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path: root/t/t4002-diff-basic.sh
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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#

test_description='Test diff raw-output.

'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-read-tree-m-3way.sh

cat >.test-plain-OA <<\EOF
:000000 100644 0000000000000000000000000000000000000000 ccba72ad3888a3520b39efcf780b9ee64167535d A	AA
:000000 100644 0000000000000000000000000000000000000000 7e426fb079479fd67f6d81f984e4ec649a44bc25 A	AN
:100644 000000 bcc68ef997017466d5c9094bcf7692295f588c9a 0000000000000000000000000000000000000000 D	DD
:000000 040000 0000000000000000000000000000000000000000 6d50f65d3bdab91c63444294d38f08aeff328e42 A	DF
:100644 000000 141c1f1642328e4bc46a7d801a71da392e66791e 0000000000000000000000000000000000000000 D	DM
:100644 000000 35abde1506ddf806572ff4d407bd06885d0f8ee9 0000000000000000000000000000000000000000 D	DN
:000000 100644 0000000000000000000000000000000000000000 1d41122ebdd7a640f29d3c9cc4f9d70094374762 A	LL
:100644 100644 03f24c8c4700babccfd28b654e7e8eac402ad6cd 103d9f89b50b9aad03054b579be5e7aa665f2d57 M	MD
:100644 100644 b258508afb7ceb449981bd9d63d2d3e971bf8d34 b431b272d829ff3aa4d1a5085f4394ab4d3305b6 M	MM
:100644 100644 bd084b0c27c7b6cc34f11d6d0509a29be3caf970 a716d58de4a570e0038f5c307bd8db34daea021f M	MN
:100644 100644 40c959f984c8b89a2b02520d17f00d717f024397 2ac547ae9614a00d1b28275de608131f7a0e259f M	SS
:100644 100644 4ac13458899ab908ef3b1128fa378daefc88d356 4c86f9a85fbc5e6804ee2e17a797538fbe785bca M	TT
:040000 040000 7d670fdcdb9929f6c7dac196ff78689cd1c566a1 5e5f22072bb39f6e12cf663a57cb634c76eefb49 M	Z
EOF

cat >.test-recursive-OA <<\EOF
:000000 100644 0000000000000000000000000000000000000000 ccba72ad3888a3520b39efcf780b9ee64167535d A	AA
:000000 100644 0000000000000000000000000000000000000000 7e426fb079479fd67f6d81f984e4ec649a44bc25 A	AN
:100644 000000 bcc68ef997017466d5c9094bcf7692295f588c9a 0000000000000000000000000000000000000000 D	DD
:000000 100644 0000000000000000000000000000000000000000 68a6d8b91da11045cf4aa3a5ab9f2a781c701249 A	DF/DF
:100644 000000 141c1f1642328e4bc46a7d801a71da392e66791e 0000000000000000000000000000000000000000 D	DM
:100644 000000 35abde1506ddf806572ff4d407bd06885d0f8ee9 0000000000000000000000000000000000000000 D	DN
:000000 100644 0000000000000000000000000000000000000000 1d41122ebdd7a640f29d3c9cc4f9d70094374762 A	LL
:100644 100644 03f24c8c4700babccfd28b654e7e8eac402ad6cd 103d9f89b50b9aad03054b579be5e7aa665f2d57 M	MD
:100644 100644 b258508afb7ceb449981bd9d63d2d3e971bf8d34 b431b272d829ff3aa4d1a5085f4394ab4d3305b6 M	MM
:100644 100644 bd084b0c27c7b6cc34f11d6d0509a29be3caf970 a716d58de4a570e0038f5c307bd8db34daea021f M	MN
:100644 100644 40c959f984c8b89a2b02520d17f00d717f024397 2ac547ae9614a00d1b28275de608131f7a0e259f M	SS
:100644 100644 4ac13458899ab908ef3b1128fa378daefc88d356 4c86f9a85fbc5e6804ee2e17a797538fbe785bca M	TT
:000000 100644 0000000000000000000000000000000000000000 8acb8e9750e3f644bf323fcf3d338849db106c77 A	Z/AA
:000000 100644 0000000000000000000000000000000000000000 087494262084cefee7ed484d20c8dc0580791272 A	Z/AN
:100644 000000 879007efae624d2b1307214b24a956f0a8d686a8 0000000000000000000000000000000000000000 D	Z/DD
:100644 000000 9b541b2275c06e3a7b13f28badf5294e2ae63df4 0000000000000000000000000000000000000000 D	Z/DM
:100644 000000 beb5d38c55283d280685ea21a0e50cfcc0ca064a 0000000000000000000000000000000000000000 D	Z/DN
:100644 100644 d41fda41b7ec4de46b43cb7ea42a45001ae393d5 a79ac3be9377639e1c7d1edf1ae1b3a5f0ccd8a9 M	Z/MD
:100644 100644 4ca22bae2527d3d9e1676498a0fba3b355bd1278 61422ba9c2c873416061a88cd40a59a35b576474 M	Z/MM
:100644 100644 b16d7b25b869f2beb124efa53467d8a1550ad694 a5c544c21cfcb07eb80a4d89a5b7d1570002edfd M	Z/MN
EOF
cat >.test-plain-OB <<\EOF
:000000 100644 0000000000000000000000000000000000000000 6aa2b5335b16431a0ef71e5c0a28be69183cf6a2 A	AA
:100644 000000 bcc68ef997017466d5c9094bcf7692295f588c9a 0000000000000000000000000000000000000000 D	DD
:000000 100644 0000000000000000000000000000000000000000 71420ab81e254145d26d6fc0cddee64c1acd4787 A	DF
:100644 100644 141c1f1642328e4bc46a7d801a71da392e66791e 3c4d8de5fbad08572bab8e10eef8dbb264cf0231 M	DM
:000000 100644 0000000000000000000000000000000000000000 1d41122ebdd7a640f29d3c9cc4f9d70094374762 A	LL
:100644 000000 03f24c8c4700babccfd28b654e7e8eac402ad6cd 0000000000000000000000000000000000000000 D	MD
:100644 100644 b258508afb7ceb449981bd9d63d2d3e971bf8d34 19989d4559aae417fedee240ccf2ba315ea4dc2b M	MM
:000000 100644 0000000000000000000000000000000000000000 15885881ea69115351c09b38371f0348a3fb8c67 A	NA
:100644 000000 a4e179e4291e5536a5e1c82e091052772d2c5a93 0000000000000000000000000000000000000000 D	ND
:100644 100644 c8f25781e8f1792e3e40b74225e20553041b5226 cdb9a8c3da571502ac30225e9c17beccb8387983 M	NM
:100644 100644 40c959f984c8b89a2b02520d17f00d717f024397 2ac547ae9614a00d1b28275de608131f7a0e259f M	SS
:100644 100644 4ac13458899ab908ef3b1128fa378daefc88d356 c4e4a12231b9fa79a0053cb6077fcb21bb5b135a M	TT
:040000 040000 7d670fdcdb9929f6c7dac196ff78689cd1c566a1 1ba523955d5160681af65cb776411f574c1e8155 M	Z
EOF
cat >.test-recursive-OB <<\EOF
:000000 100644 0000000000000000000000000000000000000000 6aa2b5335b16431a0ef71e5c0a28be69183cf6a2 A	AA
:100644 000000 bcc68ef997017466d5c9094bcf7692295f588c9a 0000000000000000000000000000000000000000 D	DD
:000000 100644 0000000000000000000000000000000000000000 71420ab81e254145d26d6fc0cddee64c1acd4787 A	DF
:100644 100644 141c1f1642328e4bc46a7d801a71da392e66791e 3c4d8de5fbad08572bab8e10eef8dbb264cf0231 M	DM
:000000 100644 0000000000000000000000000000000000000000 1d41122ebdd7a640f29d3c9cc4f9d70094374762 A	LL
:100644 000000 03f24c8c4700babccfd28b654e7e8eac402ad6cd 0000000000000000000000000000000000000000 D	MD
:100644 100644 b258508afb7ceb449981bd9d63d2d3e971bf8d34 19989d4559aae417fedee240ccf2ba315ea4dc2b M	MM
:000000 100644 0000000000000000000000000000000000000000 15885881ea69115351c09b38371f0348a3fb8c67 A	NA
:100644 000000 a4e179e4291e5536a5e1c82e091052772d2c5a93 0000000000000000000000000000000000000000 D	ND
:100644 100644 c8f25781e8f1792e3e40b74225e20553041b5226 cdb9a8c3da571502ac30225e9c17beccb8387983 M	NM
:100644 100644 40c959f984c8b89a2b02520d17f00d717f024397 2ac547ae9614a00d1b28275de608131f7a0e259f M	SS
:100644 100644 4ac13458899ab908ef3b1128fa378daefc88d356 c4e4a12231b9fa79a0053cb6077fcb21bb5b135a M	TT
:000000 100644 0000000000000000000000000000000000000000 6c0b99286d0bce551ac4a7b3dff8b706edff3715 A	Z/AA
:100644 000000 879007efae624d2b1307214b24a956f0a8d686a8 0000000000000000000000000000000000000000 D	Z/DD
:100644 100644 9b541b2275c06e3a7b13f28badf5294e2ae63df4 d77371d15817fcaa57eeec27f770c505ba974ec1 M	Z/DM
:100644 000000 d41fda41b7ec4de46b43cb7ea42a45001ae393d5 0000000000000000000000000000000000000000 D	Z/MD
:100644 100644 4ca22bae2527d3d9e1676498a0fba3b355bd1278 697aad7715a1e7306ca76290a3dd4208fbaeddfa M	Z/MM
:000000 100644 0000000000000000000000000000000000000000 d12979c22fff69c59ca9409e7a8fe3ee25eaee80 A	Z/NA
:100644 000000 a18393c636b98e9bd7296b8b437ea4992b72440c 0000000000000000000000000000000000000000 D	Z/ND
:100644 100644 3fdbe17fd013303a2e981e1ca1c6cd6e72789087 7e09d6a3a14bd630913e8c75693cea32157b606d M	Z/NM
EOF
cat >.test-plain-AB <<\EOF
:100644 100644 ccba72ad3888a3520b39efcf780b9ee64167535d 6aa2b5335b16431a0ef71e5c0a28be69183cf6a2 M	AA
:100644 000000 7e426fb079479fd67f6d81f984e4ec649a44bc25 0000000000000000000000000000000000000000 D	AN
:000000 100644 0000000000000000000000000000000000000000 71420ab81e254145d26d6fc0cddee64c1acd4787 A	DF
:040000 000000 6d50f65d3bdab91c63444294d38f08aeff328e42 0000000000000000000000000000000000000000 D	DF
:000000 100644 0000000000000000000000000000000000000000 3c4d8de5fbad08572bab8e10eef8dbb264cf0231 A	DM
:000000 100644 0000000000000000000000000000000000000000 35abde1506ddf806572ff4d407bd06885d0f8ee9 A	DN
:100644 000000 103d9f89b50b9aad03054b579be5e7aa665f2d57 0000000000000000000000000000000000000000 D	MD
:100644 100644 b431b272d829ff3aa4d1a5085f4394ab4d3305b6 19989d4559aae417fedee240ccf2ba315ea4dc2b M	MM
:100644 100644 a716d58de4a570e0038f5c307bd8db34daea021f bd084b0c27c7b6cc34f11d6d0509a29be3caf970 M	MN
:000000 100644 0000000000000000000000000000000000000000 15885881ea69115351c09b38371f0348a3fb8c67 A	NA
:100644 000000 a4e179e4291e5536a5e1c82e091052772d2c5a93 0000000000000000000000000000000000000000 D	ND
:100644 100644 c8f25781e8f1792e3e40b74225e20553041b5226 cdb9a8c3da571502ac30225e9c17beccb8387983 M	NM
:100644 100644 4c86f9a85fbc5e6804ee2e17a797538fbe785bca c4e4a12231b9fa79a0053cb6077fcb21bb5b135a M	TT
:040000 040000 5e5f22072bb39f6e12cf663a57cb634c76eefb49 1ba523955d5160681af65cb776411f574c1e8155 M	Z
EOF
cat >.test-recursive-AB <<\EOF
:100644 100644 ccba72ad3888a3520b39efcf780b9ee64167535d 6aa2b5335b16431a0ef71e5c0a28be69183cf6a2 M	AA
:100644 000000 7e426fb079479fd67f6d81f984e4ec649a44bc25 0000000000000000000000000000000000000000 D	AN
:000000 100644 0000000000000000000000000000000000000000 71420ab81e254145d26d6fc0cddee64c1acd4787 A	DF
:100644 000000 68a6d8b91da11045cf4aa3a5ab9f2a781c701249 0000000000000000000000000000000000000000 D	DF/DF
:000000 100644 0000000000000000000000000000000000000000 3c4d8de5fbad08572bab8e10eef8dbb264cf0231 A	DM
:000000 100644 0000000000000000000000000000000000000000 35abde1506ddf806572ff4d407bd06885d0f8ee9 A	DN
:100644 000000 103d9f89b50b9aad03054b579be5e7aa665f2d57 0000000000000000000000000000000000000000 D	MD
:100644 100644 b431b272d829ff3aa4d1a5085f4394ab4d3305b6 19989d4559aae417fedee240ccf2ba315ea4dc2b M	MM
:100644 100644 a716d58de4a570e0038f5c307bd8db34daea021f bd084b0c27c7b6cc34f11d6d0509a29be3caf970 M	MN
:000000 100644 0000000000000000000000000000000000000000 15885881ea69115351c09b38371f0348a3fb8c67 A	NA
:100644 000000 a4e179e4291e5536a5e1c82e091052772d2c5a93 0000000000000000000000000000000000000000 D	ND
:100644 100644 c8f25781e8f1792e3e40b74225e20553041b5226 cdb9a8c3da571502ac30225e9c17beccb8387983 M	NM
:100644 100644 4c86f9a85fbc5e6804ee2e17a797538fbe785bca c4e4a12231b9fa79a0053cb6077fcb21bb5b135a M	TT
:100644 100644 8acb8e9750e3f644bf323fcf3d338849db106c77 6c0b99286d0bce551ac4a7b3dff8b706edff3715 M	Z/AA
:100644 000000 087494262084cefee7ed484d20c8dc0580791272 0000000000000000000000000000000000000000 D	Z/AN
:000000 100644 0000000000000000000000000000000000000000 d77371d15817fcaa57eeec27f770c505ba974ec1 A	Z/DM
:000000 100644 0000000000000000000000000000000000000000 beb5d38c55283d280685ea21a0e50cfcc0ca064a A	Z/DN
:100644 000000 a79ac3be9377639e1c7d1edf1ae1b3a5f0ccd8a9 0000000000000000000000000000000000000000 D	Z/MD
:100644 100644 61422ba9c2c873416061a88cd40a59a35b576474 697aad7715a1e7306ca76290a3dd4208fbaeddfa M	Z/MM
:100644 100644 a5c544c21cfcb07eb80a4d89a5b7d1570002edfd b16d7b25b869f2beb124efa53467d8a1550ad694 M	Z/MN
:000000 100644 0000000000000000000000000000000000000000 d12979c22fff69c59ca9409e7a8fe3ee25eaee80 A	Z/NA
:100644 000000 a18393c636b98e9bd7296b8b437ea4992b72440c 0000000000000000000000000000000000000000 D	Z/ND
:100644 100644 3fdbe17fd013303a2e981e1ca1c6cd6e72789087 7e09d6a3a14bd630913e8c75693cea32157b606d M	Z/NM
EOF

x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
x40="$x40$x40$x40$x40$x40$x40$x40$x40"
z40='0000000000000000000000000000000000000000'
cmp_diff_files_output () {
    # diff-files never reports additions.  Also it does not fill in the
    # object ID for the changed files because it wants you to look at the
    # filesystem.
    sed <"$2" >.test-tmp \
	-e '/^:000000 /d;s/'$x40'\( [MCRNDU][0-9]*\)	/'$z40'\1	/' &&
    diff "$1" .test-tmp
}

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree $tree_O $tree_A >.test-a &&
     cmp -s .test-a .test-plain-OA'

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree -r $tree_O $tree_A >.test-a &&
     cmp -s .test-a .test-recursive-OA'

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree $tree_O $tree_B >.test-a &&
     cmp -s .test-a .test-plain-OB'

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree -r $tree_O $tree_B >.test-a &&
     cmp -s .test-a .test-recursive-OB'

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree $tree_A $tree_B >.test-a &&
     cmp -s .test-a .test-plain-AB'

test_expect_success \
    'diff-tree of known trees.' \
    'git diff-tree -r $tree_A $tree_B >.test-a &&
     cmp -s .test-a .test-recursive-AB'

test_expect_success \
    'diff-tree --stdin of known trees.' \
    'echo $tree_A $tree_B | git diff-tree --stdin > .test-a &&
     echo $tree_A $tree_B > .test-plain-ABx &&
     cat .test-plain-AB >> .test-plain-ABx &&
     cmp -s .test-a .test-plain-ABx'

test_expect_success \
    'diff-tree --stdin of known trees.' \
    'echo $tree_A $tree_B | git diff-tree -r --stdin > .test-a &&
     echo $tree_A $tree_B > .test-recursive-ABx &&
     cat .test-recursive-AB >> .test-recursive-ABx &&
     cmp -s .test-a .test-recursive-ABx'

test_expect_success \
    'diff-cache O with A in cache' \
    'git read-tree $tree_A &&
     git diff-index --cached $tree_O >.test-a &&
     cmp -s .test-a .test-recursive-OA'

test_expect_success \
    'diff-cache O with B in cache' \
    'git read-tree $tree_B &&
     git diff-index --cached $tree_O >.test-a &&
     cmp -s .test-a .test-recursive-OB'

test_expect_success \
    'diff-cache A with B in cache' \
    'git read-tree $tree_B &&
     git diff-index --cached $tree_A >.test-a &&
     cmp -s .test-a .test-recursive-AB'

test_expect_success \
    'diff-files with O in cache and A checked out' \
    'rm -fr Z [A-Z][A-Z] &&
     git read-tree $tree_A &&
     git checkout-index -f -a &&
     git read-tree --reset $tree_O || return 1
     git update-index --refresh >/dev/null ;# this can exit non-zero
     git diff-files >.test-a &&
     cmp_diff_files_output .test-a .test-recursive-OA'

test_expect_success \
    'diff-files with O in cache and B checked out' \
    'rm -fr Z [A-Z][A-Z] &&
     git read-tree $tree_B &&
     git checkout-index -f -a &&
     git read-tree --reset $tree_O || return 1
     git update-index --refresh >/dev/null ;# this can exit non-zero
     git diff-files >.test-a &&
     cmp_diff_files_output .test-a .test-recursive-OB'

test_expect_success \
    'diff-files with A in cache and B checked out' \
    'rm -fr Z [A-Z][A-Z] &&
     git read-tree $tree_B &&
     git checkout-index -f -a &&
     git read-tree --reset $tree_A || return 1
     git update-index --refresh >/dev/null ;# this can exit non-zero
     git diff-files >.test-a &&
     cmp_diff_files_output .test-a .test-recursive-AB'

################################################################
# Now we have established the baseline, we do not have to
# rely on individual object ID values that much.

test_expect_success \
    'diff-tree O A == diff-tree -R A O' \
    'git diff-tree $tree_O $tree_A >.test-a &&
    git diff-tree -R $tree_A $tree_O >.test-b &&
    cmp -s .test-a .test-b'

test_expect_success \
    'diff-tree -r O A == diff-tree -r -R A O' \
    'git diff-tree -r $tree_O $tree_A >.test-a &&
    git diff-tree -r -R $tree_A $tree_O >.test-b &&
    cmp -s .test-a .test-b'

test_expect_success \
    'diff-tree B A == diff-tree -R A B' \
    'git diff-tree $tree_B $tree_A >.test-a &&
    git diff-tree -R $tree_A $tree_B >.test-b &&
    cmp -s .test-a .test-b'

test_expect_success \
    'diff-tree -r B A == diff-tree -r -R A B' \
    'git diff-tree -r $tree_B $tree_A >.test-a &&
    git diff-tree -r -R $tree_A $tree_B >.test-b &&
    cmp -s .test-a .test-b'

test_expect_success \
    'diff can read from stdin' \
    'test_must_fail git diff --no-index -- MN - < NN |
        grep -v "^index" | sed "s#/-#/NN#" >.test-a &&
    test_must_fail git diff --no-index -- MN NN |
        grep -v "^index" >.test-b &&
    test_cmp .test-a .test-b'

test_done
; Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230824041330.266337-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-24perf pmu: Make the loading of formats lazyIan Rogers4-65/+106 The sysfs format files are loaded eagerly in a PMU. Add a flag so that we create the format but only load the contents when necessary. Reduce the size of the value in struct perf_pmu_format and avoid holes so there is no additional space requirement. For "perf stat -e cycles true" this reduces the number of openat calls from 648 to 573 (about 12%). The benchmark pmu scan speed is improved by roughly 5%. Before: $ perf bench internals pmu-scan Computing performance of sysfs PMU event scan for 100 times Average core PMU scanning took: 1061.100 usec (+- 9.965 usec) Average PMU scanning took: 4725.300 usec (+- 260.599 usec) After: $ perf bench internals pmu-scan Computing performance of sysfs PMU event scan for 100 times Average core PMU scanning took: 989.170 usec (+- 6.873 usec) Average PMU scanning took: 4520.960 usec (+- 251.272 usec) Committer testing: On a AMD Ryzen 5950x: Before: $ perf bench internals pmu-scan -i1000 # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 563.466 usec (+- 1.008 usec) Average PMU scanning took: 1619.174 usec (+- 23.627 usec) $ perf stat -r5 perf bench internals pmu-scan -i1000 # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 583.401 usec (+- 2.098 usec) Average PMU scanning took: 1677.352 usec (+- 24.636 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 553.254 usec (+- 0.825 usec) Average PMU scanning took: 1635.655 usec (+- 24.312 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 557.733 usec (+- 0.980 usec) Average PMU scanning took: 1600.659 usec (+- 23.344 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 554.906 usec (+- 0.774 usec) Average PMU scanning took: 1595.338 usec (+- 23.288 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 551.798 usec (+- 0.967 usec) Average PMU scanning took: 1623.213 usec (+- 23.998 usec) Performance counter stats for 'perf bench internals pmu-scan -i1000' (5 runs): 3276.82 msec task-clock:u # 0.990 CPUs utilized ( +- 0.82% ) 0 context-switches:u # 0.000 /sec 0 cpu-migrations:u # 0.000 /sec 1008 page-faults:u # 307.615 /sec ( +- 0.04% ) 12049614778 cycles:u # 3.677 GHz ( +- 0.07% ) (83.34%) 117507478 stalled-cycles-frontend:u # 0.98% frontend cycles idle ( +- 0.33% ) (83.32%) 27106761 stalled-cycles-backend:u # 0.22% backend cycles idle ( +- 9.55% ) (83.36%) 33294953848 instructions:u # 2.76 insn per cycle # 0.00 stalled cycles per insn ( +- 0.03% ) (83.31%) 6849825049 branches:u # 2.090 G/sec ( +- 0.03% ) (83.37%) 71533903 branch-misses:u # 1.04% of all branches ( +- 0.20% ) (83.30%) 3.3088 +- 0.0302 seconds time elapsed ( +- 0.91% ) $ After: $ perf stat -r5 perf bench internals pmu-scan -i1000 # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 550.702 usec (+- 0.958 usec) Average PMU scanning took: 1566.577 usec (+- 22.747 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 548.315 usec (+- 0.555 usec) Average PMU scanning took: 1565.499 usec (+- 22.760 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 548.073 usec (+- 0.555 usec) Average PMU scanning took: 1586.097 usec (+- 23.299 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 561.184 usec (+- 2.709 usec) Average PMU scanning took: 1567.153 usec (+- 22.548 usec) # Running 'internals/pmu-scan' benchmark: Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 546.987 usec (+- 0.553 usec) Average PMU scanning took: 1562.814 usec (+- 22.729 usec) Performance counter stats for 'perf bench internals pmu-scan -i1000' (5 runs): 3170.86 msec task-clock:u # 0.992 CPUs utilized ( +- 0.22% ) 0 context-switches:u # 0.000 /sec 0 cpu-migrations:u # 0.000 /sec 1010 page-faults:u # 318.526 /sec ( +- 0.04% ) 11890047674 cycles:u # 3.750 GHz ( +- 0.14% ) (83.27%) 119090499 stalled-cycles-frontend:u # 1.00% frontend cycles idle ( +- 0.46% ) (83.40%) 32502449 stalled-cycles-backend:u # 0.27% backend cycles idle ( +- 8.32% ) (83.30%) 33119141261 instructions:u # 2.79 insn per cycle # 0.00 stalled cycles per insn ( +- 0.01% ) (83.37%) 6812816561 branches:u # 2.149 G/sec ( +- 0.01% ) (83.29%) 70157855 branch-misses:u # 1.03% of all branches ( +- 0.28% ) (83.38%) 3.19710 +- 0.00826 seconds time elapsed ( +- 0.26% ) $ Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230824041330.266337-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf build: Allow customization of clang options for BPF targetGuilherme Amadio1-1/+6 This also puts an unconditional -Werror under control of WERROR. The clang includes added during the build can lead to a warning that may be turned into an error. In addition, hardened clang produces a warning about lack of support for -fstack-protector* options for the BPF target: clang -g -O2 -target bpf -Wall -Werror -Ilinux/tools/perf/util/bpf_skel/.tmp/.. \ -I -idirafter /usr/lib/llvm/16/bin/../../../../lib/clang/16/include -idirafter /usr/local/include \ -idirafter /usr/include -Ilinux/tools/include/uapi -c util/bpf_skel/bperf_follower.bpf.c \ -o linux/tools/perf/util/bpf_skel/.tmp/bperf_follower.bpf.o && llvm-strip -g linux/tools/perf/util/bpf_skel/.tmp/bperf_follower.bpf.o clang-16: error: /usr/lib/llvm/16/bin/../../../../lib/clang/16/include: 'linker' input unused [-Werror,-Wunused-command-line-argument] clang-16: error: ignoring '-fstack-protector-strong' option as it is not currently supported for target 'bpf' [-Werror,-Woption-ignored] make[1]: *** [Makefile.perf:1082: linux/tools/perf/util/bpf_skel/.tmp/bpf_prog_profiler.bpf.o] Error 1 Signed-off-by: Guilherme Amadio <amadio@gentoo.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/ZOZQ2LDA+3Wg8x2T@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Pass PMU rather than aliases and formatIan Rogers4-65/+62 Pass the pmu so the aliases and format list can be better abstracted and later lazily loaded. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-9-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Avoid passing format list to perf_pmu__format_bits()Ian Rogers6-16/+15 Pass the PMU so the format list can be better abstracted and later lazily loaded. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-8-irogers@google.com [ Did missing conversions in tools/perf/arch/arm*/util/cs-etm.c ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Avoid passing format list to perf_pmu__format_typeIan Rogers3-4/+4 Pass the pmu so the format list can be better abstracted and later lazily loaded. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-7-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Avoid passing format list to perf_pmu__config_terms()Ian Rogers4-67/+61 Abstract the format list better, hiding it in the PMU, by changing perf_pmu__config_terms() the PMU rather than the format list in the PMU. Change the PMU test to pass a dummy PMU for this purpose. Changing the test allows perf_pmu__del_formats() to become static. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Reduce scope of perf_pmu_error()Ian Rogers2-2/+3 Move declaration from header file to pmu.y and make static. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Move perf_pmu__set_format to pmu.yIan Rogers3-13/+12 Avoid having the function in the C and header file, as it is only used locally by pmu.y. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf pmu: Avoid a path name copyIan Rogers1-5/+7 Rather than read a base path and append into a 2nd path, read the base path directly into output buffer and append to that. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf script ibs: Remove unused includeIan Rogers1-1/+0 Done to reduce dependencies on pmu-events.h. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gaosheng Cui <cuigaosheng1@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230823080828.1460376-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-23perf bench breakpoint: Skip run if no breakpoints availableKajol Jain1-3/+21 Based on commit 7d54a4acd8c1de3e ("perf test: Skip watchpoint tests if no watchpoints available"), hardware breakpoints are not available for power9 platform and because of that 'perf bench breakpoint' run fails on power9 platform. Add code to check for the return value of perf_event_open() in the breakpoint run and skip the 'perf bench breakpoint' run, if hardware breakpoints are not available. Result on power9 system before patch changes: [command]# perf bench breakpoint thread perf_event_open: No such device Result on power9 system after patch changes: [command]# ./perf bench breakpoint thread Skipping perf bench breakpoint thread: No hardware support Reported-by: Disha Goel <disgoel@linux.vnet.ibm.com> Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Acked-by: Naveen N Rao <naveen@kernel.org> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Disha Goel <disgoel@linux.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20230823075103.190565-1-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-22perf lzma: Convert some pr_err() to pr_debug() as callers already use pr_debug()Arnaldo Carvalho de Melo1-7/+5 I noticed some error with: # perf list ex_ret_brn lzma: fopen failed on /usr/lib/modules/5.15.14-100.fc34.x86_64/kernel/net/bluetooth/bnep/bnep.ko.xz: 'No such file or directory' lzma: fopen failed on /usr/lib/modules/5.16.16-200.fc35.x86_64/kernel/drivers/gpu/drm/drm_kms_helper.ko.xz: 'No such file or directory' lzma: fopen failed on /usr/lib/modules/5.18.16-200.fc36.x86_64/kernel/arch/x86/crypto/crct10dif-pclmul.ko.xz: 'No such file or directory' lzma: fopen failed on /usr/lib/modules/5.16.16-200.fc35.x86_64/kernel/drivers/i2c/busses/i2c-piix4.ko.xz: 'No such file or directory' <BIG SNIP> Then using 'perf probe' + 'perf trace' to debug 'perf list', it seems its some inconsistency in the ~/.debug/ cache where broken build id symlinks that ends up making it try to uncompress some kernel modules using the lzma routines: 395.309 perf/3594447 probe_perf:lzma_decompress_to_file(__probe_ip: 6118448, input_string: "/usr/lib/modules/5.18.17-200.fc36.x86_64/kernel/drivers/nvme/host/nvme.ko.xz") lzma_decompress_to_file (/var/home/acme/bin/perf) filename__decompress (/var/home/acme/bin/perf) filename__read_build_id (/var/home/acme/bin/perf) filename__sprintf_build_id (inlined) build_id_cache__valid_id (inlined) build_id_cache__list_all (/var/home/acme/bin/perf) print_sdt_events (/var/home/acme/bin/perf) cmd_list (/var/home/acme/bin/perf) run_builtin (/var/home/acme/bin/perf) handle_internal_command (inlined) run_argv (inlined) main (/var/home/acme/bin/perf) __libc_start_call_main (/usr/lib64/libc.so.6) __libc_start_main@@GLIBC_2.34 (/usr/lib64/libc.so.6) _start (/var/home/acme/bin/perf) But callers of filename__decompress() already check its return and use pr_debug(), so be consistent and make functions it calls also use pr_debug(). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/ZOUD0+GkuCVkYF7n@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-21perf stat-display: Check if snprintf()'s fmt argument is NULLKaige Ye1-2/+2 It is undefined behavior to pass NULL as snprintf()'s fmt argument. Here is an example to trigger the problem: $ perf stat --metric-only -x, -e instructions -- sleep 1 insn per cycle, Segmentation fault (core dumped) With this patch: $ perf stat --metric-only -x, -e instructions -- sleep 1 insn per cycle, , Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Kaige Ye <ye@kaige.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/01CA7674B690CA24+20230804020907.144562-2-ye@kaige.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-21perf bpf augmented_raw_syscalls: Add an assert to make sure ↵Arnaldo Carvalho de Melo1-0/+1 sizeof(augmented_arg->value) is a power of two. Similar to what was done in the previous cset for sizeof(saddr), we need to make sure sizeof(augmented_arg->value) is a power of two to do bounds checking using &=: augmented_len &= sizeof(augmented_arg->value) - 1; Suggested-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/ZONrPo0NSqdbXiGx@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-21perf bpf augmented_raw_syscalls: Add an assert to make sure sizeof(saddr) is ↵Arnaldo Carvalho de Melo1-0/+11 a power of two. We're using the BPF verifier suggestion: 22: (85) call bpf_probe_read#4 R2 min value is negative, either use unsigned or 'var &= const' That works only when const is a (power of two - 1) so add an assert to make sure that that is the case. Suggested-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/ZONrFmJBNlQpSpZj@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2023-08-21perf vendor events arm64: AmpereOne: Remove unsupported eventsIlkka Koskinen1-120/+0 Some of the events included in the ampereone/core-imp-def are not supported on AmpereOne, remove them. Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Dave Kleikamp <dave.kleikamp@oracle.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230803211331.140553-5-ilkka@os.amperecomputing.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>