 7858 succeed, 0 failed, 2179 different pages transhuge-stress: 1.617 s/loop, 0.206 ms/page, 9716.992 MiB/s 7858 succeed, 0 failed, 2421 different pages ^C./transhuge-stress: Interrupt Performance counter stats for './transhuge-stress': 1.744.051 compaction:mm_compaction_isolate_migratepages 1.014 compaction:mm_compaction_isolate_freepages 1.744.051 compaction:mm_compaction_migratepages 1.647 compaction:mm_compaction_begin 1.647 compaction:mm_compaction_end 1.744.051 migrate:mm_migrate_pages 0 migrate:mm_numa_migrate_ratelimit 7,964696835 seconds time elapsed Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Rafael Aquini <aquini@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09mm/balloon_compaction: add vmstat counters and kpageflags bitKonstantin Khlebnikov
Always mark pages with PageBalloon even if balloon compaction is disabled and expose this mark in /proc/kpageflags as KPF_BALLOON. Also this patch adds three counters into /proc/vmstat: "balloon_inflate", "balloon_deflate" and "balloon_migrate". They accumulate balloon activity. Current size of balloon is (balloon_inflate - balloon_deflate) pages. All generic balloon code now gathered under option CONFIG_MEMORY_BALLOON. It should be selected by ballooning driver which wants use this feature. Currently virtio-balloon is the only user. Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com> Cc: Rafael Aquini <aquini@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09perf evsel: Add hists helperArnaldo Carvalho de Melo
Not all tools need a hists instance per perf_evsel, so lets pave the way to remove evsel->hists while leaving a way to access the hists from a specially allocated evsel, one that comes with space at the end where lives the evsel. 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: Jean Pihet <jean.pihet@linaro.org> 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-qlktkhe31w4mgtbd84035sr2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-09perf script: Stop updating hists stats, not usedArnaldo Carvalho de Melo
Not used here, remove to reduce perf_evsel/hists structs interaction. 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: Jean Pihet <jean.pihet@linaro.org> 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-zzmoo39yalrl9hzu9nc2xqml@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-09perf sched: Stop updating hists stats, not usedArnaldo Carvalho de Melo
Not used here, remove to reduce perf_evsel/hists structs interaction. 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: Jean Pihet <jean.pihet@linaro.org> 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-cb7wkk4a3jpoovzim914ih3c@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-09Merge branch 'rcu/next' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull additional commits for locktorture, from Paul E. McKenney. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-09saner perf_atoll()Al Viro
That loop in there is both anti-idiomatic *and* completely pointless. strtoll() is there for purpose; use it and compare what's left with acceptable suffices. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-08tracing/kprobes: Add selftest scripts testing kprobe-tracer as startup testMasami Hiramatsu
Add two selftest scripts which tests kprobe-tracer as the startup selftest does. These test cases are testing that the kprobe_event can accept a kprobe event with $stack related arguments and a kretprobe event with $retval argument. Link: http://lkml.kernel.org/p/20141008040307.13415.45145.stgit@kbuild-f20.novalocal Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-10-08Merge tag 'usb-3.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB updates from Greg KH: "Here's the big USB patchset for 3.18-rc1. Also in here is the PHY tree, as it seems to fit well with the USB tree for various reasons... Anyway, lots of little changes in here, all over the place, full details in the changelog All have been in the linux-next tree for a while with no issues" * tag 'usb-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (244 commits) USB: host: st: fix typo 'CONFIG_USB_EHCI_HCD_ST' uas: Reduce number of function arguments for uas_alloc_foo functions xhci: Allow xHCI drivers to be built as separate modules xhci: Export symbols used by host-controller drivers xhci: Check for XHCI_COMP_MODE_QUIRK when disabling D3cold xhci: Introduce xhci_init_driver() usb: hcd: add generic PHY support usb: rename phy to usb_phy in HCD usb: gadget: uvc: fix up uvcg_v4l2_get_unmapped_area typo USB: host: st: fix ehci/ohci driver selection usb: host: ehci-exynos: Remove unnecessary usb-phy support usb: core: return -ENOTSUPP for all targeted hosts USB: Remove .owner field for driver usb: core: log higher level message on malformed LANGID descriptor usb: Add LED triggers for USB activity usb: Rename usb-common.c usb: gadget: Refactor request completion usb: gadget: Introduce usb_gadget_giveback_request() usb: dwc2/gadget: move phy bus legth initialization phy: remove .owner field for drivers using module_platform_driver ...
2014-10-07ktest: Don't bother with bisect good or bad on replaySteven Rostedt (Red Hat)
If git bisect reply is being used in the bisect tests, don't bother doing the git bisect good or git bisect bad calls. The git bisect reply will override them anyway, and that's called immediately after the other two. Going the git bisect (good|bad) is just a waste of time. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-10-07ktest: Fix check for new kernel success on rebooting to good kernelSteven Rostedt (Red Hat)
The reboot function when rebooting back to a good kernel has a check to make sure that a new kernel was indeed booted. But that check uses a timeout value, which when calling the monitor will still return success if the timeout is hit (no bug was found). It should return an error to let the reboot code know that a new kernel was not reached. Only the reboot code checks the return value of the monitor. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-10-03ftracetest: Add POSIX.3 standard and XFAIL result codesMasami Hiramatsu
Add XFAIL and POSIX 1003.3 standard codes (UNRESOLVED/ UNTESTED/UNSUPPORTED) as result codes. These are used for the results that test case is expected to fail or unsupported feature (by config). To return these result code, this introduces exit_unresolved, exit_untested, exit_unsupported and exit_xfail functions, which use real-time signals to notify the result code to ftracetest. This also set "errexit" option for the testcases, so that the tests don't need to exit explicitly. Note that if the test returns UNRESOLVED/UNSUPPORTED/FAIL, its test log including executed commands is shown on console and main logfile as below. ------ # ./ftracetest samples/ === Ftrace unit tests === [1] failure-case example [FAIL] execute: /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/fail.tc + . /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/fail.tc ++ cat non-exist-file cat: non-exist-file: No such file or directory [2] pass-case example [PASS] [3] unresolved-case example [UNRESOLVED] execute: /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/unresolved.tc + . /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/unresolved.tc ++ trap exit_unresolved INT ++ kill -INT 29324 +++ exit_unresolved +++ kill -s 38 29265 +++ exit 0 [4] unsupported-case example [UNSUPPORTED] execute: /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/unsupported.tc + . /home/fedora/ksrc/linux-3/tools/testing/selftests/ftrace/samples/unsupported.tc ++ exit_unsupported ++ kill -s 40 29265 ++ exit 0 [5] untested-case example [UNTESTED] [6] xfail-case example [XFAIL] # of passed: 1 # of failed: 1 # of unresolved: 1 # of untested: 1 # of unsupported: 1 # of xfailed: 1 # of undefined(test bug): 0 ------ Link: http://lkml.kernel.org/p/20140929120211.30203.99510.stgit@kbuild-f20.novalocal Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-10-03perf callchain: Move callchain_param to util object in to fix python testJiri Olsa
In following commit we changed the location of callchains data: 72a128aa083a7f4cc4f800718aaae05d9c698e26 perf tools: Move callchain config from record_opts to callchain_param Now all callchains stuff stays in callchain_param struct, which adds its dependency for evsel.c object and breaks python perf.so usage (unresolved callchain_param). Moving callchain_param into callchain.c and adding it into python-ext-sources unleash just another dependency hell, so I ended up adding callchain_param into util.c for now. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.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: Milian Wolff <mail@milianw.de> 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/1412179229-19466-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-03perf kvm stat live: Use fdarray object instead of pollfdJiri Olsa
The reason is that we don't need to count the number of file descriptors because it's already handled in fdarray object. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.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: Milian Wolff <mail@milianw.de> 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/1412179229-19466-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-03perf kvm stat live: Use perf_evlist__add_pollfd return fd positionJiri Olsa
With the interface changed in following commit: 2171a9256862 tools lib fd array: Allow associating an integer cookie with each entry the perf_evlist__add_pollfd function now returns the fd position in the pollfd array. Hence we no longer need to count the fd position, because we get it as the return value. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.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: Milian Wolff <mail@milianw.de> 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/1412179229-19466-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-03perf kvm stat live: Fix perf_evlist__add_pollfd error handlingJiri Olsa
With the interface changed in following commit: 2171a9256862 tools lib fd array: Allow associating an integer cookie with each entry the perf_evlist__add_pollfd function now returns the fd position in the pollfd array. We need to change this function's error check condition. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.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: Milian Wolff <mail@milianw.de> 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/1412179229-19466-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-01perf record: Fix error message for --filter option not coming after tracepointArnaldo Carvalho de Melo
[root@zoo ~]# perf record --filter "common_pid != PERF_PID" -a -F option should follow a -e tracepoint option. The -F option is for --freq, not --filter. Fix it up to show: [root@zoo ~]# perf record --filter "common_pid != PERF_PID" -a --filter option should follow a -e tracepoint option Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> 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: 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-z0yrm8stn9w3423nkov3eksg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-01perf tools: Fix build breakage on arm64 targetsWill Deacon
Attempting to build the perf tool for an arm64 target results in the following failure: arch/arm64/util/unwind-libunwind.c: In function 'libunwind__arch_reg_id': arch/arm64/util/unwind-libunwind.c:77:3: error: implicit declaration of function 'pr_err' pr_err("unwind: invalid reg id %d\n", regnum); ^ arch/arm64/util/unwind-libunwind.c:77:3: error: nested extern declaration of 'pr_err' This is due to commit 84f5d36f4866 ("perf tools: Move pr_* debug macros into debug object") moving the pr_* macros into a new header file, but failing to update architectures other than x86. This patch adds the missing include, and fixes the build again. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1412076432-22045-1-git-send-email-will.deacon@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-01perf symbols: Improve DSO long names lookup speed with rbtreeWaiman Long
With workload that spawns and destroys many threads and processes, it was found that perf-mem could took a long time to post-process the perf data after the target workload had completed its operation. The performance bottleneck was found to be the lookup and insertion of the new DSO structures (thousands of them in this case). In a dual-socket Ivy-Bridge E7-4890 v2 machine (30-core, 60-thread), the perf profile below shows what perf was doing after the profiled AIM7 shared workload completed: - 83.94% perf libc-2.11.3.so [.] __strcmp_sse42 - __strcmp_sse42 - 99.82% map__new machine__process_mmap_event perf_session_deliver_event perf_session__process_event __perf_session__process_events cmd_record cmd_mem run_builtin main __libc_start_main - 13.17% perf perf [.] __dsos__findnew __dsos__findnew map__new machine__process_mmap_event perf_session_deliver_event perf_session__process_event __perf_session__process_events cmd_record cmd_mem run_builtin main __libc_start_main So about 97% of CPU times were spent in the map__new() function trying to insert new DSO entry into the DSO linked list. The whole post-processing step took about 9 minutes. The DSO structures are currently searched linearly. So the total processing time will be proportional to n^2. To overcome this performance problem, the DSO code is modified to also put the DSO structures in a RB tree sorted by its long name in additional to being in a simple linked list. With this change, the processing time will become proportional to n*log(n) which will be much quicker for large n. However, the short name will still be searched using the old linear searching method. With that patch in place, the same perf-mem post-processing step took less than 30 seconds to complete. Signed-off-by: Waiman Long <Waiman.Long@hp.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Douglas Hatch <doug.hatch@hp.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hp.com> Link: http://lkml.kernel.org/r/1412098575-27863-3-git-send-email-Waiman.Long@hp.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-30perf symbols: Encapsulate dsos list head into struct dsosWaiman Long
This is a precursor patch to enable long name searching of DSOs using a rbtree. In this patch, a new dsos structure is created which contains only a list head structure for the moment. The new dsos structure is used, in turn, in the machine structure for the user_dsos and kernel_dsos fields. Only the following 3 dsos functions are modified to accept the new dsos structure parameter instead of list_head: - dsos__add() - dsos__find() - __dsos__findnew() Signed-off-by: Waiman Long <Waiman.Long@hp.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Douglas Hatch <doug.hatch@hp.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hp.com> Link: http://lkml.kernel.org/r/1412021249-19201-2-git-send-email-Waiman.Long@hp.com [ Move struct dsos to dso.h to reduce the dso methods depends on machine.h ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-30locktorture: Support rwlocksDavidlohr Bueso
Add a "rw_lock" torture test to stress kernel rwlocks and their irq variant. Reader critical regions are 5x longer than writers. As such a similar ratio of lock acquisitions is seen in the statistics. In the case of massive contention, both hold the lock for 1/10 of a second. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-09-30selftests/powerpc: Add test of load_unaligned_zero_pad()Michael Ellerman
It is a rarely exercised case, so we want to have a test to ensure it works as required. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-29perf bench futex: Sanitize -q option in requeueDavidlohr Bueso
When given the number of threads to requeue at once by user input, there's always the risk of this value being larger than the total number of threads. This doesn't make any sense, and the kernel can easily deal with such sort of situations, hence no big deal. We should however prevent bogus output such as: ./perf bench --repeat 2 futex requeue -q 10 Run summary [PID 22210]: Requeuing 4 threads (from [private] 0x99ef3c to 0x99ef38), 10 at a time. [Run 1]: Requeued 10 of 4 threads in 0.0040 ms [Run 2]: Requeued 10 of 4 threads in 0.0030 ms Requeued 10 of 4 threads in 0.0035 ms (+-14.29%) Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Link: http://lkml.kernel.org/r/1412008868-22328-2-git-send-email-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-29perf bench futex: Support operations for shared futexesDavidlohr Bueso
Unlike futex-hash, requeuing and wakeup benchmarks do not support shared futexes, limiting the usefulness of the programs. Correct this, and allow using the local -S parameter. The default remains using private futexes. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Link: http://lkml.kernel.org/r/1412008868-22328-1-git-send-email-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-29perf trace: Fix mmap return address truncation to 32-bitChang Hyun Park
Using 'perf trace' for mmap is truncating return values by stripping the top 32 bits, actually printing only the lower 32 bits. This was because the ret value was of an 'int' type and not a 'long' type. The Problem: 991258501.244 ( 0.004 ms): mmap(len: 40001536, prot: READ|WRITE, flags: PRIVATE|ANONYMOUS, fd: -1) = 0x56691000 991258501.257 ( 0.000 ms): minfault [_int_malloc+0x1038] => //anon@0x7fa056691008 //(d.) The first line shows an mmap, which succeeds and returns 0x56691000. However the next line shows a memory access to that virtual memory area, specifically to 0x7fa056691008. The upper 32 bit is lost due to the problem mentioned above, and thus mmap's return value didn't have the upper 0x7fa0. Tested on 3.17-rc5 from the linus's tree, and the HEAD of tip/master Signed-off-by: Chang Hyun Park <heartinpiece@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1411736041-8017-1-git-send-email-heartinpiece@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-29perf tools: Refactor unit and scale function parametersMatt Fleming
Passing pointers to alias modifiers 'unit' and 'scale' isn't very future-proof since if we add more modifiers to the list we'll end up passing more arguments. Instead wrap everything up in a struct perf_pmu_info, which can easily be expanded when additional alias modifiers are necessary in the future. Signed-off-by: Matt Fleming <matt.fleming@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1411567455-31264-3-git-send-email-matt@console-pimps.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Fix line number in the config file error messageJiri Olsa
If we fail to parse the config file within the callback function, the line number counter 'could be' already on the next line. This results in wrong line number report like: $ cat ~/.perfconfig [call-graph] sort-key = krava $ perf record ls Fatal: bad config file line 3 in /home/jolsa/.perfconfig Fixing this by saving the current line number for this case. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Milian Wolff <mail@milianw.de> 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/20140923115656.GC2979@krava.brq.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Convert {record,top}.call-graph option to call-graph.record-modeNamhyung Kim
So that it'll be passed to perf_callchain_config(). Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Milian Wolff <mail@milianw.de> 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/1411434104-5307-6-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Introduce perf_callchain_config()Namhyung Kim
This patch adds support for following config options to ~/.perfconfig file. [call-graph] record-mode = dwarf dump-size = 8192 print-type = fractal order = callee threshold = 0.5 print-limit = 128 sort-key = function Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Milian Wolff <mail@milianw.de> 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/1411434104-5307-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf callchain: Move some parser functions to callchain.cNamhyung Kim
And rename record_callchain_parse() to parse_callchain_record_opt() in accordance to parse_callchain_report_opt(). Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Milian Wolff <mail@milianw.de> 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/1411434104-5307-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Move callchain config from record_opts to callchain_paramNamhyung Kim
So that all callchain config parameters can be read/written to a single place. It's a preparation to consolidate handling of all callchain options. Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Milian Wolff <mail@milianw.de> 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/1411434104-5307-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf hists browser: Fix callchain print bug on TUINamhyung Kim
Currently perf report -g graph option doesn't work as expected and always work as same as -g fractal. This was a bug during recent callchain print code cleanup. Before: $ perf report -g graph Children Self Command Shared Object Symbol ================================================================ - 56.19% 35.41% sleep [kernel.kallsyms] [k] page_fault - page_fault + 63.02% _dl_relocate_object + 36.98% clear_user After: Children Self Command Shared Object Symbol ================================================================ - 56.19% 35.41% sleep [kernel.kallsyms] [k] page_fault - page_fault + 35.41% _dl_relocate_object + 20.78% clear_user Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Milian Wolff <mail@milianw.de> 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/1411434104-5307-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Use ACCESS_ONCE() instead of volatile castPranith Kumar
Use ACCESS_ONCE() instead of the cast to volatile and read. This is just a style change which is reader friendly. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@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/1411484109-10442-1-git-send-email-bobby.prani@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Modify error code for when perf_session__new() failsTaeung Song
Because perf_session__new() can fail for more reasons than just ENOMEM, modify error code(ENOMEM or EINVAL) to -1. Signed-off-by: Taeung Song <treeze.taeung@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1411522417-9917-1-git-send-email-treeze.taeung@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf tools: Fix perf record as non root with kptr_restrict == 1Andi Kleen
Currently perf record always errors out when you run it as non-root with kptr_restrict == 1, which is often the default. Make it only warn instead and fix the kernel resolve code to not segfault later. Profiling works still fine, except kernel symbols are not resolved. Signed-off-by: Andi Kleen <ak@linux.intel.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> Link: http://lkml.kernel.org/r/1411594794-7229-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26perf stat: Fix --per-core on multi socket systemsAndi Kleen
On systems with more than one socket perf stat --per-core would either segfault or stop before outputting all cores. The problem was that the output code referenced the id including the socket number in the higher bits, which is far beyond any per cpu array. Mask out the socket number before referencing cpus in abs_printout. I also renamed the variable in nsec_printout to be clear what it is, even though it doesn't reference cpus. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Stephane Eranian <eranian@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1411591846-32736-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-26tools: add more endian.h macrosPeter Foley
Add some more macros to tools/endian.h to allow mpssd to be compiled against glibc < 2.9. Signed-off-by: Peter Foley <pefoley2@pefoley.com> Cc: rdunlap@infradead.org Cc: linux-doc@vger.kernel.org Cc: sudeep.dutt@intel.com Cc: nikhil.rao@intel.com Cc: ashutosh.dixit@intel.com Cc: akpm@linux-foundation.org Cc: gregkh@linuxfoundation.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-09-26Documentation: support glibc versions without htole macrosPeter Foley
glibc 2.9 introduced the htole<16/32/64> macros, add them to tools/include to support older versions of glibc. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Peter Foley <pefoley2@pefoley.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-09-25perf trace: Filter out POLLHUP'ed file descriptorsArnaldo Carvalho de Melo
So that we don't continue polling on vanished file descriptors, i.e. file descriptors for events monitoring threads that exited. I.e. the following 'trace' command now exits as expected, instead of staying in an eternal loop: $ sleep 5s & $ trace -p `pidof sleep` Reported-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> 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: 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-6qegv786zbf6i8us6t4rxug9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-25perf record: Filter out POLLHUP'ed file descriptorsArnaldo Carvalho de Melo
So that we don't continue polling on vanished file descriptors, i.e. file descriptors for events monitoring threads that exited. I.e. the following 'perf record' command now exits as expected, instead of staying in an eternal loop: $ sleep 5s & $ perf record -p `pidof sleep` Reported-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> 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: 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-8dg8o21t2ntzly2bfh53p3sg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-25perf evlist: Unmap when all refcounts to fd are gone and events drainedArnaldo Carvalho de Melo
As noticed by receiving a POLLHUP for all its pollfd entries. That will remove the refcount taken in perf_evlist__mmap_per_evsel(), and when all events are consumed via perf_evlist__mmap_read() + perf_evlist__mmap_consume(), the ring buffer will be unmap'ed. Thanks to Jiri Olsa for pointing out that we must wait till all events are consumed, not being ok to unmmap just when receiving all the POLLHUPs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> 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: Jiri Olsa <jolsa@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/n/tip-t10w1xk4myp7ca7m9fvip6a0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-09-25tools lib fd array: Allow associating an integer cookie with each entryArnaldo Carvalho de Melo
We will use this in perf's evlist class so that it can, at fdarray__filter() time, to unmap the associated ring buffer. We may need to have further info associated with each fdarray entry, in that case we'll make that int array a 'union fdarray_priv' one and put a pointer there so that users can stash whatever they want there. For now, an int is enough tho. v2: Add clarification to the per array entry priv area, as well as make it a union, which makes usage a bit longer, but if/when we make it use more space by allowing per entry pointers existing users source code will not have to be changed, just rebuilt. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> 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: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lkml.kernel.org/n/tip-0p00bn83quck3fio3kcs9vca@git.kernel.org
2014-09-25perf evlist: Refcount mmapsArnaldo Carvalho de Melo
We need to know how many fds are using a perf mmap via PERF_EVENT_IOC_SET_OUTPUT, so that we can know when to ditch an mmap, refcount it. v2: Automatically unmap it when the refcount hits one, which will happen when all fds are filtered by perf_evlist__filter_pollfd(), in later patches. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> 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: Jiri Olsa <jolsa@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/20140908153824.GG2773@kernel.org Link: http://lkml.kernel.org/n/tip-cpv7v2lw0g74ucmxa39xdpms@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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