| /freebsd/contrib/jemalloc/ |
| H A D | TUNING.md | 8 by a few percent, or make favorable trade-offs.
42 operating system, and therefore provides a fairly straightforward trade-off
47 Suggested: tune the values based on the desired trade-offs.
52 However high arena count may also increase overall memory fragmentation,
53 since arenas manage memory independently. When high degree of parallelism
71 * High resource consumption application, prioritizing CPU utilization:
77 * High resource consumption application, prioritizing memory usage:
90 * Extremely conservative -- minimize memory usage at all costs, only suitable when
91 allocation activity is very rare:
118 case for performance purpose is to utilize huge pages -- for example,
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| /freebsd/sys/contrib/device-tree/Bindings/rtc/ |
| H A D | rtc-palmas.txt | 4 - compatible:
5 - "ti,palmas-rtc" for palma series of the RTC controller
6 - interrupts: Interrupt number of RTC submodule on device.
10 - ti,backup-battery-chargeable: The Palmas series device like TPS65913 or
12 battery is removed or in very low power state. The backup battery
13 can be chargeable or non-chargeable. This flag will tells whether
16 - ti,backup-battery-charge-high-current: Enable high current charging in
18 The high current will be > 100uA. Absence of this property will
25 compatible = "ti,palmas-rtc";
26 interrupt-parent = <&palmas>;
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|
| /freebsd/contrib/llvm-project/llvm/include/llvm/Passes/ |
| H A D | OptimizationLevel.h | 1 //===-------- LLVM-provided High-Level Optimization levels -*- C++ -*------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
10 /// This header enumerates the LLVM-provided high-level optimization levels.
13 //===----------------------------------------------------------------------===//
47 /// in a very good development mode where the compiled code will be
49 /// possible, we would like to produce efficient-to-execute code, but not
87 /// reasonably. This does not preclude very substantial constant factor
101 /// A very specialized mode that will optimize for code size at any and all
107 /// slow, but very small, code.
|
| /freebsd/usr.bin/mkuzip/ |
| H A D | mkuzip.8 | 1 .\"-
2 .\" Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
48 class will be able to decompress the resulting image at run-time.
56 .Bl -enum
69 .Bl -tag -width indent
86 In the very high compression
88 settings, it does not offer quite as high a compression ratio as
90 However, its decompression speed does not suffer at high compression
105 .Va 0-9 .
114 .Va 1-9 .
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|
| /freebsd/contrib/llvm-project/lld/docs/ |
| H A D | NewLLD.rst | 5 ---------------------------
23 ------------
29 We believe that these high-level design choices achieved a right balance
36 The linkers share the same design but share very little code.
39 to abstract the differences wouldn't be worth its complexity and run-time
45 One of the most important things in archiving high performance is to
47 Therefore, the high-level design matters more than local optimizations.
48 Since we are trying to create a high-performance linker,
49 it is very important to keep the design as efficient as possible.
71 - If the linker visits an object file, the linker links object files to the
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|
| /freebsd/share/doc/papers/timecounter/ |
| H A D | timecounter.ms | 5 .\" ----------------------------------------------------------------------------
6 .\" "THE BEER-WARE LICENSE" (Revision 42):
9 .\" this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
10 .\" ----------------------------------------------------------------------------
16 .A "Poul-Henning Kamp" "The FreeBSD Project"
18 The FreeBSD timecounters are an architecture-independent implementation
21 multiplication to canonical timescales based on micro- or nano-seconds
23 synchronisation. Timecounters are implemented using lock-less
24 stable-storage based primitives which scale efficiently in SMP
42 But there is no doubt that it happened very early in the development
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|
| /freebsd/sys/contrib/device-tree/Bindings/mtd/ |
| H A D | lpc32xx-mlc.txt | 4 - compatible: "nxp,lpc3220-mlc"
5 - reg: Address and size of the controller
6 - interrupts: The NAND interrupt specification
7 - gpios: GPIO specification for NAND write protect
9 The following required properties are very controller specific. See the LPC32xx
13 - nxp,tcea_delay: TCEA_DELAY
14 - nxp,busy_delay: BUSY_DELAY
15 - nxp,nand_ta: NAND_TA
16 - nxp,rd_high: RD_HIGH
17 - nxp,rd_low: RD_LOW
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|
| /freebsd/sys/contrib/zstd/ |
| H A D | CHANGELOG | 2 perf: Regain Minimal memset()-ing During Reuse of Compression Contexts (@Cyan4973, #2969)
9 perf: slightly faster high speed modes (strategies fast & dfast), by @felixhandte
12 perf: faster mid-level compression speed in presence of highly repetitive patterns, by @senhuang42
13 perf: minor compression ratio improvements for small data at high levels, by @cyan4973
16 perf: on-demand reduced ZSTD_DCtx state size, using build macro ZSTD_DECODER_INTERNAL_BUFFER, at a …
20 build: improved meson unofficial build, by @eli-schwartz
22 …rt advanced parameters information when compressing in very verbose mode (``-vv`), by @Svetlitski-…
25 api: Various functions promoted from experimental to stable API: (#2579-2581, @senhuang42)
39 api: ZSTDMT_NBWORKERS_MAX reduced to 64 for 32-bit environments (@Cyan4973)
41 perf: Block splitter to improve compression ratio, enabled by default for high compression levels (…
[all …]
|
| /freebsd/contrib/sendmail/src/ |
| H A D | TUNING | 1 # Copyright (c) 2001-2003, 2014 Proofpoint, Inc. and its suppliers.
8 # $Id: TUNING,v 1.22 2013-11-22 20:51:54 ca Exp $
34 * Mailing Lists and Large Aliases (1-n Mailing)
35 * 1-1 Mass Mailing
36 * High Volume Mail
42 is non-trivial to combine low latency (fast delivery of incoming
43 mail) with high overall throughput.
50 -----------------------------------------------
58 disk is exceeded, which is true for almost every high-volume
70 -----------------------------------------------
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|
| /freebsd/crypto/openssl/crypto/perlasm/ |
| H A D | README.md | 31 &HB(reg); High byte for a register
66 So a very simple version of this function could be coded as
105 The above example is very very unoptimised but gives an idea of how
127 &cbc("BF_cbc_encrypt","BF_encrypt","BF_encrypt",1,4,5,3,-1,-1);
129 &cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",0,4,5,3,5,-1);
|
| /freebsd/share/doc/psd/25.xdrrfc/ |
| H A D | xdr.rfc.ms | 2 .\" Must use -- tbl -- with this one
34 diverse machines as the Sun Workstation, VAX, IBM-PC, and Cray.
55 suggests that bytes be encoded in "little-endian" style [2], or least
63 32 bits) of data. The bytes are numbered 0 through n-1. The bytes
78 \f(CW+--------+--------+...+--------+--------+...+--------+
79 | byte 0 | byte 1 |...|byte n-1| 0 |...| 0 |
80 +--------+--------+...+--------+--------+...+--------+
81 |<-----------n bytes---------->|<------r bytes------>|
82 |<-----------n+r (where (n+r) mod 4 = 0)>----------->|\fP
97 fixed-length sequences of data. "n", "m" and "r" denote integers.
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|
| /freebsd/share/man/man4/ |
| H A D | ow_temp.4 | 1 .\"-
2 .\" SPDX-License-Identifier: BSD-2-Clause
31 .Nd Dallas Semiconductor 1-Wire Temperature sensor
37 module supports many of the 1-Wire temperature sensors.
47 .Bl -column "DS18S20" "Econo 1-Wire Digital Thermometer" -compact
48 .It DS1820 Ta 1-Wire Digital Thermometer
49 .It DS18S20 Ta High-Precision 1-Wire Digital Thermometer
50 .It DS18B20 Ta Programmable Resolution 1-Wire Digital Thermometer
51 .It DS1822 Ta Econo 1-Wire Digital Thermometer
52 .It DS1825 Ta Programmable Resolution 1-Wire Digital Thermometer with 4-bit ID
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|
| /freebsd/crypto/openssl/doc/designs/ddd/ |
| H A D | WINDOWS.md | 1 Windows-related issues
16 structure which embeds a fixed-length array of socket handles. This is necessary
18 contiguously like FDs. As such, Windows select() is actually very similar to
21 Neither select() nor poll() are, of course, high performance polling options.
22 Windows does not provide anything like epoll or kqueue. For high performance
27 is that IOCPs are a higher-level interface; it is easy to build an IOCP-like
29 polling-like interface on top of IOCPs.
34 just to write a poll-based implementation of an I/O reactor and an IOCP-based
41 actually more similar to a high-level asynchronous I/O library such as libuv or
46 - ddd-01-conn-blocking: Blocking example, use of IOCP is not applicable.
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|
| /freebsd/share/doc/psd/02.implement/ |
| H A D | implement | 4 .\" Copyright (C) Caldera International Inc. 2001-2002. All rights reserved.
40 .EH 'PSD:2-%''UNIX Implementation'
41 .OH 'UNIX Implementation''PSD:2-%'
55 \&\\$3\s-1\\$1\\s0\&\\$2
69 .AU "MH 2C-523" 2394
75 This paper describes in high-level terms the
120 but have that way be the least-common divisor
125 It is a soap-box platform on
159 from a read-only text segment,
165 from shared-text segments.
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|
| /freebsd/sys/contrib/device-tree/Bindings/clock/ |
| H A D | idt,versaclock5.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
16 - 5P49V5923:
17 0 -- OUT0_SEL_I2CB
18 1 -- OUT1
19 2 -- OUT2
21 - 5P49V5933:
22 0 -- OUT0_SEL_I2CB
23 1 -- OUT1
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|
| /freebsd/share/doc/psd/21.ipc/ |
| H A D | 1.t | 52 while providing an upward-compatible interface.
57 UNIX has previously been very weak in the area of interprocess
61 experimental). Unfortunately, pipes are very restrictive
75 Processes may rendezvous through a UNIX file system-like
88 This document provides a high-level description
93 Section 2 introduces the IPC-related system calls and the basic model
|
| /freebsd/sys/contrib/device-tree/Bindings/iio/light/ |
| H A D | amstaos,tsl2591.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Joe Sandom <joe.g.sandom@gmail.com>
13 AMS/TAOS TSL2591 is a very-high sensitivity
14 light-to-digital converter that transforms light intensity into a digital
32 - compatible
33 - reg
38 - |
39 #include <dt-bindings/interrupt-controller/irq.h>
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|
| /freebsd/sys/kern/ |
| H A D | subr_unit.c | 1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2004 Poul-Henning Kamp
31 * These functions implement a mixed run-length/bitmap management of unit
32 * number spaces in a very memory efficient manner.
36 * A return value of -1 signals that no more unit numbers are available.
51 * sleep so the free_unr() function does not come in a pre-locked variant.
55 * Memory usage is a very complex function of the exact allocation
56 * pattern, but always very compact:
57 * * For the very typical case where a single unbroken run of unit
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|
| /freebsd/sys/contrib/dev/iwlwifi/fw/api/ |
| H A D | rs.h | 1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright (C) 2012-2014, 2018-2022, 2024-2025 Intel Corporation
14 * enum iwl_tlc_mng_cfg_flags - options for TLC config flags
38 * enum iwl_tlc_mng_cfg_cw - channel width options
54 * enum iwl_tlc_mng_cfg_chains - possible chains
64 * enum iwl_tlc_mng_cfg_mode - supported modes
84 * enum iwl_tlc_mng_ht_rates - HT/VHT/HE rates
122 * enum IWL_TLC_MCS_PER_BW - mcs index per BW
123 * @IWL_TLC_MCS_PER_BW_80: mcs for bw - 20Hhz, 40Hhz, 80Hhz
124 * @IWL_TLC_MCS_PER_BW_160: mcs for bw - 160Mhz
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|
| /freebsd/sys/contrib/device-tree/Bindings/dma/ |
| H A D | st,stm32-mdma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/st,stm32-mdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 MDMA is a general-purpose direct memory access controller capable of
13 described in the dma.txt file, using a five-cell specifier for each channel:
19 0x2: High
20 0x3: Very high
22 -bit 0-1: Source increment mode
26 -bit 2-3: Destination increment mode
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|
| H A D | st,stm32-dma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/st,stm32-dma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 DMA is a general-purpose direct memory access controller capable of
13 described in the dma.txt file, using a four-cell specifier for each
19 -bit 9: Peripheral Increment Address
22 -bit 10: Memory Increment Address
25 -bit 15: Peripheral Increment Offset Size
27 0x1: offset size is fixed to 4 (32-bit alignment)
[all …]
|
| /freebsd/sys/contrib/device-tree/Bindings/dma/stm32/ |
| H A D | st,stm32-mdma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/stm32/st,stm32-mdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 MDMA is a general-purpose direct memory access controller capable of
13 described in the dma.txt file, using a five-cell specifier for each channel:
19 0x2: High
20 0x3: Very high
22 -bit 0-1: Source increment mode
26 -bit 2-3: Destination increment mode
[all …]
|
| H A D | st,stm32-dma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/stm32/st,stm32-dma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 DMA is a general-purpose direct memory access controller capable of
13 described in the dma.txt file, using a four-cell specifier for each
19 -bit 9: Peripheral Increment Address
22 -bit 10: Memory Increment Address
25 -bit 15: Peripheral Increment Offset Size
27 0x1: offset size is fixed to 4 (32-bit alignment)
[all …]
|
| /freebsd/sys/contrib/zstd/lib/common/ |
| H A D | debug.h | 7 * - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
9 * This source code is licensed under both the BSD-style license (found in the
12 * You may select, at your option, one of the above-listed licenses.
18 * They regroup assert(), DEBUGLOG() and RAWLOG() for run-time,
19 * and DEBUG_STATIC_ASSERT() for compile-time.
21 * By default, DEBUGLEVEL==0, which means run-time debug is disabled.
29 * and is a global variable, not multi-thread protected (use with care)
41 * static assert only works with compile-time constants.
43 #define DEBUG_STATIC_ASSERT(c) (void)sizeof(char[(c) ? 1 : -1])
55 * 0 : release mode, no debug, all run-time checks disabled
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|
| /freebsd/share/doc/smm/18.net/ |
| H A D | e.t | 40 is kept in page-sized units on page-aligned
57 data from the network is very difficult.
60 one or more headers used by the high level protocols.
90 The processing of the trailer protocol is very
|