linux/tools/perf
Adrian Hunter 75659c6fb5 perf scripts python: intel-pt-events.py: Print ptwrite value as a string if it is ASCII
It can be convenient to put a string value into a ptwrite payload as
a quick and easy way to identify what is being printed.

To make that useful, if the Intel ptwrite payload value contains only
printable ASCII characters padded with NULLs, then print it also as a
string.

Using the example program from the "Emulated PTWRITE" section of
tools/perf/Documentation/perf-intel-pt.txt:

 $ echo -n "Hello" | od -t x8
 0000000 0000006f6c6c6548
 0000005
 $ perf record -e intel_pt//u ./eg_ptw 0x0000006f6c6c6548
 [ perf record: Woken up 1 times to write data ]
 [ perf record: Captured and wrote 0.016 MB perf.data ]
 $ perf script --itrace=ew intel-pt-events.py
 Intel PT Branch Trace, Power Events, Event Trace and PTWRITE
      Switch In   38524/38524 [001]     24166.044995916     0/0
           eg_ptw 38524/38524 [001]     24166.045380004   ptwrite  jmp                   IP: 0 payload: 0x6f6c6c6548 Hello     56532c7ce196 perf_emulate_ptwrite+0x16 (/home/ahunter/git/work/eg_ptw)
 End

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220509152400.376613-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-05-17 11:56:15 -03:00
..
arch perf auxtrace: Record whether an auxtrace mmap is needed 2022-05-10 14:27:19 -03:00
bench perf bench breakpoint: Fix build on 32-bit arches 2022-05-16 21:23:09 -03:00
dlfilters perf dlfilter: Drop unused variable 2021-12-16 12:18:11 -03:00
Documentation perf intel-pt: Add support for emulated ptwrite 2022-05-17 11:55:49 -03:00
examples/bpf
include
jvmti
pmu-events perf vendor events intel: Update CLX events to v1.15 2022-05-04 12:52:04 -03:00
python perf python: Convert tracepoint.py example to python3 2022-04-01 16:19:35 -03:00
scripts perf scripts python: intel-pt-events.py: Print ptwrite value as a string if it is ASCII 2022-05-17 11:56:15 -03:00
tests Merge remote-tracking branch 'torvalds/master' into perf/core 2022-05-16 10:14:59 -03:00
trace perf beauty: Update copy of linux/socket.h with the kernel sources 2022-04-01 16:19:34 -03:00
ui perf annotate: Avoid TUI crash when navigating in the annotation of recursive functions 2022-01-10 15:47:30 -03:00
util perf intel-pt: Add support for emulated ptwrite 2022-05-17 11:55:49 -03:00
.gitignore perf tools: Delete perf-with-kcore.sh script 2022-04-27 20:11:26 -03:00
Build
builtin-annotate.c perf annotate: Add --percent-limit option 2022-05-10 14:37:55 -03:00
builtin-bench.c perf bench: Add breakpoint benchmarks 2022-05-13 11:00:38 -03:00
builtin-buildid-cache.c perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
builtin-buildid-list.c
builtin-c2c.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-config.c
builtin-daemon.c
builtin-data.c perf data: Don't mention --to-ctf if it's not supported 2022-02-22 21:23:08 -03:00
builtin-diff.c
builtin-evlist.c
builtin-ftrace.c perf evlist: Rename cpus to user_requested_cpus 2022-04-01 16:19:35 -03:00
builtin-help.c
builtin-inject.c perf namespaces: Add functions to access nsinfo 2022-02-11 14:31:22 -03:00
builtin-kallsyms.c
builtin-kmem.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-kvm.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-list.c
builtin-lock.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-mem.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-probe.c perf namespaces: Add functions to access nsinfo 2022-02-11 14:31:22 -03:00
builtin-record.c perf cpumap: Switch to using perf_cpu_map API 2022-05-05 14:07:27 -03:00
builtin-report.c perf report: Set PERF_SAMPLE_DATA_SRC bit for Arm SPE event 2022-04-22 18:39:34 -03:00
builtin-sched.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-script.c perf script: Print Intel ptwrite value as a string if it is ASCII 2022-05-17 11:56:02 -03:00
builtin-stat.c perf stat: Support hybrid --topdown option 2022-04-24 07:50:18 -03:00
builtin-timechart.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-top.c perf evlist: Rename cpus to user_requested_cpus 2022-04-01 16:19:35 -03:00
builtin-trace.c Merge remote-tracking branch 'torvalds/master' into perf/core 2022-02-17 18:40:54 -03:00
builtin-version.c perf version: Add HAVE_DEBUGINFOD_SUPPORT to built-in features 2022-04-20 13:32:09 -03:00
builtin.h
check-headers.sh tools arm64: Import cputype.h 2022-03-26 10:53:45 -03:00
command-list.txt
CREDITS
design.txt perf design.txt: Synchronize the definition of enum perf_hw_id with code 2021-11-13 18:11:50 -03:00
Makefile
Makefile.config perf tools: Use Python devtools for version autodetection rather than runtime 2022-05-03 11:23:44 -03:00
Makefile.perf perf tools: Delete perf-with-kcore.sh script 2022-04-27 20:11:26 -03:00
MANIFEST perf MANIFEST: Add bpftool files to allow building with BUILD_BPF_SKEL=1 2021-11-07 15:39:28 -03:00
perf-archive.sh
perf-completion.sh
perf-iostat.sh
perf-read-vdso.c
perf-sys.h
perf.c perf tools: Add external commands to list-cmds 2022-04-09 14:21:00 -03:00
perf.h