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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COLOPHON |
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PERF-INJECT(1) perf Manual PERF-INJECT(1)
perf-inject - Filter to augment the events stream with additional
information
perf inject <options>
perf-inject reads a perf-record event stream and repipes it to
stdout. At any point the processing code can inject other events
into the event stream - in this case build-ids (-b option) are
read and injected as needed into the event stream.
Build-ids are just the first user of perf-inject - potentially
anything that needs userspace processing to augment the events
stream with additional information could make use of this
facility.
-b, --build-ids
Inject build-ids into the output stream
--buildid-all: Inject build-ids of all DSOs into the output
stream
-v, --verbose
Be more verbose.
-i, --input=
Input file name. (default: stdin)
-o, --output=
Output file name. (default: stdout)
-s, --sched-stat
Merge sched_stat and sched_switch for getting events where
and how long tasks slept. sched_switch contains a callchain
where a task slept and sched_stat contains a timeslice how
long a task slept.
--kallsyms=<file>
kallsyms pathname
--itrace
Decode Instruction Tracing data, replacing it with
synthesized events. Options are:
i synthesize instructions events
b synthesize branches events (branch misses for Arm SPE)
c synthesize branches events (calls only)
r synthesize branches events (returns only)
x synthesize transactions events
w synthesize ptwrite events
p synthesize power events
o synthesize other events recorded due to the use
of aux-output (refer to perf record)
e synthesize error events
d create a debug log
f synthesize first level cache events
m synthesize last level cache events
t synthesize TLB events
a synthesize remote access events
g synthesize a call chain (use with i or x)
G synthesize a call chain on existing event records
l synthesize last branch entries (use with i or x)
L synthesize last branch entries on existing event records
s skip initial number of events
q quicker (less detailed) decoding
The default is all events i.e. the same as --itrace=ibxwpe,
except for perf script where it is --itrace=ce
In addition, the period (default 100000, except for perf script where it is 1)
for instructions events can be specified in units of:
i instructions
t ticks
ms milliseconds
us microseconds
ns nanoseconds (default)
Also the call chain size (default 16, max. 1024) for instructions or
transactions events can be specified.
Also the number of last branch entries (default 64, max. 1024) for
instructions or transactions events can be specified.
Similar to options g and l, size may also be specified for options G and L.
On x86, note that G and L work poorly when data has been recorded with
large PEBS. Refer linkperf:perf-intel-pt[1] man page for details.
It is also possible to skip events generated (instructions, branches, transactions,
ptwrite, power) at the beginning. This is useful to ignore initialization code.
--itrace=i0nss1000000
skips the first million instructions.
The 'e' option may be followed by flags which affect what errors will or
will not be reported. Each flag must be preceded by either '+' or '-'.
The flags are:
o overflow
l trace data lost
If supported, the 'd' option may be followed by flags which affect what
debug messages will or will not be logged. Each flag must be preceded
by either '+' or '-'. The flags are:
a all perf events
If supported, the 'q' option may be repeated to increase the effect.
--strip
Use with --itrace to strip out non-synthesized events.
-j, --jit
Process jitdump files by injecting the mmap records
corresponding to jitted functions. This option also generates
the ELF images for each jitted function found in the jitdumps
files captured in the input perf.data file. Use this option
if you are monitoring environment using JIT runtimes, such as
Java, DART or V8.
-f, --force
Don’t complain, do it.
perf-record(1), perf-report(1), perf-archive(1), perf-intel-pt(1)
This page is part of the perf (Performance analysis tools for
Linux (in Linux source tree)) project. Information about the
project can be found at
⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩. If you have a
bug report for this manual page, send it to
linux-kernel@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩
on 2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-17.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
perf 2020-10-13 PERF-INJECT(1)
Pages that refer to this page: perf-intel-pt(1)
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