From patchwork Tue May 21 19:03:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taylor Blau X-Patchwork-Id: 13669683 Received: from mail-qk1-f169.google.com (mail-qk1-f169.google.com [209.85.222.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3FBB149C75 for ; Tue, 21 May 2024 19:03:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716318203; cv=none; b=l8mLO/5M6NA8+iWOZH8U9OtRPkVOIN8GcxpL3fZldQtJmd96VMiFISiYV1bjJmBIaOmtsb8/3kEq19fW+h4W7d1SVEJbX2xl9XRm+CveOdzKKQ5mh1RMFCi7MTajtqErmAGEbJ+ltu1Ugl/zkM8SrfNbRH4Slp7ehKAfAgo+OLE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716318203; c=relaxed/simple; bh=/1J781I2ZkQcBClblGKFACa1qEddzLPQ3Ima4SFXNkg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bp0rdvJYSrqg+/lDNDJK6SDUrbkfM6vmQt1sMgwLSyL/o8DER1Qh8dAmll25SH3FoEHgm7f3Ck3KqswtZRKLw1JAxOKimsJ6WlSjCKXnSJ7zaNELdwyOU2AbGXxkHx/XdgTlP4/kBUQzU9nY1s1iVHcHeY2ln91/6IQUJ9jEqhk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ttaylorr.com; spf=none smtp.mailfrom=ttaylorr.com; dkim=pass (2048-bit key) header.d=ttaylorr-com.20230601.gappssmtp.com header.i=@ttaylorr-com.20230601.gappssmtp.com header.b=mvKt5xYk; arc=none smtp.client-ip=209.85.222.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ttaylorr.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ttaylorr.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ttaylorr-com.20230601.gappssmtp.com header.i=@ttaylorr-com.20230601.gappssmtp.com header.b="mvKt5xYk" Received: by mail-qk1-f169.google.com with SMTP id af79cd13be357-792b8bf806fso30879185a.0 for ; Tue, 21 May 2024 12:03:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ttaylorr-com.20230601.gappssmtp.com; s=20230601; t=1716318200; x=1716923000; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=9pJYhTRVWR6lVrJ9L1ix7SPzVX4IgOrcOaxp91LKDAE=; b=mvKt5xYk6RYOWsY2O1rVkFmlnu0aQfYlUQw9uR0nuflEVwm1iuPfdQLkx7Kck5aGcO 9cYyFc4RdB4P8vcJyU7rCouy6MBokskPFiASYKx4PGMJwr/9QxvSzk6zZXYiQojZpDAf onM9UT86ns07THnyL1uc1pAx3OcTimcWeAF+NZEzCBQnKn3xICHBEN8l1UygT9HIG68I S49SGLVznVAq3CZkc17E3dhrMCwHtsz1q4HpPLy4SxC1A9DqU9/VcOqU5avf/gzSaudQ VDHpA4zMLCl1/1FTijex0QfQoGTP9fLSPbu2U61cHEodNuaUUXimDcpoCfmlZnojWEyK JqUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716318200; x=1716923000; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=9pJYhTRVWR6lVrJ9L1ix7SPzVX4IgOrcOaxp91LKDAE=; b=viHDOJgrfjyddMVYR2s3D8cBEp1qK2cigjDBwmgo80ZNM5AYRBMVxN8csvDBv1vKF3 SxHgSt4Psat3oEfHlfBcOwIuQiIl+jlDur+Hai1fcZWQ4OorwyP+ytz2adiD4qjgkV8M SlHsMqEloVy0yn7WOsv6bmTolYa1sDc4tIGkci0dX/+bLzhQdrIhQ+8fTR8j2Z+mJYhG 2/S75RyetBWxwRIB5jYWDUQj1XQPvXXMlhZ/fJQUHDc+VupxsdE0gwP+LS14jODdAAA8 B0w5ROqIK+G6QppjhEiJzfLs81UnUGcC7rH5NSpS8K16Zyt3iDSP6OwNit5YBU981nhN Vb3g== X-Gm-Message-State: AOJu0YxRhkiArj9mc4VqtDGWFRbJRpobS+8QwLv1zN7A95FE6TQtqCX7 +IFNPxDsxYhaB9rU8trR+bp6q/fbN3W+1Pay84QhiZ9L7Sykn5HfwAO3/KQeavnsiE+1u3+vJAv 6 X-Google-Smtp-Source: AGHT+IHgdxAEPkP5Zm9qcXOHQnsaKlyeZ07CMW1rkgnjuyHCkLaUlhXbE3DNBmogtfrOWsufy7q1DQ== X-Received: by 2002:a05:620a:4143:b0:793:82:ad50 with SMTP id af79cd13be357-7930082aeadmr2149380885a.23.1716318199708; Tue, 21 May 2024 12:03:19 -0700 (PDT) Received: from localhost (104-178-186-189.lightspeed.milwwi.sbcglobal.net. [104.178.186.189]) by smtp.gmail.com with ESMTPSA id af79cd13be357-794724bb95dsm369130385a.53.2024.05.21.12.03.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 May 2024 12:03:18 -0700 (PDT) Date: Tue, 21 May 2024 15:03:17 -0400 From: Taylor Blau To: git@vger.kernel.org Cc: Jeff King , Elijah Newren , Patrick Steinhardt , Junio C Hamano Subject: [PATCH v3 30/30] t/perf: implement performace tests for pseudo-merge bitmaps Message-ID: <6a6d88fa512ba344543f5f0df33d5a61e406f3db.1716318089.git.me@ttaylorr.com> References: Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Implement a straightforward performance test demonstrating the benefit of pseudo-merge bitmaps by measuring how long it takes to count reachable objects in a few different scenarios: - without bitmaps, to demonstrate a reasonable baseline - with bitmaps, but without pseudo-merges - with bitmaps and pseudo-merges Results from running this test on git.git are as follows: Test this tree ----------------------------------------------------------------------------------- 5333.2: git rev-list --count --all --objects (no bitmaps) 3.46(3.37+0.09) 5333.3: git rev-list --count --all --objects (no pseudo-merges) 0.13(0.11+0.01) 5333.4: git rev-list --count --all --objects (with pseudo-merges) 0.12(0.11+0.01) Signed-off-by: Taylor Blau --- t/perf/p5333-pseudo-merge-bitmaps.sh | 32 ++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100755 t/perf/p5333-pseudo-merge-bitmaps.sh diff --git a/t/perf/p5333-pseudo-merge-bitmaps.sh b/t/perf/p5333-pseudo-merge-bitmaps.sh new file mode 100755 index 00000000000..4bec409d10e --- /dev/null +++ b/t/perf/p5333-pseudo-merge-bitmaps.sh @@ -0,0 +1,32 @@ +#!/bin/sh + +test_description='pseudo-merge bitmaps' +. ./perf-lib.sh + +test_perf_large_repo + +test_expect_success 'setup' ' + git \ + -c bitmapPseudoMerge.all.pattern="refs/" \ + -c bitmapPseudoMerge.all.threshold=now \ + -c bitmapPseudoMerge.all.stableThreshold=never \ + -c bitmapPseudoMerge.all.maxMerges=64 \ + -c pack.writeBitmapLookupTable=true \ + repack -adb +' + +test_perf 'git rev-list --count --all --objects (no bitmaps)' ' + git rev-list --objects --all +' + +test_perf 'git rev-list --count --all --objects (no pseudo-merges)' ' + GIT_TEST_USE_PSEDUO_MERGES=0 \ + git rev-list --objects --all --use-bitmap-index +' + +test_perf 'git rev-list --count --all --objects (with pseudo-merges)' ' + GIT_TEST_USE_PSEDUO_MERGES=1 \ + git rev-list --objects --all --use-bitmap-index +' + +test_done