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Date: Wed, 27 Apr 2022 20:12:05 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: Delete perf-with-kcore.sh script
Em Wed, Apr 27, 2022 at 05:19:46PM +0300, Adrian Hunter escreveu:
> It has been obsolete since the introduction of the perf record --kcore
> option.
Thanks, applied.
- Arnaldo
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
> tools/perf/.gitignore | 1 -
> tools/perf/Makefile.perf | 5 +-
> tools/perf/perf-with-kcore.sh | 247 ----------------------------------
> 3 files changed, 1 insertion(+), 252 deletions(-)
> delete mode 100644 tools/perf/perf-with-kcore.sh
>
> diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
> index 20b8ab984d5f..4b9c71faa01a 100644
> --- a/tools/perf/.gitignore
> +++ b/tools/perf/.gitignore
> @@ -19,7 +19,6 @@ perf.data
> perf.data.old
> output.svg
> perf-archive
> -perf-with-kcore
> perf-iostat
> tags
> TAGS
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index 69473a836bae..6e5aded855cc 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -286,7 +286,6 @@ PYRF_OBJS =
> SCRIPT_SH =
>
> SCRIPT_SH += perf-archive.sh
> -SCRIPT_SH += perf-with-kcore.sh
> SCRIPT_SH += perf-iostat.sh
>
> grep-libs = $(filter -l%,$(1))
> @@ -973,8 +972,6 @@ ifndef NO_LIBBPF
> endif
> $(call QUIET_INSTALL, perf-archive) \
> $(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
> - $(call QUIET_INSTALL, perf-with-kcore) \
> - $(INSTALL) $(OUTPUT)perf-with-kcore -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
> $(call QUIET_INSTALL, perf-iostat) \
> $(INSTALL) $(OUTPUT)perf-iostat -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
> ifndef NO_LIBAUDIT
> @@ -1088,7 +1085,7 @@ bpf-skel-clean:
> $(call QUIET_CLEAN, bpf-skel) $(RM) -r $(SKEL_TMP_OUT) $(SKELETONS)
>
> clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean fixdep-clean python-clean bpf-skel-clean
> - $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(OUTPUT)perf-iostat $(LANG_BINDINGS)
> + $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-iostat $(LANG_BINDINGS)
> $(Q)find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
> $(Q)$(RM) $(OUTPUT).config-detected
> $(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32 $(OUTPUT)pmu-events/jevents $(OUTPUT)$(LIBJVMTI).so
> diff --git a/tools/perf/perf-with-kcore.sh b/tools/perf/perf-with-kcore.sh
> deleted file mode 100644
> index 0b96545c8184..000000000000
> --- a/tools/perf/perf-with-kcore.sh
> +++ /dev/null
> @@ -1,247 +0,0 @@
> -#!/bin/bash
> -# SPDX-License-Identifier: GPL-2.0-only
> -# perf-with-kcore: use perf with a copy of kcore
> -# Copyright (c) 2014, Intel Corporation.
> -#
> -
> -set -e
> -
> -usage()
> -{
> - echo "Usage: perf-with-kcore <perf sub-command> <perf.data directory> [<sub-command options> [ -- <workload>]]" >&2
> - echo " <perf sub-command> can be record, script, report or inject" >&2
> - echo " or: perf-with-kcore fix_buildid_cache_permissions" >&2
> - exit 1
> -}
> -
> -find_perf()
> -{
> - if [ -n "$PERF" ] ; then
> - return
> - fi
> - PERF=`which perf || true`
> - if [ -z "$PERF" ] ; then
> - echo "Failed to find perf" >&2
> - exit 1
> - fi
> - if [ ! -x "$PERF" ] ; then
> - echo "Failed to find perf" >&2
> - exit 1
> - fi
> - echo "Using $PERF"
> - "$PERF" version
> -}
> -
> -copy_kcore()
> -{
> - echo "Copying kcore"
> -
> - if [ $EUID -eq 0 ] ; then
> - SUDO=""
> - else
> - SUDO="sudo"
> - fi
> -
> - rm -f perf.data.junk
> - ("$PERF" record -o perf.data.junk "${PERF_OPTIONS[@]}" -- sleep 60) >/dev/null 2>/dev/null &
> - PERF_PID=$!
> -
> - # Need to make sure that perf has started
> - sleep 1
> -
> - KCORE=$(($SUDO "$PERF" buildid-cache -v -f -k /proc/kcore >/dev/null) 2>&1)
> - case "$KCORE" in
> - "kcore added to build-id cache directory "*)
> - KCORE_DIR=${KCORE#"kcore added to build-id cache directory "}
> - ;;
> - *)
> - kill $PERF_PID
> - wait >/dev/null 2>/dev/null || true
> - rm perf.data.junk
> - echo "$KCORE"
> - echo "Failed to find kcore" >&2
> - exit 1
> - ;;
> - esac
> -
> - kill $PERF_PID
> - wait >/dev/null 2>/dev/null || true
> - rm perf.data.junk
> -
> - $SUDO cp -a "$KCORE_DIR" "$(pwd)/$PERF_DATA_DIR"
> - $SUDO rm -f "$KCORE_DIR/kcore"
> - $SUDO rm -f "$KCORE_DIR/kallsyms"
> - $SUDO rm -f "$KCORE_DIR/modules"
> - $SUDO rmdir "$KCORE_DIR"
> -
> - KCORE_DIR_BASENAME=$(basename "$KCORE_DIR")
> - KCORE_DIR="$(pwd)/$PERF_DATA_DIR/$KCORE_DIR_BASENAME"
> -
> - $SUDO chown $UID "$KCORE_DIR"
> - $SUDO chown $UID "$KCORE_DIR/kcore"
> - $SUDO chown $UID "$KCORE_DIR/kallsyms"
> - $SUDO chown $UID "$KCORE_DIR/modules"
> -
> - $SUDO chgrp $GROUPS "$KCORE_DIR"
> - $SUDO chgrp $GROUPS "$KCORE_DIR/kcore"
> - $SUDO chgrp $GROUPS "$KCORE_DIR/kallsyms"
> - $SUDO chgrp $GROUPS "$KCORE_DIR/modules"
> -
> - ln -s "$KCORE_DIR_BASENAME" "$PERF_DATA_DIR/kcore_dir"
> -}
> -
> -fix_buildid_cache_permissions()
> -{
> - if [ $EUID -ne 0 ] ; then
> - echo "This script must be run as root via sudo " >&2
> - exit 1
> - fi
> -
> - if [ -z "$SUDO_USER" ] ; then
> - echo "This script must be run via sudo" >&2
> - exit 1
> - fi
> -
> - USER_HOME=$(bash <<< "echo ~$SUDO_USER")
> -
> - echo "Fixing buildid cache permissions"
> -
> - find "$USER_HOME/.debug" -xdev -type d ! -user "$SUDO_USER" -ls -exec chown "$SUDO_USER" \{\} \;
> - find "$USER_HOME/.debug" -xdev -type f -links 1 ! -user "$SUDO_USER" -ls -exec chown "$SUDO_USER" \{\} \;
> - find "$USER_HOME/.debug" -xdev -type l ! -user "$SUDO_USER" -ls -exec chown -h "$SUDO_USER" \{\} \;
> -
> - if [ -n "$SUDO_GID" ] ; then
> - find "$USER_HOME/.debug" -xdev -type d ! -group "$SUDO_GID" -ls -exec chgrp "$SUDO_GID" \{\} \;
> - find "$USER_HOME/.debug" -xdev -type f -links 1 ! -group "$SUDO_GID" -ls -exec chgrp "$SUDO_GID" \{\} \;
> - find "$USER_HOME/.debug" -xdev -type l ! -group "$SUDO_GID" -ls -exec chgrp -h "$SUDO_GID" \{\} \;
> - fi
> -
> - echo "Done"
> -}
> -
> -check_buildid_cache_permissions()
> -{
> - if [ $EUID -eq 0 ] ; then
> - return
> - fi
> -
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type d ! -user "$USER" -print -quit)
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type f -links 1 ! -user "$USER" -print -quit)
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type l ! -user "$USER" -print -quit)
> -
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type d ! -group "$GROUPS" -print -quit)
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type f -links 1 ! -group "$GROUPS" -print -quit)
> - PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type l ! -group "$GROUPS" -print -quit)
> -
> - if [ -n "$PERMISSIONS_OK" ] ; then
> - echo "*** WARNING *** buildid cache permissions may need fixing" >&2
> - fi
> -}
> -
> -record()
> -{
> - echo "Recording"
> -
> - if [ $EUID -ne 0 ] ; then
> -
> - if [ "$(cat /proc/sys/kernel/kptr_restrict)" -ne 0 ] ; then
> - echo "*** WARNING *** /proc/sys/kernel/kptr_restrict prevents access to kernel addresses" >&2
> - fi
> -
> - if echo "${PERF_OPTIONS[@]}" | grep -q ' -a \|^-a \| -a$\|^-a$\| --all-cpus \|^--all-cpus \| --all-cpus$\|^--all-cpus$' ; then
> - echo "*** WARNING *** system-wide tracing without root access will not be able to read all necessary information from /proc" >&2
> - fi
> -
> - if echo "${PERF_OPTIONS[@]}" | grep -q 'intel_pt\|intel_bts\| -I\|^-I' ; then
> - if [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt -1 ] ; then
> - echo "*** WARNING *** /proc/sys/kernel/perf_event_paranoid restricts buffer size and tracepoint (sched_switch) use" >&2
> - fi
> -
> - if echo "${PERF_OPTIONS[@]}" | grep -q ' --per-thread \|^--per-thread \| --per-thread$\|^--per-thread$' ; then
> - true
> - elif echo "${PERF_OPTIONS[@]}" | grep -q ' -t \|^-t \| -t$\|^-t$' ; then
> - true
> - elif [ ! -r /sys/kernel/debug -o ! -x /sys/kernel/debug ] ; then
> - echo "*** WARNING *** /sys/kernel/debug permissions prevent tracepoint (sched_switch) use" >&2
> - fi
> - fi
> - fi
> -
> - if [ -z "$1" ] ; then
> - echo "Workload is required for recording" >&2
> - usage
> - fi
> -
> - if [ -e "$PERF_DATA_DIR" ] ; then
> - echo "'$PERF_DATA_DIR' exists" >&2
> - exit 1
> - fi
> -
> - find_perf
> -
> - mkdir "$PERF_DATA_DIR"
> -
> - echo "$PERF record -o $PERF_DATA_DIR/perf.data ${PERF_OPTIONS[@]} -- $@"
> - "$PERF" record -o "$PERF_DATA_DIR/perf.data" "${PERF_OPTIONS[@]}" -- "$@" || true
> -
> - if rmdir "$PERF_DATA_DIR" > /dev/null 2>/dev/null ; then
> - exit 1
> - fi
> -
> - copy_kcore
> -
> - echo "Done"
> -}
> -
> -subcommand()
> -{
> - find_perf
> - check_buildid_cache_permissions
> - echo "$PERF $PERF_SUB_COMMAND -i $PERF_DATA_DIR/perf.data --kallsyms=$PERF_DATA_DIR/kcore_dir/kallsyms $@"
> - "$PERF" $PERF_SUB_COMMAND -i "$PERF_DATA_DIR/perf.data" "--kallsyms=$PERF_DATA_DIR/kcore_dir/kallsyms" "$@"
> -}
> -
> -if [ "$1" = "fix_buildid_cache_permissions" ] ; then
> - fix_buildid_cache_permissions
> - exit 0
> -fi
> -
> -PERF_SUB_COMMAND=$1
> -PERF_DATA_DIR=$2
> -shift || true
> -shift || true
> -
> -if [ -z "$PERF_SUB_COMMAND" ] ; then
> - usage
> -fi
> -
> -if [ -z "$PERF_DATA_DIR" ] ; then
> - usage
> -fi
> -
> -case "$PERF_SUB_COMMAND" in
> -"record")
> - while [ "$1" != "--" ] ; do
> - PERF_OPTIONS+=("$1")
> - shift || break
> - done
> - if [ "$1" != "--" ] ; then
> - echo "Options and workload are required for recording" >&2
> - usage
> - fi
> - shift
> - record "$@"
> -;;
> -"script")
> - subcommand "$@"
> -;;
> -"report")
> - subcommand "$@"
> -;;
> -"inject")
> - subcommand "$@"
> -;;
> -*)
> - usage
> -;;
> -esac
> --
> 2.25.1
--
- Arnaldo
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