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9b2d2066dd
linux/tools/perf
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Adrian Hunter 9b2d2066dd perf intel-pt: Refine kernel decoding only warning message 
Stop the message displaying when user space is not being traced.

Example:

  Prerequisites:

    sudo setcap "cap_sys_rawio,cap_sys_admin,cap_sys_ptrace,cap_syslog,cap_ipc_lock=ep" ~/bin/perf
    sudo chmod +r /proc/kcore

  Before:

    $ perf record --no-switch-events --kcore -a -e intel_pt//k -- sleep 0.001
    Warning:
    Intel Processor Trace decoding will not be possible except for kernel tracing!
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.838 MB perf.data ]

  After:

    $ perf record --no-switch-events --kcore -a -e intel_pt//k -- sleep 0.001
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 1.068 MB perf.data ]

    $ sudo chmod go-r /proc/kcore
    $ sudo setcap -r ~/bin/perf

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: http://lore.kernel.org/lkml/20200528120859.21604-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-05-28 11:37:45 -03:00
..
arch perf intel-pt: Refine kernel decoding only warning message 2020-05-28 11:37:45 -03:00
bench perf tools: Replace zero-length array with flexible-array 2020-05-28 10:03:27 -03:00
Documentation perf record: Respect --no-switch-events 2020-05-28 11:33:36 -03:00
examples/bpf Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-01-28 16:02:33 -08:00
include/bpf perf bpf: Remove bpf/ subdir from bpf.h headers used to build bpf events 2020-02-18 10:13:28 -03:00
jvmti perf jvmti: Do not report error when missing debug information 2020-05-28 10:03:28 -03:00
pmu-events perf stat: POWER9 metrics: expand "ICT" acronym 2020-05-28 10:03:27 -03:00
python
scripts perf flamegraph: Use /bin/bash for report and record scripts 2020-05-05 16:35:32 -03:00
tests perf tests: Add test for the java demangler 2020-05-28 10:03:28 -03:00
trace perf beauty: Allow the CC used in the arch errno names script to acccept CFLAGS 2020-05-28 10:03:26 -03:00
ui perf evsel: Rename perf_evsel__group_idx() to evsel__group_idx() 2020-05-05 16:35:31 -03:00
util perf record: Respect --no-switch-events 2020-05-28 11:33:36 -03:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Build
builtin-annotate.c perf evsel: Rename perf_evsel__resort*() to evsel__resort*() 2020-05-28 10:03:24 -03:00
builtin-bench.c tools feature: Rename HAVE_EVENTFD to HAVE_EVENTFD_SUPPORT 2020-05-28 10:03:26 -03:00
builtin-buildid-cache.c perf session: Return error code for perf_session__new() function on failure 2019-09-20 15:58:11 -03:00
builtin-buildid-list.c perf session: Return error code for perf_session__new() function on failure 2019-09-20 15:58:11 -03:00
builtin-c2c.c perf c2c: Fix 'perf c2c record -e list' to show the default events used 2020-05-28 10:03:25 -03:00
builtin-config.c
builtin-data.c
builtin-diff.c perf evsel: Rename perf_evsel__is_*() to evsel__is*() 2020-05-05 16:35:31 -03:00
builtin-evlist.c perf evsel: Rename perf_evsel__fprintf() to evsel__fprintf() 2020-05-28 10:03:24 -03:00
builtin-ftrace.c perf ftrace: Detect workload failure 2020-05-28 10:03:27 -03:00
builtin-help.c
builtin-inject.c perf tools: Replace zero-length array with flexible-array 2020-05-28 10:03:27 -03:00
builtin-kallsyms.c
builtin-kmem.c perf kmem: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*() 2020-05-05 16:35:31 -03:00
builtin-kvm.c perf evsel: Rename perf_evsel__{str,int}val() and other tracepoint field metehods to to evsel__*() 2020-05-05 16:35:30 -03:00
builtin-list.c perf list: Add metrics to command line usage 2020-05-28 10:03:28 -03:00
builtin-lock.c perf lock: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*() 2020-05-05 16:35:31 -03:00
builtin-mem.c perf c2c: Fix 'perf c2c record -e list' to show the default events used 2020-05-28 10:03:25 -03:00
builtin-probe.c perf probe: Do not show the skipped events 2020-05-28 10:03:24 -03:00
builtin-record.c perf record: Respect --no-switch-events 2020-05-28 11:33:36 -03:00
builtin-report.c perf callchain: Setup callchain properly in pipe mode 2020-05-28 10:03:25 -03:00
builtin-sched.c perf sched: Rename perf_evsel__*() operating on 'struct evsel *' to evsel__*() 2020-05-05 16:35:31 -03:00
builtin-script.c perf script: Fix --call-trace for Intel PT 2020-05-28 11:31:13 -03:00
builtin-stat.c perf metricgroup: Add options to not group or merge 2020-05-28 10:03:28 -03:00
builtin-timechart.c perf tools: Replace zero-length array with flexible-array 2020-05-28 10:03:27 -03:00
builtin-top.c perf evsel: Rename *perf_evsel__get_config_term() & friends to evsel__env() 2020-05-28 10:03:24 -03:00
builtin-trace.c perf trace: Fix compilation error for make NO_LIBBPF=1 DEBUG=1 2020-05-28 10:03:26 -03:00
builtin-version.c
builtin.h
check-headers.sh perf tools: Grab a copy of libbpf's hashmap 2020-05-28 10:03:26 -03:00
command-list.txt
CREDITS
design.txt perf tools: Support CAP_PERFMON capability 2020-04-16 12:19:08 -03:00
Makefile tools: Let O= makes handle a relative path with -C option 2020-03-06 17:08:28 -03:00
Makefile.config tools feature: Rename HAVE_EVENTFD to HAVE_EVENTFD_SUPPORT 2020-05-28 10:03:26 -03:00
Makefile.perf perf tools: Do not display extra info when there is nothing to build 2020-05-28 10:03:25 -03:00
MANIFEST libperf: Move to tools/lib/perf 2020-01-06 11:46:09 -03:00
perf-archive.sh
perf-completion.sh
perf-read-vdso.c
perf-sys.h perf tools: Make usage of test_attr__* optional for perf-sys.h 2019-10-31 21:38:41 +01:00
perf-with-kcore.sh
perf.c libperf: Merge libperf_set_print() into libperf_init() 2019-09-25 09:51:49 -03:00
perf.h