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[24.56.226.231]) by smtp.gmail.com with ESMTPSA id g3-20020a17090a708300b001c7e8ae7637sm808859pjk.8.2022.04.04.22.20.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Apr 2022 22:20:37 -0700 (PDT) From: nksingh85@gmail.com X-Google-Original-From: neerajsi@microsoft.com To: gitgitgadget@gmail.com Cc: Johannes.Schindelin@gmx.de, avarab@gmail.com, bagasdotme@gmail.com, git@vger.kernel.org, jeffhost@microsoft.com, neerajsi@microsoft.com, nksingh85@gmail.com, ps@pks.im, worldhello.net@gmail.com Subject: [PATCH v6 12/12] core.fsyncmethod: performance tests for batch mode Date: Mon, 4 Apr 2022 22:20:18 -0700 Message-Id: <20220405052018.11247-13-neerajsi@microsoft.com> X-Mailer: git-send-email 2.34.1.78.g86e39b8f8d In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Neeraj Singh Add basic performance tests for git commands that can add data to the object database. We cover: * git add * git stash * git update-index (via git stash) * git unpack-objects * git commit --all We cover all currently available fsync methods as well. Signed-off-by: Neeraj Singh --- t/perf/p0008-odb-fsync.sh | 82 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100755 t/perf/p0008-odb-fsync.sh diff --git a/t/perf/p0008-odb-fsync.sh b/t/perf/p0008-odb-fsync.sh new file mode 100755 index 00000000000..b3a90f30eba --- /dev/null +++ b/t/perf/p0008-odb-fsync.sh @@ -0,0 +1,82 @@ +#!/bin/sh +# +# This test measures the performance of adding new files to the object +# database. The test was originally added to measure the effect of the +# core.fsyncMethod=batch mode, which is why we are testing different values of +# that setting explicitly and creating a lot of unique objects. + +test_description="Tests performance of adding things to the object database" + +. ./perf-lib.sh + +. $TEST_DIRECTORY/lib-unique-files.sh + +test_perf_fresh_repo +test_checkout_worktree + +dir_count=10 +files_per_dir=50 +total_files=$((dir_count * files_per_dir)) + +populate_files () { + test_create_unique_files $dir_count $files_per_dir files +} + +setup_repo () { + (rm -rf .git || 1) && + git init && + test_commit first && + populate_files +} + +test_perf_fsync_cfgs () { + local method && + local cfg && + for method in none fsync batch writeout-only + do + case $method in + none) + cfg="-c core.fsync=none" + ;; + *) + cfg="-c core.fsync=loose-object -c core.fsyncMethod=$method" + esac && + + # Set GIT_TEST_FSYNC=1 explicitly since fsync is normally + # disabled by t/test-lib.sh. + if ! test_perf "$1 (fsyncMethod=$method)" \ + --setup "$2" \ + "GIT_TEST_FSYNC=1 git $cfg $3" + then + break + fi + done +} + +test_perf_fsync_cfgs "add $total_files files" \ + "setup_repo" \ + "add -- files" + +test_perf_fsync_cfgs "stash $total_files files" \ + "setup_repo" \ + "stash push -u -- files" + +test_perf_fsync_cfgs "unpack $total_files files" \ + " + setup_repo && + git -c core.fsync=none add -- files && + git -c core.fsync=none commit -q -m second && + echo HEAD | git pack-objects -q --stdout --revs >test_pack.pack && + setup_repo + " \ + "unpack-objects -q