From patchwork Sun Jun 26 13:10:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhradeep Chakraborty X-Patchwork-Id: 12895768 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DEBBC43334 for ; Sun, 26 Jun 2022 13:10:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234560AbiFZNKe (ORCPT ); Sun, 26 Jun 2022 09:10:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234541AbiFZNK2 (ORCPT ); Sun, 26 Jun 2022 09:10:28 -0400 Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6CB9CE08 for ; Sun, 26 Jun 2022 06:10:26 -0700 (PDT) Received: by mail-wm1-x32c.google.com with SMTP id l126-20020a1c2584000000b0039c1a10507fso4057275wml.1 for ; Sun, 26 Jun 2022 06:10:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=NACJRToHJP1PjjfvpsJUUgREmA7eTJdIN8BGQAEUa10=; b=dCt6I/RkhkTV3iJ5Dqz0oGZwVy6IlTXFe52Vf7C/H51nnMk0GSy6IDkAxnPjhq6bEH BWav9B6sj1tugXMXYkQChjm5ahpCit3uIh70Bo2ok3V0+f+drQMbvOA2SAnpiC1tW2hV HH+G9/JIwpthYjAcARBcQHlVMFK4LVzvqz3B8UogSml4VKgRPp0ZkIlkSuEXXFjbCyS7 iIFmL/WKtGUaNU8fcEs+V77cmadhsh5ZCR9LKAlP9mdFuEOYVPVj065TiJ/7I+blaVqa Nyrj5pU0AbrY254P/5LBiiLCVESHAMXdQbEiTAHczlF2GvIWp+Aw5BtXolNjCXUh6WAL +7Ng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=NACJRToHJP1PjjfvpsJUUgREmA7eTJdIN8BGQAEUa10=; b=ORF3NVJCfmQOFjj5SBtomqsxYhIrySwqnNV79kAlApbS/1f2Vj/FAGjOb/rGZXjqNM chPC3Oome9tlM5eQb3sMxvZGWn/3sP5J8X9lPGVZDranmbHim69TP5Ik8JwtUo9V8XkX 7Ho5D5dpndnRa7+9IrDYjNOK4TFo07Eygl3blX0IhDaLfNd/BJbPPxuBG159ZeUxOZ0i PMMXdYkHrcj1saaCaRkWVpVseo8VyDVp9jU+KtG8WvoOcBsC1FCh3gLPp3bjyjSnJ4Eb ZbFkVOuajwnEfDBuUwjv8ga4zwbUTS0eL0Y2q+8u73j+2tqv7PgDrVOH+IDMQTNYpy4N JSJQ== X-Gm-Message-State: AJIora8/VQCuSfM3IezB8vBWP/afFOr2j2A4KQ7omoUas+f6LY2AiuD1 6Lkn24vCVfHtRfPXFJeYx1h+rRA33GFEMQ== X-Google-Smtp-Source: AGRyM1v1yly+ybs3V5YKmx4mK2yjae5Qio8P4wEx44H96Xh97luZ0lFy/6NJjgiTzcWgikTAj4Uubg== X-Received: by 2002:a05:600c:1d17:b0:3a0:481b:f1e1 with SMTP id l23-20020a05600c1d1700b003a0481bf1e1mr2911622wms.136.1656249025059; Sun, 26 Jun 2022 06:10:25 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id f18-20020adfb612000000b002185631adf0sm7738392wre.23.2022.06.26.06.10.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Jun 2022 06:10:24 -0700 (PDT) Message-Id: <96c0041688f6139c17611203f98274988ced25ab.1656249018.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Sun, 26 Jun 2022 13:10:16 +0000 Subject: [PATCH v2 5/6] bitmap-lookup-table: add performance tests for lookup table Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: Taylor Blau , Kaartic Sivaram , Derrick Stolee , Abhradeep Chakraborty , Abhradeep Chakraborty Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Abhradeep Chakraborty From: Abhradeep Chakraborty Add performance tests to verify the performance of lookup table. Lookup table makes Git run faster in most of the cases. Below is the result of `t/perf/p5310-pack-bitmaps.sh`.`perf/p5326-multi-pack-bitmaps.sh` gives similar result. The repository used in the test is linux kernel. Test this tree -------------------------------------------------------------------------- 5310.4: repack to disk (lookup=false) 295.94(250.45+15.24) 5310.5: simulated clone 12.52(5.07+1.40) 5310.6: simulated fetch 1.89(2.94+0.24) 5310.7: pack to file (bitmap) 41.39(20.33+7.20) 5310.8: rev-list (commits) 0.98(0.59+0.12) 5310.9: rev-list (objects) 3.40(3.27+0.10) 5310.10: rev-list with tag negated via --not 0.07(0.02+0.04) --all (objects) 5310.11: rev-list with negative tag (objects) 0.23(0.16+0.06) 5310.12: rev-list count with blob:none 0.26(0.18+0.07) 5310.13: rev-list count with blob:limit=1k 6.45(5.94+0.37) 5310.14: rev-list count with tree:0 0.26(0.18+0.07) 5310.15: simulated partial clone 4.99(3.19+0.45) 5310.19: repack to disk (lookup=true) 269.67(174.70+21.33) 5310.20: simulated clone 11.03(5.07+1.11) 5310.21: simulated fetch 0.79(0.79+0.17) 5310.22: pack to file (bitmap) 43.03(20.28+7.43) 5310.23: rev-list (commits) 0.86(0.54+0.09) 5310.24: rev-list (objects) 3.35(3.26+0.07) 5310.25: rev-list with tag negated via --not 0.05(0.00+0.03) --all (objects) 5310.26: rev-list with negative tag (objects) 0.22(0.16+0.05) 5310.27: rev-list count with blob:none 0.22(0.16+0.05) 5310.28: rev-list count with blob:limit=1k 6.45(5.87+0.31) 5310.29: rev-list count with tree:0 0.22(0.16+0.05) 5310.30: simulated partial clone 5.17(3.12+0.48) Test 4-15 are tested without using lookup table. Same tests are repeated in 16-30 (using lookup table). Signed-off-by: Abhradeep Chakraborty Mentored-by: Taylor Blau Co-Mentored-by: Kaartic Sivaraam --- t/perf/p5310-pack-bitmaps.sh | 77 ++++++++++++++----------- t/perf/p5326-multi-pack-bitmaps.sh | 93 ++++++++++++++++-------------- 2 files changed, 94 insertions(+), 76 deletions(-) diff --git a/t/perf/p5310-pack-bitmaps.sh b/t/perf/p5310-pack-bitmaps.sh index 7ad4f237bc3..6ff42bdd391 100755 --- a/t/perf/p5310-pack-bitmaps.sh +++ b/t/perf/p5310-pack-bitmaps.sh @@ -16,39 +16,48 @@ test_expect_success 'setup bitmap config' ' git config pack.writebitmaps true ' -# we need to create the tag up front such that it is covered by the repack and -# thus by generated bitmaps. -test_expect_success 'create tags' ' - git tag --message="tag pointing to HEAD" perf-tag HEAD -' - -test_perf 'repack to disk' ' - git repack -ad -' - -test_full_bitmap - -test_expect_success 'create partial bitmap state' ' - # pick a commit to represent the repo tip in the past - cutoff=$(git rev-list HEAD~100 -1) && - orig_tip=$(git rev-parse HEAD) && - - # now kill off all of the refs and pretend we had - # just the one tip - rm -rf .git/logs .git/refs/* .git/packed-refs && - git update-ref HEAD $cutoff && - - # and then repack, which will leave us with a nice - # big bitmap pack of the "old" history, and all of - # the new history will be loose, as if it had been pushed - # up incrementally and exploded via unpack-objects - git repack -Ad && - - # and now restore our original tip, as if the pushes - # had happened - git update-ref HEAD $orig_tip -' - -test_partial_bitmap +test_bitmap () { + local enabled="$1" + + # we need to create the tag up front such that it is covered by the repack and + # thus by generated bitmaps. + test_expect_success 'create tags' ' + git tag --message="tag pointing to HEAD" perf-tag HEAD + ' + + test_expect_success "use lookup table: $enabled" ' + git config pack.writeBitmapLookupTable '"$enabled"' + ' + + test_perf "repack to disk (lookup=$enabled)" ' + git repack -ad + ' + + test_full_bitmap + + test_expect_success "create partial bitmap state (lookup=$enabled)" ' + # pick a commit to represent the repo tip in the past + cutoff=$(git rev-list HEAD~100 -1) && + orig_tip=$(git rev-parse HEAD) && + + # now kill off all of the refs and pretend we had + # just the one tip + rm -rf .git/logs .git/refs/* .git/packed-refs && + git update-ref HEAD $cutoff && + + # and then repack, which will leave us with a nice + # big bitmap pack of the "old" history, and all of + # the new history will be loose, as if it had been pushed + # up incrementally and exploded via unpack-objects + git repack -Ad && + + # and now restore our original tip, as if the pushes + # had happened + git update-ref HEAD $orig_tip + ' +} + +test_bitmap false +test_bitmap true test_done diff --git a/t/perf/p5326-multi-pack-bitmaps.sh b/t/perf/p5326-multi-pack-bitmaps.sh index f2fa228f16a..d67e7437493 100755 --- a/t/perf/p5326-multi-pack-bitmaps.sh +++ b/t/perf/p5326-multi-pack-bitmaps.sh @@ -6,47 +6,56 @@ test_description='Tests performance using midx bitmaps' test_perf_large_repo -# we need to create the tag up front such that it is covered by the repack and -# thus by generated bitmaps. -test_expect_success 'create tags' ' - git tag --message="tag pointing to HEAD" perf-tag HEAD -' - -test_expect_success 'start with bitmapped pack' ' - git repack -adb -' - -test_perf 'setup multi-pack index' ' - git multi-pack-index write --bitmap -' - -test_expect_success 'drop pack bitmap' ' - rm -f .git/objects/pack/pack-*.bitmap -' - -test_full_bitmap - -test_expect_success 'create partial bitmap state' ' - # pick a commit to represent the repo tip in the past - cutoff=$(git rev-list HEAD~100 -1) && - orig_tip=$(git rev-parse HEAD) && - - # now pretend we have just one tip - rm -rf .git/logs .git/refs/* .git/packed-refs && - git update-ref HEAD $cutoff && - - # and then repack, which will leave us with a nice - # big bitmap pack of the "old" history, and all of - # the new history will be loose, as if it had been pushed - # up incrementally and exploded via unpack-objects - git repack -Ad && - git multi-pack-index write --bitmap && - - # and now restore our original tip, as if the pushes - # had happened - git update-ref HEAD $orig_tip -' - -test_partial_bitmap +test_bitmap () { + local enabled="$1" + + # we need to create the tag up front such that it is covered by the repack and + # thus by generated bitmaps. + test_expect_success 'create tags' ' + git tag --message="tag pointing to HEAD" perf-tag HEAD + ' + + test_expect_success "use lookup table: $enabled" ' + git config pack.writeBitmapLookupTable '"$enabled"' + ' + + test_expect_success "start with bitmapped pack (lookup=$enabled)" ' + git repack -adb + ' + + test_perf "setup multi-pack index (lookup=$enabled)" ' + git multi-pack-index write --bitmap + ' + + test_expect_success "drop pack bitmap (lookup=$enabled)" ' + rm -f .git/objects/pack/pack-*.bitmap + ' + + test_full_bitmap + + test_expect_success "create partial bitmap state (lookup=$enabled)" ' + # pick a commit to represent the repo tip in the past + cutoff=$(git rev-list HEAD~100 -1) && + orig_tip=$(git rev-parse HEAD) && + + # now pretend we have just one tip + rm -rf .git/logs .git/refs/* .git/packed-refs && + git update-ref HEAD $cutoff && + + # and then repack, which will leave us with a nice + # big bitmap pack of the "old" history, and all of + # the new history will be loose, as if it had been pushed + # up incrementally and exploded via unpack-objects + git repack -Ad && + git multi-pack-index write --bitmap && + + # and now restore our original tip, as if the pushes + # had happened + git update-ref HEAD $orig_tip + ' +} + +test_bitmap false +test_bitmap true test_done