04 Mar, 2013
1 commit
-
Pull new ImgTec Meta architecture from James Hogan:
"This adds core architecture support for Imagination's Meta processor
cores, followed by some later miscellaneous arch/metag cleanups and
fixes which I kept separate to ease review:- Support for basic Meta 1 (ATP) and Meta 2 (HTP) core architecture
- A few fixes all over, particularly for symbol prefixes
- A few privilege protection fixes
- Several cleanups (setup.c includes, split out a lot of
metag_ksyms.c)
- Fix some missing exports
- Convert hugetlb to use vm_unmapped_area()
- Copy device tree to non-init memory
- Provide dma_get_sgtable()"* tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: (61 commits)
metag: Provide dma_get_sgtable()
metag: prom.h: remove declaration of metag_dt_memblock_reserve()
metag: copy devicetree to non-init memory
metag: cleanup metag_ksyms.c includes
metag: move mm/init.c exports out of metag_ksyms.c
metag: move usercopy.c exports out of metag_ksyms.c
metag: move setup.c exports out of metag_ksyms.c
metag: move kick.c exports out of metag_ksyms.c
metag: move traps.c exports out of metag_ksyms.c
metag: move irq enable out of irqflags.h on SMP
genksyms: fix metag symbol prefix on crc symbols
metag: hugetlb: convert to vm_unmapped_area()
metag: export clear_page and copy_page
metag: export metag_code_cache_flush_all
metag: protect more non-MMU memory regions
metag: make TXPRIVEXT bits explicit
metag: kernel/setup.c: sort includes
perf: Enable building perf tools for Meta
metag: add boot time LNKGET/LNKSET check
metag: add __init to metag_cache_probe()
...
03 Mar, 2013
1 commit
-
Define rmb(), cpu_relax(), and CPUINFO_PROC for Meta so that the perf
tools can be built for Meta.Signed-off-by: James Hogan
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Ingo Molnar
Cc: Arnaldo Carvalho de Melo
02 Mar, 2013
1 commit
-
Pull new ARC architecture from Vineet Gupta:
"Initial ARC Linux port with some fixes on top for 3.9-rc1:I would like to introduce the Linux port to ARC Processors (from
Synopsys) for 3.9-rc1. The patch-set has been discussed on the public
lists since Nov and has received a fair bit of review, specially from
Arnd, tglx, Al and other subsystem maintainers for DeviceTree, kgdb...The arch bits are in arch/arc, some asm-generic changes (acked by
Arnd), a minor change to PARISC (acked by Helge).The series is a touch bigger for a new port for 2 main reasons:
1. It enables a basic kernel in first sub-series and adds
ptrace/kgdb/.. later2. Some of the fallout of review (DeviceTree support, multi-platform-
image support) were added on top of orig series, primarily to
record the revision history.This updated pull request additionally contains
- fixes due to our GNU tools catching up with the new syscall/ptrace
ABI- some (minor) cross-arch Kconfig updates."
* tag 'arc-v3.9-rc1-late' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (82 commits)
ARC: split elf.h into uapi and export it for userspace
ARC: Fixup the current ABI version
ARC: gdbserver using regset interface possibly broken
ARC: Kconfig cleanup tracking cross-arch Kconfig pruning in merge window
ARC: make a copy of flat DT
ARC: [plat-arcfpga] DT arc-uart bindings change: "baud" => "current-speed"
ARC: Ensure CONFIG_VIRT_TO_BUS is not enabled
ARC: Fix pt_orig_r8 access
ARC: [3.9] Fallout of hlist iterator update
ARC: 64bit RTSC timestamp hardware issue
ARC: Don't fiddle with non-existent caches
ARC: Add self to MAINTAINERS
ARC: Provide a default serial.h for uart drivers needing BASE_BAUD
ARC: [plat-arcfpga] defconfig for fully loaded ARC Linux
ARC: [Review] Multi-platform image #8: platform registers SMP callbacks
ARC: [Review] Multi-platform image #7: SMP common code to use callbacks
ARC: [Review] Multi-platform image #6: cpu-to-dma-addr optional
ARC: [Review] Multi-platform image #5: NR_IRQS defined by ARC core
ARC: [Review] Multi-platform image #4: Isolate platform headers
ARC: [Review] Multi-platform image #3: switch to board callback
...
16 Feb, 2013
1 commit
-
Although with uClibc there's more we need to do
Signed-off-by: Vineet Gupta
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Ingo Molnar
Cc: Arnaldo Carvalho de Melo
07 Feb, 2013
1 commit
-
I am getting segfaults *after* the time sorting of perf samples where
the event type is off the charts:(gdb) bt
\#0 0x0807b1b2 in hists__inc_nr_events (hists=0x80a99c4, type=1163281902) at util/hist.c:1225
\#1 0x08070795 in perf_session_deliver_event (session=0x80a9b90, event=0xf7a6aff8, sample=0xffffc318, tool=0xffffc520,
file_offset=0) at util/session.c:884
\#2 0x0806f9b9 in flush_sample_queue (s=0x80a9b90, tool=0xffffc520) at util/session.c:555
\#3 0x0806fc53 in process_finished_round (tool=0xffffc520, event=0x0, session=0x80a9b90) at util/session.c:645This is bizarre because the event has already been processed once --
before it was added to the samples queue -- and the event was found to
be sane at that time.There seem to be 2 causes:
1. perf_evlist__mmap_read updates the read location even though there
are outstanding references to events sitting in the mmap buffers via the
ordered samples queue.2. There is a single evlist->event_copy for all evlist entries.
event_copy is used to handle an event wrapping at the mmap buffer
boundary.This patch addresses the second problem - making event_copy local to
each perf_mmap. With this change my highly repeatable use case no longer
fails.The first problem is much more complicated and will be the subject of a
future patch.Signed-off-by: David Ahern
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1360098762-61827-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo
25 Jan, 2013
2 commits
-
It is used by util/help.c so it should be a lib function and included in
libperf.a. Code move only.Signed-off-by: David Ahern
Link: http://lkml.kernel.org/r/1358185681-90926-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo -
Instead of doing it in stat, top, record or any other tool that opens
event descriptors.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Mike Galbraith
Cc: Namhyung Kim
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-vr8hzph83d5t2mdlkf565h84@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
08 Dec, 2012
1 commit
-
Conflicts:
tools/perf/Makefile
tools/perf/builtin-test.c
tools/perf/perf.h
tools/perf/tests/parse-events.c
tools/perf/util/evsel.hSigned-off-by: Ingo Molnar
20 Nov, 2012
2 commits
-
Make perf build for x86 once the UAPI disintegration patches for that arch
have been applied by adding the appropriate -I flags - in the right order -
and then converting some #includes that use ../.. notation to find main kernel
headerfiles to use and instead.Note that -Iarch/foo/include/uapi is present _before_ -Iarch/foo/include.
This makes sure we get the userspace version of the pt_regs struct. Ideally,
we wouldn't have the latter -I flag at all, but unfortunately we want
asm/svm.h and asm/vmx.h in builtin-kvm.c and these aren't part of the UAPI -
at least not for x86. I wonder if the bits outside of the __KERNEL__ guards
*should* be transferred there.I note also that perf seems to do its dependency handling manually by listing
all the header files it might want to use in LIB_H in the Makefile. Can this
be changed to use -MD?Note that to do make this work, we need to export and UAPI disintegrate
linux/hw_breakpoint.h, which I think should've been exported previously so that
perf can access the bits. We have to do this in the same patch to maintain
bisectability.Signed-off-by: David Howells
-
Use the 'unistd.h' from arch/powerpc/include/uapi to build the perf tool.
Signed-off-by: Sukadev Bhattiprolu
Acked-by: David Howells
Cc: Anton Blanchard
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Robert Richter
Cc: linuxppc-dev@ozlabs.org
Link: http://lkml.kernel.org/r/20121107191818.GA16211@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo
15 Nov, 2012
2 commits
-
Use the 'unistd.h' from arch/powerpc/include/uapi to build the perf tool.
Signed-off-by: Sukadev Bhattiprolu
Acked-by: David Howells
Cc: Anton Blanchard
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Robert Richter
Cc: linuxppc-dev@ozlabs.org
Link: http://lkml.kernel.org/r/20121107191818.GA16211@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo -
Final function renames to match test__* style and include cleanup.
Signed-off-by: Jiri Olsa
Cc: Corey Ashford
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1352508412-16914-12-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo
02 Nov, 2012
1 commit
-
The test attr suite is run only if it's run under perf source directory,
or tests are found in installed path.Otherwise tests are omitted (notification is displayed) and finished as
successful.Signed-off-by: Jiri Olsa
Cc: Corey Ashford
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1351634526-1516-25-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo
01 Nov, 2012
1 commit
-
The idea is run perf session with kidnapping sys_perf_event_open
function. For each sys_perf_event_open call we store the perf_event_attr
data to the file to be checked later against what we expect.You can run this by:
$ python ./tests/attr.py -d ./tests/attr/ -p ./perf -vv2 changes:
- preserve errno value in the hookSigned-off-by: Jiri Olsa
Cc: Arnaldo Carvalho de Melo
Cc: Corey Ashford
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20121031145247.GB1027@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo
29 Oct, 2012
1 commit
-
Currently many perf commands annotate/evlist/report/script/lock etc all
support "-i" option to chose a specific perf data, and all of them
create a local "input_name" to save the file name for that perf data.Since most of these commands need it, we can add a global variable for
it, also it can some other benefits:1. When calling script browser inside hists/annotation browser, it needs
to know the perf data file name to run that script.2. For further feature like runtime switching to another perf data file,
this variable can also help.Signed-off-by: Feng Tang
Cc: Andi Kleen
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1351569369-26732-2-git-send-email-feng.tang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo
20 Oct, 2012
1 commit
-
…it/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
* The python binding needs to link with libtraceevent and to initialize
the 'page_size' variable so that mmaping works again.* The callchain folding character that appears on the TUI just before
the overhead had disappeared due to recent changes, add it back.* Intel PEBS in VT-x context uses the DS address as a guest linear address,
even though its programmed by the host as a host linear address. This either
results in guest memory corruption and or the hardware faulting and 'crashing'
the virtual machine. Therefore we have to disable PEBS on VT-x enter and
re-enable on VT-x exit, enforcing a strict exclude_guest.Kernel side enforcement fix by Peter Zijlstra, tooling side fix by David Ahern.
* Fix build on sparc due to UAPI, fix from David Miller.
* Fixes for the srclike sort key for unresolved symbols and when processing
samples in JITted code, where we don't have an ELF file, just an special
symbol table, fixes from Namhyung Kim.* Fix some leaks in libtraceevent, from Steven Rostedt.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
17 Oct, 2012
1 commit
-
More UAPI stuff.
Signed-off-by: David S. Miller
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20121017.010656.383828471689899431.davem@davemloft.net
Signed-off-by: Arnaldo Carvalho de Melo
15 Oct, 2012
1 commit
-
The UAPI commits forgot to test tooling builds such as tools/perf/,
and this fixes the fallout.Manual conversion.
Signed-off-by: Ingo Molnar
Signed-off-by: Linus Torvalds
02 Oct, 2012
1 commit
-
Pull arm64 support from Catalin Marinas:
"Linux support for the 64-bit ARM architecture (AArch64)Features currently supported:
- 39-bit address space for user and kernel (each)
- 4KB and 64KB page configurations
- Compat (32-bit) user applications (ARMv7, EABI only)
- Flattened Device Tree (mandated for all AArch64 platforms)
- ARM generic timers"* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (35 commits)
arm64: ptrace: remove obsolete ptrace request numbers from user headers
arm64: Do not set the SMP/nAMP processor bit
arm64: MAINTAINERS update
arm64: Build infrastructure
arm64: Miscellaneous header files
arm64: Generic timers support
arm64: Loadable modules
arm64: Miscellaneous library functions
arm64: Performance counters support
arm64: Add support for /proc/sys/debug/exception-trace
arm64: Debugging support
arm64: Floating point and SIMD
arm64: 32-bit (compat) applications support
arm64: User access library functions
arm64: Signal handling support
arm64: VDSO support
arm64: System calls handling
arm64: ELF definitions
arm64: SMP support
arm64: DMA mapping API
...
17 Sep, 2012
1 commit
-
This patch adds support for the AArch64 performance counters.
Signed-off-by: Will Deacon
Signed-off-by: Catalin Marinas
Acked-by: Tony Lindgren
Acked-by: Nicolas Pitre
Acked-by: Olof Johansson
Acked-by: Santosh Shilimkar
12 Aug, 2012
1 commit
-
This patch enables perf to use the DWARF unwind code.
It extends the perf record '-g' option with following arguments:
'fp' - provides framepointer based user
stack backtrace
'dwarf[,size]' - provides DWARF (libunwind) based user stack
backtrace. The size specifies the size of the
user stack dump. If omitted it is 8192 by default.If libunwind is found during the perf build, then the 'dwarf' argument
becomes available for record command. The 'fp' stays as default option
in any case.Examples: (perf compiled with libunwind)
perf record -g dwarf ls
- provides dwarf unwind with 8192 as stack dump sizeperf record -g dwarf,4096 ls
- provides dwarf unwind with 4096 as stack dump sizeperf record -g -- ls
perf record -g fp ls
- provides frame pointer unwindSigned-off-by: Jiri Olsa
Original-patch-by: Frederic Weisbecker
Cc: "Frank Ch. Eigler"
Cc: Arun Sharma
Cc: Benjamin Redelings
Cc: Corey Ashford
Cc: Cyrill Gorcunov
Cc: Frank Ch. Eigler
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Masami Hiramatsu
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Robert Richter
Cc: Stephane Eranian
Cc: Tom Zanussi
Cc: Ulrich Drepper
Link: http://lkml.kernel.org/r/1344345647-11536-13-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo
26 May, 2012
1 commit
-
The attr.branch_sample_type field is defined as u64 by the API. As
such, we need to ensure the variable holding the value of the branch
stack filters is also u64 otherwise we may lose bits in the future.Note also that the bogus definition of the field in perf_record_opts
caused problems on big-endian PPC systems. Thanks to Anshuman Khandual
for tracking the problem on PPC.Reported-by: Anshuman Khandual
Signed-off-by: Stephane Eranian
Cc: Anshuman Khandual
Cc: Ingo Molnar
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20120525211344.GA7729@quad
Signed-off-by: Arnaldo Carvalho de Melo
03 May, 2012
2 commits
-
For further work on perf_target, it'd be better off splitting the code
into a separate file.Signed-off-by: Namhyung Kim
Reviewed-by: David Ahern
Cc: David Ahern
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1335417327-11796-9-git-send-email-namhyung.kim@lge.com
[ committer note: Fixed perl build by using stdbool and types.h in target.h ]
Signed-off-by: Arnaldo Carvalho de Melo -
The perf_target struct will be used for taking care of cpu/thread maps
based on user's input. Since it is used on various subcommands it'd
better factoring it out.Thanks to Arnaldo for suggesting the better name.
Signed-off-by: Namhyung Kim
Reviewed-by: David Ahern
Cc: David Ahern
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Paul Mackerras
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1335417327-11796-2-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo
21 Mar, 2012
1 commit
-
Pull perf events changes for v3.4 from Ingo Molnar:
- New "hardware based branch profiling" feature both on the kernel and
the tooling side, on CPUs that support it. (modern x86 Intel CPUs
with the 'LBR' hardware feature currently.)This new feature is basically a sophisticated 'magnifying glass' for
branch execution - something that is pretty difficult to extract from
regular, function histogram centric profiles.The simplest mode is activated via 'perf record -b', and the result
looks like this in perf report:$ perf record -b any_call,u -e cycles:u branchy
$ perf report -b --sort=symbol
52.34% [.] main [.] f1
24.04% [.] f1 [.] f3
23.60% [.] f1 [.] f2
0.01% [k] _IO_new_file_xsputn [k] _IO_file_overflow
0.01% [k] _IO_vfprintf_internal [k] _IO_new_file_xsputn
0.01% [k] _IO_vfprintf_internal [k] strchrnul
0.01% [k] __printf [k] _IO_vfprintf_internal
0.01% [k] main [k] __printfThis output shows from/to branch columns and shows the highest
percentage (from,to) jump combinations - i.e. the most likely taken
branches in the system. "branches" can also include function calls
and any other synchronous and asynchronous transitions of the
instruction pointer that are not 'next instruction' - such as system
calls, traps, interrupts, etc.This feature comes with (hopefully intuitive) flat ascii and TUI
support in perf report.- Various 'perf annotate' visual improvements for us assembly junkies.
It will now recognize function calls in the TUI and by hitting enter
you can follow the call (recursively) and back, amongst other
improvements.- Multiple threads/processes recording support in perf record, perf
stat, perf top - which is activated via a comma-list of PIDs:perf top -p 21483,21485
perf stat -p 21483,21485 -ddd
perf record -p 21483,21485- Support for per UID views, via the --uid paramter to perf top, perf
report, etc. For example 'perf top --uid mingo' will only show the
tasks that I am running, excluding other users, root, etc.- Jump label restructurings and improvements - this includes the
factoring out of the (hopefully much clearer) include/linux/static_key.h
generic facility:struct static_key key = STATIC_KEY_INIT_FALSE;
...
if (static_key_false(&key))
do unlikely code
else
do likely code...
static_key_slow_inc();
...
static_key_slow_inc();
...The static_key_false() branch will be generated into the code with as
little impact to the likely code path as possible. the
static_key_slow_*() APIs flip the branch via live kernel code patching.This facility can now be used more widely within the kernel to
micro-optimize hot branches whose likelihood matches the static-key
usage and fast/slow cost patterns.- SW function tracer improvements: perf support and filtering support.
- Various hardenings of the perf.data ABI, to make older perf.data's
smoother on newer tool versions, to make new features integrate more
smoothly, to support cross-endian recording/analyzing workflows
better, etc.- Restructuring of the kprobes code, the splitting out of 'optprobes',
and a corner case bugfix.- Allow the tracing of kernel console output (printk).
- Improvements/fixes to user-space RDPMC support, allowing user-space
self-profiling code to extract PMU counts without performing any
system calls, while playing nice with the kernel side.- 'perf bench' improvements
- ... and lots of internal restructurings, cleanups and fixes that made
these features possible. And, as usual this list is incomplete as
there were also lots of other improvements* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (120 commits)
perf report: Fix annotate double quit issue in branch view mode
perf report: Remove duplicate annotate choice in branch view mode
perf/x86: Prettify pmu config literals
perf report: Enable TUI in branch view mode
perf report: Auto-detect branch stack sampling mode
perf record: Add HEADER_BRANCH_STACK tag
perf record: Provide default branch stack sampling mode option
perf tools: Make perf able to read files from older ABIs
perf tools: Fix ABI compatibility bug in print_event_desc()
perf tools: Enable reading of perf.data files from different ABI rev
perf: Add ABI reference sizes
perf report: Add support for taken branch sampling
perf record: Add support for sampling taken branch
perf tools: Add code to support PERF_SAMPLE_BRANCH_STACK
x86/kprobes: Split out optprobe related code to kprobes-opt.c
x86/kprobes: Fix a bug which can modify kernel code permanently
x86/kprobes: Fix instruction recovery on optimized path
perf: Add callback to flush branch_stack on context switch
perf: Disable PERF_SAMPLE_BRANCH_* when not supported
perf/x86: Add LBR software filter support for Intel CPUs
...
14 Mar, 2012
1 commit
-
On ancient systems I get this build failure:
util/../../../arch/x86/include/asm/unistd.h:67:29: error: asm/unistd_64.h: No such file or directory
In file included from util/cache.h:7,
from builtin-test.c:8:
util/../perf.h: In function ‘sys_perf_event_open’:In file included from util/../perf.h:16
perf.h:170: error: ‘__NR_perf_event_open’ undeclared (first use in this function)The reason is that this old system does not have the split
unistd.h headers yet, from which to pick up the syscall
definitions.Add the syscall numbers to the already existing i386 and x86_64
blocks in perf.h, and also provide empty include file stubs.With this patch perf builds and works fine on 5 years old
user-space as well.Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Link: http://lkml.kernel.org/n/tip-jctwg64le1w47tuaoeyftsg9@git.kernel.org
Signed-off-by: Ingo Molnar
Signed-off-by: Arnaldo Carvalho de Melo
09 Mar, 2012
2 commits
-
This patch adds a new option to enable taken branch stack
sampling, i.e., leverage the PERF_SAMPLE_BRANCH_STACK feature
of perf_events.There is a new option to active this mode: -b.
It is possible to pass a set of filters to select the type of
branches to sample.The following filters are available:
- any : any type of branches
- any_call : any function call or system call
- any_ret : any function return or system call return
- any_ind : any indirect branch
- u: only when the branch target is at the user level
- k: only when the branch target is in the kernel
- hv: only when the branch target is in the hypervisorFilters can be combined by passing a comma separated list
to the option:$ perf record -b any_call,u -e cycles:u branchy
Signed-off-by: Roberto Agostino Vitillo
Signed-off-by: Stephane Eranian
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-13-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar -
This patch adds:
- ability to parse samples with PERF_SAMPLE_BRANCH_STACK
- sort on branches (dso_from, symbol_from, dso_to, symbol_to, mispredict)
- build histograms on branchesSigned-off-by: Roberto Agostino Vitillo
Signed-off-by: Stephane Eranian
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-12-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar
03 Mar, 2012
1 commit
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Just fall back to resetting those fields, if set, warning the user that
that feature is not available.If guest samples appear they will just be discarded because no struct
machine will be found and thus the event will be accounted as not
handled and dropped, see 0c09571.Reported-by: Namhyung Kim
Tested-by: Joerg Roedel
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Joerg Roedel
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-vuwxig36mzprl5n7nzvnxxsh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
15 Feb, 2012
2 commits
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Instead of requiring that users of perf_record_opts set
.sample_id_all_avail to true, just invert the logic, using
.sample_id_all_missing, that doesn't need to be explicitely initialized
since gcc will zero members ommitted in a struct initialization.Just like the newly introduced .exclude_{guest,host} feature test.
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-ab772uzk78cwybihf0vt7kxw@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Just fall back to resetting those fields, if set, warning the user that
that feature is not available.If guest samples appear they will just be discarded because no struct
machine will be found and thus the event will be accounted as not
handled and dropped, see 0c09571.Reported-by: Namhyung Kim
Tested-by: Joerg Roedel
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Joerg Roedel
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-vuwxig36mzprl5n7nzvnxxsh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
14 Feb, 2012
2 commits
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The perf_event_attr size needs to be initialized in all cases because it
captures the ABI version.This patch moves the initialization of the field from the
perf_event_open() syscall stub to its proper location in the
event_attr_init().Cc: Ingo Molnar
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20120209151238.GA10272@quad
Signed-off-by: Stephane Eranian
Signed-off-by: Arnaldo Carvalho de Melo -
Allow a user to collect events for multiple threads or processes
using a comma separated list.e.g., collect data on a VM and its vhost thread:
perf top -p 21483,21485
perf stat -p 21483,21485 -ddd
perf record -p 21483,21485or monitoring vcpu threads
perf top -t 21488,21489
perf stat -t 21488,21489 -ddd
perf record -t 21488,21489Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/1328718772-16688-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern
Signed-off-by: Arnaldo Carvalho de Melo
25 Jan, 2012
1 commit
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The new --uid command line option will show only the tasks for a given
user, using the proc interface to figure out the existing tasks.Kernel work is needed to close races at startup, but this should already
be useful in many use cases.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-bdnspm000gw2l984a2t53o8z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
20 Dec, 2011
1 commit
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The problem is that when SAMPLE_PERIOD is not set, the kernel generates
a number of samples in proportion to an event's period. Number of these
samples may be too big and the kernel throttles all samples above a
defined limit.E.g.: I want to trace when a process sleeps. I created a process which
sleeps for 1ms and for 4ms. perf got 100 events in both cases.swapper 0 [000] 1141.371830: sched_stat_sleep: comm=foo pid=1801 delay=1386750 [ns]
swapper 0 [000] 1141.369444: sched_stat_sleep: comm=foo pid=1801 delay=4499585 [ns]In the first case a kernel want to send 4499585 events and in the second
case it wants to send 1386750 events. perf-reports shows that process
sleeps in both places equal time.Instead of this we can get only one sample with an attribute period. As
result we have less data transferring between kernel and user-space and
we avoid throttling of samples.The patch "events: Don't divide events if it has field period" added a
kernel part of this functionality.Acked-by: Arun Sharma
Cc: Arun Sharma
Cc: David Ahern
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: devel@openvz.org
Link: http://lkml.kernel.org/r/1324391565-1369947-1-git-send-email-avagin@openvz.org
Signed-off-by: Andrew Vagin
Signed-off-by: Arnaldo Carvalho de Melo
28 Nov, 2011
4 commits
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Will be used in other tools to share the command line parsing code.
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-8x0yr77r6lrd2t699s499m8n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Tools being developed will need this to allow the user to override this
value.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-zydc1yhxfm0z35fuy95bsn1l@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
So that we can easily start a workload in other tools.
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-zdsksd4aphu0nltg2lpwsw3x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Out of the code in 'perf record', so that we can share option parsing,
etc. Eventually will be used by 'perf top', but first 'trace' will use
it.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-hzjqsgnte1esk90ytq0ap98v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
13 Oct, 2011
1 commit
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To do that we needed to stop using newtForm, as we don't want libnewt to
catch the xterm resize signal.Remove some more newt calls and instead use the underlying libslang
directly. In time tools/perf will use just libslang.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-h1824yjiru5n2ivz4bseizwj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo