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Bye-bye Performance Counters, welcome Performance Events!
In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.
Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.
All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)
The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.
Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.
User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)
This patch has been generated via the following script:
FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')
sed -i \
-e 's/PERF_EVENT_/PERF_RECORD_/g' \
-e 's/PERF_COUNTER/PERF_EVENT/g' \
-e 's/perf_counter/perf_event/g' \
-e 's/nb_counters/nb_events/g' \
-e 's/swcounter/swevent/g' \
-e 's/tpcounter_event/tp_event/g' \
$FILES
for N in $(find . -name perf_counter.[ch]); do
M=$(echo $N | sed 's/perf_counter/perf_event/g')
mv $N $M
done
FILES=$(find . -name perf_event.*)
sed -i \
-e 's/COUNTER_MASK/REG_MASK/g' \
-e 's/COUNTER/EVENT/g' \
-e 's/\<event\>/event_id/g' \
-e 's/counter/event/g' \
-e 's/Counter/Event/g' \
$FILES
... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.
Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.
( NOTE: 'counters' are still the proper terminology when we deal
with hardware registers - and these sed scripts are a bit
over-eager in renaming them. I've undone some of that, but
in case there's something left where 'counter' would be
better than 'event' we can undo that on an individual basis
instead of touching an otherwise nicely automated patch. )
Suggested-by: Stephane Eranian <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Acked-by: Paul Mackerras <[email protected]>
Reviewed-by: Arjan van de Ven <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: David Howells <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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The trace event name<->id mapping is dynamic for each kernel
compile. In order for perf.data to be useable outside the actual
system, we thus need to store a table of this mapping for later
use.
This patch adds this table to perf.data, and provides helper
functions for lookup up fields from this table.
To avoid mistakes, lookup-from-table is kept completely seprate
from lookup-from-local-debugfs.
Signed-off-by: Arjan van de Ven <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Sample timestamp and cpu just like the -R option.
Before:
init-0 [-01] 1266874889.17179869184709551615: irq_handler_entry: irq=18 handler=eth0
init-0 [-01] 1266874889.17179869184709551615: irq_handler_entry: irq=18 handler=eth0
init-0 [-01] 1266874889.17179869184709551615: irq_handler_entry: irq=1 handler=i8042
init-0 [-01] 1266874889.17179869184709551615: irq_handler_entry: irq=18 handler=eth0
init-0 [-01] 1266874889.17179869184709551615: irq_handler_entry: irq=1 handler=i8042
After:
init-0 [001] 7364.568965353: irq_handler_entry: irq=18 handler=eth0
init-0 [001] 7365.530226877: irq_handler_entry: irq=1 handler=i8042
init-0 [001] 7365.542831563: irq_handler_entry: irq=18 handler=eth0
init-0 [001] 7365.644156299: irq_handler_entry: irq=18 handler=eth0
init-0 [001] 7365.694556201: irq_handler_entry: irq=18 handler=eth0
Signed-off-by: Li Zefan <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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The name length of some trace events is longer than 30, like
sys_enter_sched_get_priority_max and
ext4_mb_discard_preallocations.
Passing those events to perf-record will fail, try:
# ./perf record -f -e syscalls:sys_enter_sched_get_priority_max -F 1 -a
Signed-off-by: Li Zefan <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Implement the 'perf sched record' subcommand that adds a
default list of events, turns on raw sampling and system-wide
tracing and passes off the rest of the command to perf record.
This is more convenient than having to specify the events all
the time.
Before:
$ perf record -a -R -e sched:sched_switch:r -e sched:sched_stat_wait:r -e sched:sched_stat_sleep:r -e sched:sched_stat_iowait:r -e sched:sched_process_exit:r -e sched:sched_process_fork:r -e sched:sched_wakeup:r -e sched:sched_migrate_task:r -c 1 sleep 1
After:
$ perf sched record -f sleep 1
Also fix an assumption in the event string parser that assumed
that strings passed in can be modified. (In this case they wont
be as they come from a readonly constant section.)
Signed-off-by: Ingo Molnar <[email protected]>
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Currently, when one wants to activate every tracepoint
counters of a subsystem from perf record, the current sequence
is needed:
perf record -e subsys:ev1 -e subsys:ev2 -e subsys:ev3
This may annoy the most patient of us.
Now we can just do:
perf record -e subsys:*
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (105 commits)
ring-buffer: only enable ring_buffer_swap_cpu when needed
ring-buffer: check for swapped buffers in start of committing
tracing: report error in trace if we fail to swap latency buffer
tracing: add trace_array_printk for internal tracers to use
tracing: pass around ring buffer instead of tracer
tracing: make tracing_reset safe for external use
tracing: use timestamp to determine start of latency traces
tracing: Remove mentioning of legacy latency_trace file from documentation
tracing/filters: Defer pred allocation, fix memory leak
tracing: remove users of tracing_reset
tracing: disable buffers and synchronize_sched before resetting
tracing: disable update max tracer while reading trace
tracing: print out start and stop in latency traces
ring-buffer: disable all cpu buffers when one finds a problem
ring-buffer: do not count discarded events
ring-buffer: remove ring_buffer_event_discard
ring-buffer: fix ring_buffer_read crossing pages
ring-buffer: remove unnecessary cpu_relax
ring-buffer: do not swap buffers during a commit
ring-buffer: do not reset while in a commit
...
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Merge reason: move from -rc5 to -rc9.
Signed-off-by: Ingo Molnar <[email protected]>
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This patch improves some (common) inefficiencies in the
handling of directory lookups:
- not using the d_type information returned by the kernel
- constructing (absolute) paths for file operation even though
directory-relative operations using the *at functions is
possible
There are more places to fix but this is a start.
Signed-off-by: Ulrich Drepper <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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While opening a trace event counter, every events are saved in
the trace.info file. But we only want to save the
specifications of the events we are using.
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Steven Rostedt <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Related to a shadowed variable bug fix Valdis Kletnieks noticed
that perf does not get built with -Wshadow, which could have
helped us avoid the bug.
So enable -Wshadow and also enable the following warnings on
perf builds, in addition to the already enabled -Wall -Wextra
-std=gnu99 warnings:
-Wcast-align
-Wformat=2
-Wshadow
-Winit-self
-Wpacked
-Wredundant-decls
-Wstack-protector
-Wstrict-aliasing=3
-Wswitch-default
-Wswitch-enum
-Wno-system-headers
-Wundef
-Wvolatile-register-var
-Wwrite-strings
-Wbad-function-cast
-Wmissing-declarations
-Wmissing-prototypes
-Wnested-externs
-Wold-style-definition
-Wstrict-prototypes
-Wdeclaration-after-statement
And change/fix the perf code to build cleanly under GCC 4.3.2.
The list of warnings enablement is rather arbitrary: it's based
on my (quick) reading of the GCC manpages and trying them on
perf.
I categorized the warnings based on individually enabling them
and looking whether they trigger something in the perf build.
If i liked those warnings (i.e. if they trigger for something
that arguably could be improved) i enabled the warning.
If the warnings seemed to come from language laywers spamming
the build with tons of nuisance warnings i generally kept them
off. Most of the sign conversion related warnings were in
this category. (A second patch enabling some of the sign
warnings might be welcome - sign bugs can be nasty.)
I also kept warnings that seem to make sense from their manpage
description and which produced no actual warnings on our code
base. These warnings might still be turned off if they end up
being a nuisance.
I also left out a few warnings that are not supported in older
compilers.
[ Note that these changes might break the build on older
compilers i did not test, or on non-x86 architectures that
produce different warnings, so more testing would be welcome. ]
Reported-by: [email protected]
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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Add a new flag field while opening a tracepoint perf counter:
-e tracepoint_subsystem:tracepoint_name:flags
This is intended to be generic although for now it only supports the
r[e[c[o[r[d]]]]] flag:
./perf record -e workqueue:workqueue_insertion:record
./perf record -e workqueue:workqueue_insertion:r
will have the same effect: enabling the raw samples record for
the given tracepoint counter.
In the future, we may want to support further flags, separated
by commas.
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Mike Galbraith <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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The new syscall tracepoints names can be too long for the 'perf list'
output.
Add a few more characters.
Signed-off-by: Jason Baron <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Jiaying Zhang <[email protected]>
Cc: Martin Bligh <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
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Stop perf list from displaying tracepoints without an id file,
those are special tracepoints that are not interfaced to
perfcounters so listing them is erroneous and passing them as
events will produce no output.
Signed-off-by: Peter Zijlstra <[email protected]>
Acked-by: Jason Baron <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Chris Mason <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Brice Goglin reported:
> I can easily sort them by thread id, but I don't know how to match
> my 4 events with each group of 4 lines.
Also report the counter id and the time running/enabled
stats (in case the counter got time-shared).
Reported-by: Brice Goglin <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Tested-by: Brice Goglin <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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If "/sys/kernel/debug" is not a debugfs mount point, search for the debugfs
filesystem in /proc/mounts, but also allows the user to specify
'--debugfs-dir=blah' or set the environment variable: 'PERF_DEBUGFS_DIR'
Signed-off-by: Jason Baron <[email protected]>
[ also made it probe "/debug" by default ]
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
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Add support to 'perf list' and 'perf stat' for kernel tracepoints. The
implementation creates a 'for_each_subsystem' and 'for_each_event' for
easy iteration over the tracepoints.
Signed-off-by: Jason Baron <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <426129bf9fcc8ee63bb094cf736e7316a7dcd77a.1248190728.git.jbaron@redhat.com>
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Keep index within event_type_descriptors[]
Signed-off-by: Roel Kluin <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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The cache events contain '$' which will hit shell variable
expansion. To avoid confusion change this to 'cache', ie
L1-d$-loads becomes L1-dcache-loads.
Signed-off-by: Anton Blanchard <[email protected]>
Cc: Roland Dreier <[email protected]>
Cc: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <20090706120131.GB4391@kryten>
Signed-off-by: Ingo Molnar <[email protected]>
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After:
$ ./perf list
List of pre-defined events (to be used in -e):
cpu-cycles OR cycles [Hardware event]
instructions [Hardware event]
cache-references [Hardware event]
cache-misses [Hardware event]
branch-instructions OR branches [Hardware event]
branch-misses [Hardware event]
bus-cycles [Hardware event]
cpu-clock [Software event]
task-clock [Software event]
page-faults OR faults [Software event]
minor-faults [Software event]
major-faults [Software event]
context-switches OR cs [Software event]
cpu-migrations OR migrations [Software event]
L1-d$-loads [Hardware cache event]
L1-d$-load-misses [Hardware cache event]
L1-d$-stores [Hardware cache event]
L1-d$-store-misses [Hardware cache event]
L1-d$-prefetches [Hardware cache event]
L1-d$-prefetch-misses [Hardware cache event]
L1-i$-loads [Hardware cache event]
L1-i$-load-misses [Hardware cache event]
L1-i$-prefetches [Hardware cache event]
L1-i$-prefetch-misses [Hardware cache event]
LLC-loads [Hardware cache event]
LLC-load-misses [Hardware cache event]
LLC-stores [Hardware cache event]
LLC-store-misses [Hardware cache event]
LLC-prefetches [Hardware cache event]
LLC-prefetch-misses [Hardware cache event]
dTLB-loads [Hardware cache event]
dTLB-load-misses [Hardware cache event]
dTLB-stores [Hardware cache event]
dTLB-store-misses [Hardware cache event]
dTLB-prefetches [Hardware cache event]
dTLB-prefetch-misses [Hardware cache event]
iTLB-loads [Hardware cache event]
iTLB-load-misses [Hardware cache event]
branch-loads [Hardware cache event]
branch-load-misses [Hardware cache event]
rNNN [raw hardware event descriptor]
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Enable -Wextra. This found a few real bugs plus a number
of signed/unsigned type mismatches/uncleanlinesses. It
also required a few annotations
All things considered it was still worth it so lets try with
this enabled for now.
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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This reworks the parser for event descriptors to make it more
consistent in what it accepts. It is now structured as a
recursive descent parser for the following grammar:
events ::= event ( ("," | space) space* event )*
event ::= ( raw_event | numeric_event | symbolic_event |
generic_hw_event ) [ event_modifier ]
raw_event ::= "r" hex_number
numeric_event ::= number ":" number
number ::= decimal_number | "0x" hex_number | "0" octal_number
symbolic_event ::= string_from_event_symbols_array
generic_hw_event::= cache_type ( "-" ( cache_op | cache_result ) )*
event_modifier ::= ":" ( "u" | "k" | "h" )+
with the extra restriction that you can have at most one
cache_op and at most one cache_result.
We pass the current string pointer by reference (i.e. as a
const char **) to the various parsing functions so that they
can advance the pointer to indicate how much they consumed.
They return 0 if they didn't recognize the thing at the pointer
or 1 if they did (and advance the pointer past it).
This also fixes parse_aliases to take the longest matching
alias from the table, not the first one. Otherwise "l1-data"
would match the "l1-d" alias and the "ata" would not be
consumed.
This allows event modifiers indicating what processor modes to
count in to be applied to any event, not just numeric events,
and adds a ":h" modifier to indicate counting in hypervisor
mode. Specifying ":u" now sets both exclude_kernel and
exclude_hv, and so on. Multiple modes can be specified, e.g.
":uk" will count in user or hypervisor mode (i.e. only
exclude_kernel will be set).
Signed-off-by: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Add 'l1d' and 'l1i' aliases again as shortcuts - just dont make them
the primary display alias.
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Added new alias for events.
On AMD box:
$ ./perf stat -e l1d -e l1d-misses -e l1d-write -e l1d-prefetch -e l1d-prefetch-miss -e l1i -e l1i-misses -e l1i-prefetch -e l2 -e l2-misses -e l2-write -e dtlb -e dtlb-misses -e itlb -e itlb-misses -e bpu -e bpu-misses -- ls -lR /usr/include/ > /dev/null
Before :
Performance counter stats for 'ls -lR /usr/include/':
248064467 L1-data-Cache-Load-Referencees (scaled from 23.27%)
1001433 L1-data-Cache-Load-Misses (scaled from 23.34%)
153691 L1-data-Cache-Store-Referencees (scaled from 23.34%)
423248 L1-data-Cache-Prefetch-Referencees (scaled from 23.33%)
302138 L1-data-Cache-Prefetch-Misses (scaled from 23.25%)
251217546 L1-instruction-Cache-Load-Referencees (scaled from 23.25%)
5757005 L1-instruction-Cache-Load-Misses (scaled from 23.23%)
93435 L1-instruction-Cache-Prefetch-Referencees (scaled from 23.24%)
6496073 L2-Cache-Load-Referencees (scaled from 23.32%)
609485 L2-Cache-Load-Misses (scaled from 23.45%)
6876991 L2-Cache-Store-Referencees (scaled from 23.71%)
248922840 Data-TLB-Cache-Load-Referencees (scaled from 23.94%)
5828386 Data-TLB-Cache-Load-Misses (scaled from 24.17%)
257613506 Instruction-TLB-Cache-Load-Referencees (scaled from 24.20%)
6833 Instruction-TLB-Cache-Load-Misses (scaled from 23.88%)
109043606 Branch-Cache-Load-Referencees (scaled from 23.64%)
5552296 Branch-Cache-Load-Misses (scaled from 23.42%)
0.413702461 seconds time elapsed.
After :
Peformance counter stats for 'ls -lR /usr/include/':
266590464 L1-d$-loads (scaled from 23.03%)
1222273 L1-d$-load-misses (scaled from 23.58%)
146204 L1-d$-stores (scaled from 23.83%)
406344 L1-d$-prefetches (scaled from 24.09%)
283748 L1-d$-prefetch-misses (scaled from 24.10%)
249650965 L1-i$-loads (scaled from 23.80%)
3353961 L1-i$-load-misses (scaled from 23.82%)
104599 L1-i$-prefetches (scaled from 23.68%)
4836405 LLC-loads (scaled from 23.67%)
498214 LLC-load-misses (scaled from 23.66%)
4953994 LLC-stores (scaled from 23.64%)
243354097 dTLB-loads (scaled from 23.77%)
6468584 dTLB-load-misses (scaled from 23.74%)
249719549 iTLB-loads (scaled from 23.25%)
5060 iTLB-load-misses (scaled from 23.00%)
112343016 branch-loads (scaled from 22.76%)
5528876 branch-load-misses (scaled from 22.54%)
0.427154051 seconds time elapsed.
Reported-by : Ingo Molnar <[email protected]>
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Made new table for cache operartion stat 'hw_cache_stat' as:
L1I : Read and prefetch only
ITLB and BPU : Read-only
introduce is_cache_op_valid() for cache operation validity
And checks for valid cache operations.
Reported-by : Ingo Molnar <[email protected]>
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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"faults" should be alias for "page-faults"
Also fixed alignment and 80 characters issue
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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By introducing alias member in event_symbol :
1. duplicate lines are removed, like:
cpu-cycles and cycles
branch-instructions and branches
context-switches and cs
cpu-migrations and migrations
2. We can also add alias for another events.
Now ./perf list looks like :
List of pre-defined events (to be used in -e):
cpu-cycles OR cycles [Hardware event]
instructions [Hardware event]
cache-references [Hardware event]
cache-misses [Hardware event]
branch-instructions OR branches [Hardware event]
branch-misses [Hardware event]
bus-cycles [Hardware event]
cpu-clock [Software event]
task-clock [Software event]
page-faults [Software event]
faults [Software event]
minor-faults [Software event]
major-faults [Software event]
context-switches OR cs [Software event]
cpu-migrations OR migrations [Software event]
rNNN [raw hardware event descriptor]
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Define separate declarations for H/W and S/W events to:
1. Shorten name to save some space so that we can add more members
2. Fix alignment
3. Avoid declaring HARDWARE/SOFTWARE again and again.
Removed unused CR(x, y)
Signed-off-by: Jaswinder Singh Rajput <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long. This causes compiler warnings every time we
print a __u64 value with %Lx.
Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8. These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.
The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__". The other changes are:
* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
to kill two remaining warnings.
Signed-off-by: Paul Mackerras <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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- use IPC for the instruction normalization output
- CPUs for the CPU utilization factor value.
- print out time elapsed like the other rows
- tidy up the task-clocks/cpu-clocks printout
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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Otherwise all L1-instruction aliases will be recognized as
L1-data by strcasestr() when calling function parse_aliases.
Signed-off-by: Yong Wang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Paul Mackerras <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Pure renames only, to PERF_COUNT_HW_* and PERF_COUNT_SW_*.
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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gcc warned about this bug:
util/parse-events.c: In function ‘parse_generic_hw_symbols’:
util/parse-events.c:175: warning: comparison is always false due to limited range of data type
util/parse-events.c:182: warning: comparison is always false due to limited range of data type
util/parse-events.c:190: warning: comparison is always false due to limited range of data type
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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Several people have suggested that 'perf' has become a full-fledged
tool that should be moved out of Documentation/. Move it to the
(new) tools/ directory.
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
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