From patchwork Wed Nov 17 01:49:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Terrell X-Patchwork-Id: 12623479 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73E42C433F5 for ; Wed, 17 Nov 2021 01:43:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4E1F363223 for ; Wed, 17 Nov 2021 01:43:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232054AbhKQBqM (ORCPT ); Tue, 16 Nov 2021 20:46:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232052AbhKQBqK (ORCPT ); Tue, 16 Nov 2021 20:46:10 -0500 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8542C061746; Tue, 16 Nov 2021 17:43:12 -0800 (PST) Received: by mail-pj1-x1033.google.com with SMTP id np3so953624pjb.4; Tue, 16 Nov 2021 17:43:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Q9zhM9rh30ohjlwji3Bv7yQWbgMzk/jVT8524khlEl4=; b=PgWcSqIy7Kcw8187ChPQDE2JmQv9/6YI4vMnjrkJHQcT3yUFFeg4uxFL15mySA9EkR PmN2dQH73hv8H5WWDi60WroefR5cRpeTYex2M0Sjprgn62YqtxrZkpaFSypsF/81DSWs UXf4xJRR2NlkijG9h2IAlpjxVcmHlW5YeoRf2oeNMlHIyw6mwREWLtDkZO14JZ/8nikR +toN3vx5ewrcAtXp0fzfYV/kXvvcihbCVZaRk8GHUVQ6Y9GGTiKlNMX5O02BDvdCMCG2 iy/xavTgu6bEkybKanhrxQL92urp+Ew3e05NgxNtXrLDC8QouLOUim5JO051jOeRqFMU j3Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Q9zhM9rh30ohjlwji3Bv7yQWbgMzk/jVT8524khlEl4=; b=KxlxkYU3B4M21UPCTQUFIE+95vST5fY+rfHvYw4DTKUTJtDP8G/P/VC71fsuUWiAHz W3fJuD1Hv5VibR8w4envVKfk5qb31NUTMP8JiXhveBZdpK+mmXoQAMfHebbHwL0xuNuE 83N19mFTa60LtdQyjPQ4pEZyTmEfViECvWf/BTw+hwRnt3UMmWat5jk9rij7pbBE3pG+ /LZqr7l9+h+2z6Iu9t562OhQyhyejDznr83AWBKZShinjySC4mtSzby0Jy5MUNDzCYYS 6NUVRiBUiOlL2Yh6xviHmO29FVjkDioMthtmUiMPg68vYBUZxLjfStk1u+kUmm9lD0RZ g64A== X-Gm-Message-State: AOAM531UWy9mJ3GiH9ce3gShm8wvJeLd7Ami+xd+iBP75wnBF2RJbapR 6qUiNgd6C3pviIy/5ouNWOmT7a6t3hU= X-Google-Smtp-Source: ABdhPJxCl0UYEXqUrOhGHfQImR9e3R/eGO+CXhzRUVODQiKEuEtGt8fmah7zuyP4+1f4CjkoI+qQfA== X-Received: by 2002:a17:902:a60b:b0:142:7621:be0b with SMTP id u11-20020a170902a60b00b001427621be0bmr49876239plq.58.1637113392214; Tue, 16 Nov 2021 17:43:12 -0800 (PST) Received: from nickserv.localdomain (c-98-35-167-56.hsd1.ca.comcast.net. [98.35.167.56]) by smtp.gmail.com with ESMTPSA id np16sm3783411pjb.6.2021.11.16.17.43.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Nov 2021 17:43:11 -0800 (PST) From: Nick Terrell To: Nick Terrell Cc: linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, Helge Deller , Geert Uytterhoeven , Linus Torvalds , kernel test robot Subject: [PATCH 1/3] lib: zstd: Fix unused variable warning Date: Tue, 16 Nov 2021 17:49:47 -0800 Message-Id: <20211117014949.1169186-2-nickrterrell@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211117014949.1169186-1-nickrterrell@gmail.com> References: <20211117014949.1169186-1-nickrterrell@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Nick Terrell Backport the fix from upstream PR #2838 [0]. Found by the Kernel test robot in [1]. [0] https://github.com/facebook/zstd/pull/2838 [1] https://lore.kernel.org/linux-mm/202111120312.833wII4i-lkp@intel.com/T/ Reported-by: kernel test robot Signed-off-by: Nick Terrell --- lib/zstd/compress/zstd_compress_superblock.c | 1 + 1 file changed, 1 insertion(+) diff --git a/lib/zstd/compress/zstd_compress_superblock.c b/lib/zstd/compress/zstd_compress_superblock.c index ee03e0aedb03..a6a8e9a2aa0e 100644 --- a/lib/zstd/compress/zstd_compress_superblock.c +++ b/lib/zstd/compress/zstd_compress_superblock.c @@ -411,6 +411,7 @@ static size_t ZSTD_seqDecompressedSize(seqStore_t const* seqStore, const seqDef* const seqDef* sp = sstart; size_t matchLengthSum = 0; size_t litLengthSum = 0; + (void)litLengthSum; while (send-sp > 0) { ZSTD_sequenceLength const seqLen = ZSTD_getSequenceLength(seqStore, sp); litLengthSum += seqLen.litLength; From patchwork Wed Nov 17 01:49:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Terrell X-Patchwork-Id: 12623481 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93632C433EF for ; Wed, 17 Nov 2021 01:43:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C28B63212 for ; Wed, 17 Nov 2021 01:43:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232525AbhKQBqN (ORCPT ); Tue, 16 Nov 2021 20:46:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232355AbhKQBqM (ORCPT ); Tue, 16 Nov 2021 20:46:12 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC7BBC061746; Tue, 16 Nov 2021 17:43:14 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id o14so753746plg.5; Tue, 16 Nov 2021 17:43:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=1eIUFkqmgQBeIM3a2SS7Z1qHzuY/2QZbKVIhYF2s6CM=; b=LhnOPRD/I2LCrwnDqXM6sQieU7tUSe2Hy1OAc253hiIZ+RF3NA8mIfkvJXFFIg71Hf FZZ5OjKpoqXlbCqea5Sg+8t1Dvmj3xOtaxejw43iWP5NVWutwzdZh07aKFHSBZPu8X7X gNaxzYECHZ6r/pv/shpAJdJhnrWeR+mW/lPWs5DNdPDi4GmaKslRzzARY7ZrB+EZsVBW /8Mu0D/1aK7ZVEckzquzrE50GsJhQizCJABsEVUEtt/AMwnnS1wM7j5kF7wdEaOg3ywB knIJnLcY8hf4IbcTQl5SmmKiiS4PGsHKUodNggEiDKQCk6fe2DvvUD54KOY9cXrrUHji Ie0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1eIUFkqmgQBeIM3a2SS7Z1qHzuY/2QZbKVIhYF2s6CM=; b=urummQdaxXPPEaEz4GTXsa4Tn0brweMi3rLVqxCpDvxQd0n55kBTIMVC0a8qI3KgEq 1La3LPtVQQaKwRNEsAcU3/QNYu0Lx5h/+Yj/QxcRto/WSa1bBMk+o9o7mNLrPXwuumVD fxE1zSVAopRlXEsYthNAxN7LsLBB5ExrNSSa8Mc2whARdZP0INSHIZFuT5o1T4fRWGGr CD7i/w0urxhFR92yB9rjCPFEuXU6qigcLPdttbd1q+7R3YTJNKtoEQqZQufEandy/aPj bmh8kRRoOOFzA1fMfAtVFurmQPAPZtU4t3dVYNjb+wYqimvHfgYOPgh5tVViho1z7iIW cVsw== X-Gm-Message-State: AOAM533isOOq3JXADlQLTXNbKL0zYDPVYABaev95HQY/h+pBr6p8hRoV HZL47esKcKmZXenaA6tvB1o= X-Google-Smtp-Source: ABdhPJzRw1dO1GikNUfBTpxL074oiEKVoVJq/uHYWUu0ZgnvZOTzcqst17xBxZp1Wd8ysH/RpRpeFA== X-Received: by 2002:a17:902:7289:b0:142:805f:e2c with SMTP id d9-20020a170902728900b00142805f0e2cmr49927599pll.42.1637113394313; Tue, 16 Nov 2021 17:43:14 -0800 (PST) Received: from nickserv.localdomain (c-98-35-167-56.hsd1.ca.comcast.net. [98.35.167.56]) by smtp.gmail.com with ESMTPSA id np16sm3783411pjb.6.2021.11.16.17.43.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Nov 2021 17:43:13 -0800 (PST) From: Nick Terrell To: Nick Terrell Cc: linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, Helge Deller , Geert Uytterhoeven , Linus Torvalds Subject: [PATCH 2/3] lib: zstd: Don't inline functions in zstd_opt.c Date: Tue, 16 Nov 2021 17:49:48 -0800 Message-Id: <20211117014949.1169186-3-nickrterrell@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211117014949.1169186-1-nickrterrell@gmail.com> References: <20211117014949.1169186-1-nickrterrell@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Nick Terrell `zstd_opt.c` contains the match finder for the highest compression levels. These levels are already very slow, and are unlikely to be used in the kernel. If they are used, they shouldn't be used in latency sensitive workloads, so slowing them down shouldn't be a big deal. This saves 188 KB of the 288 KB regression reported by Geert Uytterhoeven [0]. I've also opened an issue upstream [1] so that we can properly tackle the code size issue in `zstd_opt.c` for all users, and can hopefully remove this hack in the next zstd version we import. Bloat-o-meter output on x86-64: ``` > ../scripts/bloat-o-meter vmlinux.old vmlinux add/remove: 6/5 grow/shrink: 1/9 up/down: 16673/-209939 (-193266) Function old new delta ZSTD_compressBlock_opt_generic.constprop - 7559 +7559 ZSTD_insertBtAndGetAllMatches - 6304 +6304 ZSTD_insertBt1 - 1731 +1731 ZSTD_storeSeq - 693 +693 ZSTD_BtGetAllMatches - 255 +255 ZSTD_updateRep - 128 +128 ZSTD_updateTree 96 99 +3 ZSTD_insertAndFindFirstIndexHash3 81 - -81 ZSTD_setBasePrices.constprop 98 - -98 ZSTD_litLengthPrice.constprop 138 - -138 ZSTD_count 362 181 -181 ZSTD_count_2segments 1407 938 -469 ZSTD_insertBt1.constprop 2689 - -2689 ZSTD_compressBlock_btultra2 19990 423 -19567 ZSTD_compressBlock_btultra 19633 15 -19618 ZSTD_initStats_ultra 19825 - -19825 ZSTD_compressBlock_btopt 20374 12 -20362 ZSTD_compressBlock_btopt_extDict 29984 12 -29972 ZSTD_compressBlock_btultra_extDict 30718 15 -30703 ZSTD_compressBlock_btopt_dictMatchState 32689 12 -32677 ZSTD_compressBlock_btultra_dictMatchState 33574 15 -33559 Total: Before=6611828, After=6418562, chg -2.92% ``` [0] https://lkml.org/lkml/2021/11/14/189 [1] https://github.com/facebook/zstd/issues/2862 Reported-by: Geert Uytterhoeven Signed-off-by: Nick Terrell --- lib/zstd/common/compiler.h | 7 +++++++ lib/zstd/compress/zstd_opt.c | 14 +++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/lib/zstd/common/compiler.h b/lib/zstd/common/compiler.h index a1a051e4bce6..f5a9c70a228a 100644 --- a/lib/zstd/common/compiler.h +++ b/lib/zstd/common/compiler.h @@ -16,6 +16,7 @@ *********************************************************/ /* force inlining */ +#if !defined(ZSTD_NO_INLINE) #if (defined(__GNUC__) && !defined(__STRICT_ANSI__)) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ # define INLINE_KEYWORD inline #else @@ -24,6 +25,12 @@ #define FORCE_INLINE_ATTR __attribute__((always_inline)) +#else + +#define INLINE_KEYWORD +#define FORCE_INLINE_ATTR + +#endif /* On MSVC qsort requires that functions passed into it use the __cdecl calling conversion(CC). diff --git a/lib/zstd/compress/zstd_opt.c b/lib/zstd/compress/zstd_opt.c index 04337050fe9a..09483f518dc3 100644 --- a/lib/zstd/compress/zstd_opt.c +++ b/lib/zstd/compress/zstd_opt.c @@ -8,6 +8,18 @@ * You may select, at your option, one of the above-listed licenses. */ +/* + * Disable inlining for the optimal parser for the kernel build. + * It is unlikely to be used in the kernel, and where it is used + * latency shouldn't matter because it is very slow to begin with. + * We prefer a ~180KB binary size win over faster optimal parsing. + * + * TODO(https://github.com/facebook/zstd/issues/2862): + * Improve the code size of the optimal parser in general, so we + * don't need this hack for the kernel build. + */ +#define ZSTD_NO_INLINE 1 + #include "zstd_compress_internal.h" #include "hist.h" #include "zstd_opt.h" @@ -894,7 +906,7 @@ static void ZSTD_optLdm_processMatchCandidate(ZSTD_optLdm_t* optLdm, ZSTD_match_ */ U32 posOvershoot = currPosInBlock - optLdm->endPosInBlock; ZSTD_optLdm_skipRawSeqStoreBytes(&optLdm->seqStore, posOvershoot); - } + } ZSTD_opt_getNextMatchAndUpdateSeqStore(optLdm, currPosInBlock, remainingBytes); } ZSTD_optLdm_maybeAddMatch(matches, nbMatches, optLdm, currPosInBlock); From patchwork Wed Nov 17 01:49:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Terrell X-Patchwork-Id: 12623483 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FC4EC4332F for ; Wed, 17 Nov 2021 01:43:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3966563244 for ; Wed, 17 Nov 2021 01:43:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232498AbhKQBqO (ORCPT ); Tue, 16 Nov 2021 20:46:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232550AbhKQBqN (ORCPT ); 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[98.35.167.56]) by smtp.gmail.com with ESMTPSA id np16sm3783411pjb.6.2021.11.16.17.43.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Nov 2021 17:43:15 -0800 (PST) From: Nick Terrell To: Nick Terrell Cc: linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, Helge Deller , Geert Uytterhoeven , Linus Torvalds Subject: [PATCH 3/3] lib: zstd: Don't add -O3 to cflags Date: Tue, 16 Nov 2021 17:49:49 -0800 Message-Id: <20211117014949.1169186-4-nickrterrell@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211117014949.1169186-1-nickrterrell@gmail.com> References: <20211117014949.1169186-1-nickrterrell@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Nick Terrell After the update to zstd-1.4.10 passing -O3 is no longer necessary to get good performance from zstd. Using the default optimization level -O2 is sufficient to get good performance. I've measured no significant change to compression speed, and a ~1% decompression speed loss, which is acceptable. This fixes the reported parisc -Wframe-larger-than=1536 errors [0]. The gcc-8-hppa-linux-gnu compiler performed very poorly with -O3, generating stacks that are ~3KB. With -O2 these same functions generate stacks in the < 100B, completely fixing the problem. Function size deltas are listed below: ZSTD_compressBlock_fast_extDict_generic: 3800 -> 68 ZSTD_compressBlock_fast: 2216 -> 40 ZSTD_compressBlock_fast_dictMatchState: 1848 -> 64 ZSTD_compressBlock_doubleFast_extDict_generic: 3744 -> 76 ZSTD_fillDoubleHashTable: 3252 -> 0 ZSTD_compressBlock_doubleFast: 5856 -> 36 ZSTD_compressBlock_doubleFast_dictMatchState: 5380 -> 84 ZSTD_copmressBlock_lazy2: 2420 -> 72 Additionally, this improves the reported code bloat [1]. With gcc-11 bloat-o-meter shows an 80KB code size improvement: ``` > ../scripts/bloat-o-meter vmlinux.old vmlinux add/remove: 31/8 grow/shrink: 24/155 up/down: 25734/-107924 (-82190) Total: Before=6418562, After=6336372, chg -1.28% ``` Compared to before the zstd-1.4.10 update we see a total code size regression of 105KB, down from 374KB at v5.16-rc1: ``` > ../scripts/bloat-o-meter vmlinux.old vmlinux add/remove: 292/62 grow/shrink: 56/88 up/down: 235009/-127487 (107522) Total: Before=6228850, After=6336372, chg +1.73% ``` [0] https://lkml.org/lkml/2021/11/15/710 [1] https://lkml.org/lkml/2021/11/14/189 Reported-by: Geert Uytterhoeven Signed-off-by: Nick Terrell --- lib/zstd/Makefile | 2 -- 1 file changed, 2 deletions(-) diff --git a/lib/zstd/Makefile b/lib/zstd/Makefile index 65218ec5b8f2..fc45339fc3a3 100644 --- a/lib/zstd/Makefile +++ b/lib/zstd/Makefile @@ -11,8 +11,6 @@ obj-$(CONFIG_ZSTD_COMPRESS) += zstd_compress.o obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd_decompress.o -ccflags-y += -O3 - zstd_compress-y := \ zstd_compress_module.o \ common/debug.o \