forked from Minki/linux
7e92daaefa
Pull perf update from Ingo Molnar:
"Lots of changes in this cycle as well, with hundreds of commits from
over 30 contributors. Most of the activity was on the tooling side.
Higher level changes:
- New 'perf kvm' analysis tool, from Xiao Guangrong.
- New 'perf trace' system-wide tracing tool
- uprobes fixes + cleanups from Oleg Nesterov.
- Lots of patches to make perf build on Android out of box, from
Irina Tirdea
- Extend ftrace function tracing utility to be more dynamic for its
users. It allows for data passing to the callback functions, as
well as reading regs as if a breakpoint were to trigger at function
entry.
The main goal of this patch series was to allow kprobes to use
ftrace as an optimized probe point when a probe is placed on an
ftrace nop. With lots of help from Masami Hiramatsu, and going
through lots of iterations, we finally came up with a good
solution.
- Add cpumask for uncore pmu, use it in 'stat', from Yan, Zheng.
- Various tracing updates from Steve Rostedt
- Clean up and improve 'perf sched' performance by elliminating lots
of needless calls to libtraceevent.
- Event group parsing support, from Jiri Olsa
- UI/gtk refactorings and improvements from Namhyung Kim
- Add support for non-tracepoint events in perf script python, from
Feng Tang
- Add --symbols to 'script', similar to the one in 'report', from
Feng Tang.
Infrastructure enhancements and fixes:
- Convert the trace builtins to use the growing evsel/evlist
tracepoint infrastructure, removing several open coded constructs
like switch like series of strcmp to dispatch events, etc.
Basically what had already been showcased in 'perf sched'.
- Add evsel constructor for tracepoints, that uses libtraceevent just
to parse the /format events file, use it in a new 'perf test' to
make sure the libtraceevent format parsing regressions can be more
readily caught.
- Some strange errors were happening in some builds, but not on the
next, reported by several people, problem was some parser related
files, generated during the build, didn't had proper make deps, fix
from Eric Sandeen.
- Introduce struct and cache information about the environment where
a perf.data file was captured, from Namhyung Kim.
- Fix handling of unresolved samples when --symbols is used in
'report', from Feng Tang.
- Add union member access support to 'probe', from Hyeoncheol Lee.
- Fixups to die() removal, from Namhyung Kim.
- Render fixes for the TUI, from Namhyung Kim.
- Don't enable annotation in non symbolic view, from Namhyung Kim.
- Fix pipe mode in 'report', from Namhyung Kim.
- Move related stats code from stat to util/, will be used by the
'stat' kvm tool, from Xiao Guangrong.
- Remove die()/exit() calls from several tools.
- Resolve vdso callchains, from Jiri Olsa
- Don't pass const char pointers to basename, so that we can
unconditionally use libgen.h and thus avoid ifdef BIONIC lines,
from David Ahern
- Refactor hist formatting so that it can be reused with the GTK
browser, From Namhyung Kim
- Fix build for another rbtree.c change, from Adrian Hunter.
- Make 'perf diff' command work with evsel hists, from Jiri Olsa.
- Use the only field_sep var that is set up: symbol_conf.field_sep,
fix from Jiri Olsa.
- .gitignore compiled python binaries, from Namhyung Kim.
- Get rid of die() in more libtraceevent places, from Namhyung Kim.
- Rename libtraceevent 'private' struct member to 'priv' so that it
works in C++, from Steven Rostedt
- Remove lots of exit()/die() calls from tools so that the main perf
exit routine can take place, from David Ahern
- Fix x86 build on x86-64, from David Ahern.
- {int,str,rb}list fixes from Suzuki K Poulose
- perf.data header fixes from Namhyung Kim
- Allow user to indicate objdump path, needed in cross environments,
from Maciek Borzecki
- Fix hardware cache event name generation, fix from Jiri Olsa
- Add round trip test for sw, hw and cache event names, catching the
problem Jiri fixed, after Jiri's patch, the test passes
successfully.
- Clean target should do clean for lib/traceevent too, fix from David
Ahern
- Check the right variable for allocation failure, fix from Namhyung
Kim
- Set up evsel->tp_format regardless of evsel->name being set
already, fix from Namhyung Kim
- Oprofile fixes from Robert Richter.
- Remove perf_event_attr needless version inflation, from Jiri Olsa
- Introduce libtraceevent strerror like error reporting facility,
from Namhyung Kim
- Add pmu mappings to perf.data header and use event names from cmd
line, from Robert Richter
- Fix include order for bison/flex-generated C files, from Ben
Hutchings
- Build fixes and documentation corrections from David Ahern
- Assorted cleanups from Robert Richter
- Let O= makes handle relative paths, from Steven Rostedt
- perf script python fixes, from Feng Tang.
- Initial bash completion support, from Frederic Weisbecker
- Allow building without libelf, from Namhyung Kim.
- Support DWARF CFI based unwind to have callchains when %bp based
unwinding is not possible, from Jiri Olsa.
- Symbol resolution fixes, while fixing support PPC64 files with an
.opt ELF section was the end goal, several fixes for code that
handles all architectures and cleanups are included, from Cody
Schafer.
- Assorted fixes for Documentation and build in 32 bit, from Robert
Richter
- Cache the libtraceevent event_format associated to each evsel
early, so that we avoid relookups, i.e. calling pevent_find_event
repeatedly when processing tracepoint events.
[ This is to reduce the surface contact with libtraceevents and
make clear what is that the perf tools needs from that lib: so
far parsing the common and per event fields. ]
- Don't stop the build if the audit libraries are not installed, fix
from Namhyung Kim.
- Fix bfd.h/libbfd detection with recent binutils, from Markus
Trippelsdorf.
- Improve warning message when libunwind devel packages not present,
from Jiri Olsa"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (282 commits)
perf trace: Add aliases for some syscalls
perf probe: Print an enum type variable in "enum variable-name" format when showing accessible variables
perf tools: Check libaudit availability for perf-trace builtin
perf hists: Add missing period_* fields when collapsing a hist entry
perf trace: New tool
perf evsel: Export the event_format constructor
perf evsel: Introduce rawptr() method
perf tools: Use perf_evsel__newtp in the event parser
perf evsel: The tracepoint constructor should store sys:name
perf evlist: Introduce set_filter() method
perf evlist: Renane set_filters method to apply_filters
perf test: Add test to check we correctly parse and match syscall open parms
perf evsel: Handle endianity in intval method
perf evsel: Know if byte swap is needed
perf tools: Allow handling a NULL cpu_map as meaning "all cpus"
perf evsel: Improve tracepoint constructor setup
tools lib traceevent: Fix error path on pevent_parse_event
perf test: Fix build failure
trace: Move trace event enable from fs_initcall to core_initcall
tracing: Add an option for disabling markers
...
308 lines
8.6 KiB
Plaintext
308 lines
8.6 KiB
Plaintext
#
|
|
# General architecture dependent options
|
|
#
|
|
|
|
config OPROFILE
|
|
tristate "OProfile system profiling"
|
|
depends on PROFILING
|
|
depends on HAVE_OPROFILE
|
|
select RING_BUFFER
|
|
select RING_BUFFER_ALLOW_SWAP
|
|
help
|
|
OProfile is a profiling system capable of profiling the
|
|
whole system, include the kernel, kernel modules, libraries,
|
|
and applications.
|
|
|
|
If unsure, say N.
|
|
|
|
config OPROFILE_EVENT_MULTIPLEX
|
|
bool "OProfile multiplexing support (EXPERIMENTAL)"
|
|
default n
|
|
depends on OPROFILE && X86
|
|
help
|
|
The number of hardware counters is limited. The multiplexing
|
|
feature enables OProfile to gather more events than counters
|
|
are provided by the hardware. This is realized by switching
|
|
between events at an user specified time interval.
|
|
|
|
If unsure, say N.
|
|
|
|
config HAVE_OPROFILE
|
|
bool
|
|
|
|
config OPROFILE_NMI_TIMER
|
|
def_bool y
|
|
depends on PERF_EVENTS && HAVE_PERF_EVENTS_NMI
|
|
|
|
config KPROBES
|
|
bool "Kprobes"
|
|
depends on MODULES
|
|
depends on HAVE_KPROBES
|
|
select KALLSYMS
|
|
help
|
|
Kprobes allows you to trap at almost any kernel address and
|
|
execute a callback function. register_kprobe() establishes
|
|
a probepoint and specifies the callback. Kprobes is useful
|
|
for kernel debugging, non-intrusive instrumentation and testing.
|
|
If in doubt, say "N".
|
|
|
|
config JUMP_LABEL
|
|
bool "Optimize very unlikely/likely branches"
|
|
depends on HAVE_ARCH_JUMP_LABEL
|
|
help
|
|
This option enables a transparent branch optimization that
|
|
makes certain almost-always-true or almost-always-false branch
|
|
conditions even cheaper to execute within the kernel.
|
|
|
|
Certain performance-sensitive kernel code, such as trace points,
|
|
scheduler functionality, networking code and KVM have such
|
|
branches and include support for this optimization technique.
|
|
|
|
If it is detected that the compiler has support for "asm goto",
|
|
the kernel will compile such branches with just a nop
|
|
instruction. When the condition flag is toggled to true, the
|
|
nop will be converted to a jump instruction to execute the
|
|
conditional block of instructions.
|
|
|
|
This technique lowers overhead and stress on the branch prediction
|
|
of the processor and generally makes the kernel faster. The update
|
|
of the condition is slower, but those are always very rare.
|
|
|
|
( On 32-bit x86, the necessary options added to the compiler
|
|
flags may increase the size of the kernel slightly. )
|
|
|
|
config OPTPROBES
|
|
def_bool y
|
|
depends on KPROBES && HAVE_OPTPROBES
|
|
depends on !PREEMPT
|
|
|
|
config UPROBES
|
|
bool "Transparent user-space probes (EXPERIMENTAL)"
|
|
depends on UPROBE_EVENT && PERF_EVENTS
|
|
default n
|
|
help
|
|
Uprobes is the user-space counterpart to kprobes: they
|
|
enable instrumentation applications (such as 'perf probe')
|
|
to establish unintrusive probes in user-space binaries and
|
|
libraries, by executing handler functions when the probes
|
|
are hit by user-space applications.
|
|
|
|
( These probes come in the form of single-byte breakpoints,
|
|
managed by the kernel and kept transparent to the probed
|
|
application. )
|
|
|
|
If in doubt, say "N".
|
|
|
|
config HAVE_EFFICIENT_UNALIGNED_ACCESS
|
|
bool
|
|
help
|
|
Some architectures are unable to perform unaligned accesses
|
|
without the use of get_unaligned/put_unaligned. Others are
|
|
unable to perform such accesses efficiently (e.g. trap on
|
|
unaligned access and require fixing it up in the exception
|
|
handler.)
|
|
|
|
This symbol should be selected by an architecture if it can
|
|
perform unaligned accesses efficiently to allow different
|
|
code paths to be selected for these cases. Some network
|
|
drivers, for example, could opt to not fix up alignment
|
|
problems with received packets if doing so would not help
|
|
much.
|
|
|
|
See Documentation/unaligned-memory-access.txt for more
|
|
information on the topic of unaligned memory accesses.
|
|
|
|
config HAVE_SYSCALL_WRAPPERS
|
|
bool
|
|
|
|
config KRETPROBES
|
|
def_bool y
|
|
depends on KPROBES && HAVE_KRETPROBES
|
|
|
|
config USER_RETURN_NOTIFIER
|
|
bool
|
|
depends on HAVE_USER_RETURN_NOTIFIER
|
|
help
|
|
Provide a kernel-internal notification when a cpu is about to
|
|
switch to user mode.
|
|
|
|
config HAVE_IOREMAP_PROT
|
|
bool
|
|
|
|
config HAVE_KPROBES
|
|
bool
|
|
|
|
config HAVE_KRETPROBES
|
|
bool
|
|
|
|
config HAVE_OPTPROBES
|
|
bool
|
|
|
|
config HAVE_NMI_WATCHDOG
|
|
bool
|
|
#
|
|
# An arch should select this if it provides all these things:
|
|
#
|
|
# task_pt_regs() in asm/processor.h or asm/ptrace.h
|
|
# arch_has_single_step() if there is hardware single-step support
|
|
# arch_has_block_step() if there is hardware block-step support
|
|
# asm/syscall.h supplying asm-generic/syscall.h interface
|
|
# linux/regset.h user_regset interfaces
|
|
# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
|
|
# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
|
|
# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
|
|
# signal delivery calls tracehook_signal_handler()
|
|
#
|
|
config HAVE_ARCH_TRACEHOOK
|
|
bool
|
|
|
|
config HAVE_DMA_ATTRS
|
|
bool
|
|
|
|
config HAVE_DMA_CONTIGUOUS
|
|
bool
|
|
|
|
config USE_GENERIC_SMP_HELPERS
|
|
bool
|
|
|
|
config GENERIC_SMP_IDLE_THREAD
|
|
bool
|
|
|
|
# Select if arch init_task initializer is different to init/init_task.c
|
|
config ARCH_INIT_TASK
|
|
bool
|
|
|
|
# Select if arch has its private alloc_task_struct() function
|
|
config ARCH_TASK_STRUCT_ALLOCATOR
|
|
bool
|
|
|
|
# Select if arch has its private alloc_thread_info() function
|
|
config ARCH_THREAD_INFO_ALLOCATOR
|
|
bool
|
|
|
|
config HAVE_REGS_AND_STACK_ACCESS_API
|
|
bool
|
|
help
|
|
This symbol should be selected by an architecure if it supports
|
|
the API needed to access registers and stack entries from pt_regs,
|
|
declared in asm/ptrace.h
|
|
For example the kprobes-based event tracer needs this API.
|
|
|
|
config HAVE_CLK
|
|
bool
|
|
help
|
|
The <linux/clk.h> calls support software clock gating and
|
|
thus are a key power management tool on many systems.
|
|
|
|
config HAVE_DMA_API_DEBUG
|
|
bool
|
|
|
|
config HAVE_HW_BREAKPOINT
|
|
bool
|
|
depends on PERF_EVENTS
|
|
|
|
config HAVE_MIXED_BREAKPOINTS_REGS
|
|
bool
|
|
depends on HAVE_HW_BREAKPOINT
|
|
help
|
|
Depending on the arch implementation of hardware breakpoints,
|
|
some of them have separate registers for data and instruction
|
|
breakpoints addresses, others have mixed registers to store
|
|
them but define the access type in a control register.
|
|
Select this option if your arch implements breakpoints under the
|
|
latter fashion.
|
|
|
|
config HAVE_USER_RETURN_NOTIFIER
|
|
bool
|
|
|
|
config HAVE_PERF_EVENTS_NMI
|
|
bool
|
|
help
|
|
System hardware can generate an NMI using the perf event
|
|
subsystem. Also has support for calculating CPU cycle events
|
|
to determine how many clock cycles in a given period.
|
|
|
|
config HAVE_PERF_REGS
|
|
bool
|
|
help
|
|
Support selective register dumps for perf events. This includes
|
|
bit-mapping of each registers and a unique architecture id.
|
|
|
|
config HAVE_PERF_USER_STACK_DUMP
|
|
bool
|
|
help
|
|
Support user stack dumps for perf event samples. This needs
|
|
access to the user stack pointer which is not unified across
|
|
architectures.
|
|
|
|
config HAVE_ARCH_JUMP_LABEL
|
|
bool
|
|
|
|
config HAVE_ARCH_MUTEX_CPU_RELAX
|
|
bool
|
|
|
|
config HAVE_RCU_TABLE_FREE
|
|
bool
|
|
|
|
config ARCH_HAVE_NMI_SAFE_CMPXCHG
|
|
bool
|
|
|
|
config HAVE_ALIGNED_STRUCT_PAGE
|
|
bool
|
|
help
|
|
This makes sure that struct pages are double word aligned and that
|
|
e.g. the SLUB allocator can perform double word atomic operations
|
|
on a struct page for better performance. However selecting this
|
|
might increase the size of a struct page by a word.
|
|
|
|
config HAVE_CMPXCHG_LOCAL
|
|
bool
|
|
|
|
config HAVE_CMPXCHG_DOUBLE
|
|
bool
|
|
|
|
config ARCH_WANT_IPC_PARSE_VERSION
|
|
bool
|
|
|
|
config ARCH_WANT_COMPAT_IPC_PARSE_VERSION
|
|
bool
|
|
|
|
config ARCH_WANT_OLD_COMPAT_IPC
|
|
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
|
|
bool
|
|
|
|
config HAVE_ARCH_SECCOMP_FILTER
|
|
bool
|
|
help
|
|
An arch should select this symbol if it provides all of these things:
|
|
- syscall_get_arch()
|
|
- syscall_get_arguments()
|
|
- syscall_rollback()
|
|
- syscall_set_return_value()
|
|
- SIGSYS siginfo_t support
|
|
- secure_computing is called from a ptrace_event()-safe context
|
|
- secure_computing return value is checked and a return value of -1
|
|
results in the system call being skipped immediately.
|
|
|
|
config SECCOMP_FILTER
|
|
def_bool y
|
|
depends on HAVE_ARCH_SECCOMP_FILTER && SECCOMP && NET
|
|
help
|
|
Enable tasks to build secure computing environments defined
|
|
in terms of Berkeley Packet Filter programs which implement
|
|
task-defined system call filtering polices.
|
|
|
|
See Documentation/prctl/seccomp_filter.txt for details.
|
|
|
|
config HAVE_RCU_USER_QS
|
|
bool
|
|
help
|
|
Provide kernel entry/exit hooks necessary for userspace
|
|
RCU extended quiescent state. Syscalls need to be wrapped inside
|
|
rcu_user_exit()-rcu_user_enter() through the slow path using
|
|
TIF_NOHZ flag. Exceptions handlers must be wrapped as well. Irqs
|
|
are already protected inside rcu_irq_enter/rcu_irq_exit() but
|
|
preemption or signal handling on irq exit still need to be protected.
|
|
|
|
source "kernel/gcov/Kconfig"
|