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Message-ID: <20180621151800.GU20477@kernel.org>
Date: Thu, 21 Jun 2018 12:18:00 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Kim Phillips <kim.phillips@....com>
Cc: linux-kernel@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Thomas Richter <tmricht@...ux.vnet.ibm.com>,
Michael Petlan <mpetlan@...hat.com>,
Hendrik Brückner
<brueckner@...ux.vnet.ibm.com>,
Sandipan Das <sandipan@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/2] perf test shell: make perf inet_pton test more
portable
Em Thu, Jun 21, 2018 at 11:19:15AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Jun 20, 2018 at 07:45:46PM -0500, Kim Phillips escreveu:
> > On Wed, 20 Jun 2018 10:46:22 -0300
> > Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> >
> > > Em Tue, Jun 19, 2018 at 06:49:52PM -0500, Kim Phillips escreveu:
> > > > Debian based systems such as Ubuntu have dash as their default shell.
> > > > Even if the normal or root user's shell is bash, certain scripts still
> > > > call /bin/sh, which points to dash, so we fix this perf test by
> > > > rewriting it in a more portable way.
> > >
> > > Isn't it better to just make /bin/bash a requirement for these tests?
> >
> > Perf is more bug-prone in distributions other than its main developers'
> > distributions, and when its own built-in tests start depending on those
> > same (primary) distributions' preferences, tests start to get skipped
> > on the secondary ones, which start to get subsequently ignored and
>
> That is a valid concern, I test build it on many, many distros, running
> 'perf test' in all of them was always in the backlog, I guess this is
> the time for me to try and have it running on them all, running
> privileged containers so that all the tests can run there, perhaps some
> will need to be tweaked to skip when running on a container environment,
> hopefully not.
>
> For reference, before pushing upstream all these environments are test
> built, many with all the devel libraries to exercise building with all
> the features present in the codebase, both with and without libelf, with
> gcc and when available, with clang as well:
>
> 1 alpine:3.4 : Ok gcc (Alpine 5.3.0) 5.3.0
> 2 alpine:3.5 : Ok gcc (Alpine 6.2.1) 6.2.1 20160822
> 3 alpine:3.6 : Ok gcc (Alpine 6.3.0) 6.3.0
> 4 alpine:3.7 : Ok gcc (Alpine 6.4.0) 6.4.0
> 5 alpine:edge : Ok gcc (Alpine 6.4.0) 6.4.0
> 6 amazonlinux:1 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11)
> 7 amazonlinux:2 : Ok gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
> 8 android-ndk:r12b-arm : Ok arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
> 9 android-ndk:r15c-arm : Ok arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
> 10 centos:5 : Ok gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-55)
> 11 centos:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18)
> 12 centos:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16)
> 13 debian:7 : Ok gcc (Debian 4.7.2-5) 4.7.2
> 14 debian:8 : Ok gcc (Debian 4.9.2-10+deb8u1) 4.9.2
> 15 debian:9 : Ok gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
> 16 debian:experimental : Ok gcc (Debian 7.3.0-15) 7.3.0
> 17 debian:experimental-x-arm64 : Ok aarch64-linux-gnu-gcc (Debian 7.3.0-15) 7.3.0
> 18 debian:experimental-x-mips : Ok mips-linux-gnu-gcc (Debian 7.3.0-19) 7.3.0
> 19 debian:experimental-x-mips64 : Ok mips64-linux-gnuabi64-gcc (Debian 7.3.0-18) 7.3.0
> 20 debian:experimental-x-mipsel : Ok mipsel-linux-gnu-gcc (Debian 7.3.0-20) 7.3.0
> 21 fedora:20 : Ok gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7)
> 22 fedora:21 : Ok gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6)
> 23 fedora:22 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
> 24 fedora:23 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
> 25 fedora:24 : Ok gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1)
> 26 fedora:24-x-ARC-uClibc : Ok arc-linux-gcc (ARCompact ISA Linux uClibc toolchain 2017.09-rc2) 7.1.1 20170710
> 27 fedora:25 : Ok gcc (GCC) 6.4.1 20170727 (Red Hat 6.4.1-1)
> 28 fedora:26 : Ok gcc (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2)
> 29 fedora:27 : Ok gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
> 30 fedora:28 : Ok gcc (GCC) 8.0.1 20180324 (Red Hat 8.0.1-0.20)
> 31 fedora:rawhide : Ok gcc (GCC) 8.0.1 20180324 (Red Hat 8.0.1-0.20)
> 32 gentoo-stage3-amd64:latest : Ok gcc (Gentoo 6.4.0-r1 p1.3) 6.4.0
> 33 mageia:5 : Ok gcc (GCC) 4.9.2
> 34 mageia:6 : Ok gcc (Mageia 5.5.0-1.mga6) 5.5.0
> 35 opensuse:42.1 : Ok gcc (SUSE Linux) 4.8.5
> 36 opensuse:42.2 : Ok gcc (SUSE Linux) 4.8.5
> 37 opensuse:42.3 : Ok gcc (SUSE Linux) 4.8.5
> 38 opensuse:tumbleweed : Ok gcc (SUSE Linux) 7.3.1 20180323 [gcc-7-branch revision 258812]
> 39 oraclelinux:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18.0.7)
> 40 oraclelinux:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28.0.1)
> 41 ubuntu:12.04.5 : Ok gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
> 42 ubuntu:14.04.4 : Ok gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
> 43 ubuntu:14.04.4-x-linaro-arm64 : Ok aarch64-linux-gnu-gcc (Linaro GCC 5.4-2017.05) 5.4.1 20170404
> 44 ubuntu:15.04 : Ok gcc (Ubuntu 4.9.2-10ubuntu13) 4.9.2
> 45 ubuntu:16.04 : Ok gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 46 ubuntu:16.04-x-arm : Ok arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 47 ubuntu:16.04-x-arm64 : Ok aarch64-linux-gnu-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 48 ubuntu:16.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 49 ubuntu:16.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 50 ubuntu:16.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 51 ubuntu:16.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 52 ubuntu:16.10 : Ok gcc (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005
> 53 ubuntu:17.04 : Ok gcc (Ubuntu 6.3.0-12ubuntu2) 6.3.0 20170406
> 54 ubuntu:17.10 : Ok gcc (Ubuntu 7.2.0-8ubuntu3.2) 7.2.0
> 55 ubuntu:18.04 : Ok gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0
>
> So I'll try running it on the non-cross-builds (x-something) containers,
> because so far I'm just running these on x86_64 as the host machine.
>
> > become acceptable to testers, which is a whole pattern I'd like to
> > avoid if at all possible. I'd eventually like to see the real perf run
>
> Agreed.
>
> > on Android, for example, and adding bash to Android is nontrivial,
> > AFAICT.
>
> Fair enough.
>
> > > I think the alternative is cryptic :-\
> >
> > I think that's because of the fake array stuff, which technically isn't
> > needed by design. How about something like the following?
>
> Thanks for trying to address my concern, looking...
>
> > diff --git a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> > index 263057039693..d5cceaeba42d 100755
> > --- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> > +++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
> > @@ -14,20 +14,21 @@ libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1
> > nm -Dg $libc 2>/dev/null | fgrep -q inet_pton || exit 254
> >
> > trace_libc_inet_pton_backtrace() {
> > + newline='\n'
> > idx=0
> > - expected[0]="ping[][0-9 \.:]+probe_libc:inet_pton: \([[:xdigit:]]+\)"
> > - expected[1]=".*inet_pton\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> > + expected="ping[][0-9 \.:]+probe_libc:inet_pton: \([[:xdigit:]]+\)"
> > + expected="${expected}${newline}.*inet_pton\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
Ok, seems to be the common ground, unfortunately expected+="${newline}..."
is not present in dash :-\
[root@...et ~]# a="AA "
[root@...et ~]# a+="BB "
[root@...et ~]# echo $a
AA BB
[root@...et ~]# dash
# a="AA "
# a+="BB "
dash: 2: a+=BB : not found
# let a+="BB "
dash: 3: let: not found
# a="AA "
# a="${a} BB "
# echo $a
AA BB
#
Would be good if we had some utility that given a two files, one with
regexps, could tell if, line by line, those expressions matched, better,
one that is present in all these OSes...
- Arnaldo
> > case "$(uname -m)" in
> > s390x)
> > eventattr='call-graph=dwarf,max-stack=4'
> > - expected[2]="gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> > - expected[3]="(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> > - expected[4]="main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> > + expected="${expected}${newline}gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> > + expected="${expected}${newline}(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
> > + expected="${expected}${newline}main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> > ;;
> > *)
> > eventattr='max-stack=3'
> > - expected[2]="getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
> > - expected[3]=".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> > + expected="${expected}${newline}getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
> > + expected="${expected}${newline}.*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
> > ;;
> > esac
> >
> > @@ -35,14 +36,16 @@ trace_libc_inet_pton_backtrace() {
> >
> > perf record -e probe_libc:inet_pton/$eventattr/ -o $file ping -6 -c 1 ::1 > /dev/null 2>&1
> > perf script -i $file | while read line ; do
> > + [ -z "${line}" ] && break
> > echo $line
> > - echo "$line" | egrep -q "${expected[$idx]}"
> > + idx=$((idx + 1))
> > + first="$(echo ${expected} | head -$idx | tail -1)"
> > + [ -z "${first}" ] && break
> > + echo "$line" | egrep -q "$first"
> > if [ $? -ne 0 ] ; then
> > - printf "FAIL: expected backtrace entry %d \"%s\" got \"%s\"\n" $idx "${expected[$idx]}" "$line"
> > + printf "FAIL: expected backtrace entry %d \"%s\" got \"%s\"\n" $idx "${first}" "$line"
> > exit 1
> > fi
> > - let idx+=1
> > - [ -z "${expected[$idx]}" ] && break
> > done
> >
> > # If any statements are executed from this point onwards,
> >
> > Thanks,
> >
> > Kim
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