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65d1f5507e
In addition to keeping the kernel's copy of zstd up to date, this update was requested by Intel to expose upstream's APIs that allow QAT to accelerate the LZ match finding stage of Zstd. This patch is imported from the upstream tag v1.5.7-kernel [0], which is signed with upstream's signing key EF8FE99528B52FFD [1]. It was imported from upstream using this command: export ZSTD=/path/to/repo/zstd/ export LINUX=/path/to/repo/linux/ cd "$ZSTD/contrib/linux-kernel" git checkout v1.5.7-kernel make import LINUX="$LINUX" This patch has been tested on x86-64, and has been boot tested with a zstd compressed kernel & initramfs on i386 and aarch64. I benchmarked the patch on x86-64 with gcc-14.2.1 on an Intel i9-9900K by measruing the performance of compressed filesystem reads and writes. Component, Level, Size delta, C. time delta, D. time delta Btrfs , 1, +0.00%, -6.1%, +1.4% Btrfs , 3, +0.00%, -9.8%, +3.0% Btrfs , 5, +0.00%, +1.7%, +1.4% Btrfs , 7, +0.00%, -1.9%, +2.7% Btrfs , 9, +0.00%, -3.4%, +3.7% Btrfs , 15, +0.00%, -0.3%, +3.6% SquashFS , 1, +0.00%, N/A, +1.9% The major changes that impact the kernel use cases for each version are: v1.5.7: https://github.com/facebook/zstd/releases/tag/v1.5.7 * Add zstd_compress_sequences_and_literals() for use by Intel's QAT driver to implement Zstd compression acceleration in the kernel. * Fix an underflow bug in 32-bit builds that can cause data corruption when processing more than 4GB of data with a single `ZSTD_CCtx` object, when an input crosses the 4GB boundry. I don't believe this impacts any current kernel use cases, because the `ZSTD_CCtx` is typically reconstructed between compressions. * Levels 1-4 see 5-10% compression speed improvements for inputs smaller than 128KB. v1.5.6: https://github.com/facebook/zstd/releases/tag/v1.5.6 * Improved compression ratio for the highest compression levels. I don't expect these see much use however, due to their slow speeds. v1.5.5: https://github.com/facebook/zstd/releases/tag/v1.5.5 * Fix a rare corruption bug that can trigger on levels 13 and above. * Improve compression speed of levels 5-11 on incompressible data. v1.5.4: https://github.com/facebook/zstd/releases/tag/v1.5.4 * Improve copmression speed of levels 5-11 on ARM. * Improve dictionary compression speed. Signed-off-by: Nick Terrell <terrelln@fb.com>
108 lines
3.9 KiB
C
108 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
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/* ******************************************************************
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* debug
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* Part of FSE library
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* You can contact the author at :
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* - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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****************************************************************** */
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/*
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* The purpose of this header is to enable debug functions.
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* They regroup assert(), DEBUGLOG() and RAWLOG() for run-time,
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* and DEBUG_STATIC_ASSERT() for compile-time.
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*
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* By default, DEBUGLEVEL==0, which means run-time debug is disabled.
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*
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* Level 1 enables assert() only.
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* Starting level 2, traces can be generated and pushed to stderr.
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* The higher the level, the more verbose the traces.
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*
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* It's possible to dynamically adjust level using variable g_debug_level,
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* which is only declared if DEBUGLEVEL>=2,
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* and is a global variable, not multi-thread protected (use with care)
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*/
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#ifndef DEBUG_H_12987983217
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#define DEBUG_H_12987983217
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/* static assert is triggered at compile time, leaving no runtime artefact.
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* static assert only works with compile-time constants.
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* Also, this variant can only be used inside a function. */
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#define DEBUG_STATIC_ASSERT(c) (void)sizeof(char[(c) ? 1 : -1])
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/* DEBUGLEVEL is expected to be defined externally,
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* typically through compiler command line.
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* Value must be a number. */
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#ifndef DEBUGLEVEL
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# define DEBUGLEVEL 0
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#endif
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/* recommended values for DEBUGLEVEL :
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* 0 : release mode, no debug, all run-time checks disabled
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* 1 : enables assert() only, no display
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* 2 : reserved, for currently active debug path
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* 3 : events once per object lifetime (CCtx, CDict, etc.)
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* 4 : events once per frame
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* 5 : events once per block
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* 6 : events once per sequence (verbose)
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* 7+: events at every position (*very* verbose)
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*
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* It's generally inconvenient to output traces > 5.
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* In which case, it's possible to selectively trigger high verbosity levels
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* by modifying g_debug_level.
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*/
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#if (DEBUGLEVEL>=1)
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# define ZSTD_DEPS_NEED_ASSERT
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# include "zstd_deps.h"
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#else
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# ifndef assert /* assert may be already defined, due to prior #include <assert.h> */
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# define assert(condition) ((void)0) /* disable assert (default) */
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# endif
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#endif
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#if (DEBUGLEVEL>=2)
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# define ZSTD_DEPS_NEED_IO
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# include "zstd_deps.h"
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extern int g_debuglevel; /* the variable is only declared,
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it actually lives in debug.c,
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and is shared by the whole process.
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It's not thread-safe.
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It's useful when enabling very verbose levels
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on selective conditions (such as position in src) */
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# define RAWLOG(l, ...) \
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do { \
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if (l<=g_debuglevel) { \
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ZSTD_DEBUG_PRINT(__VA_ARGS__); \
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} \
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} while (0)
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#define STRINGIFY(x) #x
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#define TOSTRING(x) STRINGIFY(x)
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#define LINE_AS_STRING TOSTRING(__LINE__)
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# define DEBUGLOG(l, ...) \
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do { \
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if (l<=g_debuglevel) { \
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ZSTD_DEBUG_PRINT(__FILE__ ":" LINE_AS_STRING ": " __VA_ARGS__); \
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ZSTD_DEBUG_PRINT(" \n"); \
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} \
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} while (0)
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#else
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# define RAWLOG(l, ...) do { } while (0) /* disabled */
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# define DEBUGLOG(l, ...) do { } while (0) /* disabled */
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#endif
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#endif /* DEBUG_H_12987983217 */
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