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/Linux-v6.1/tools/power/cpupower/man/
Dcpupower-set.11 .TH CPUPOWER\-SET "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-set \- Set processor power related kernel or hardware configurations
6 .B cpupower set [ \-b VAL ]
11 registers affecting processor power saving policies.
15 described in the cpupower(1) manpage in the \-\-cpu option section. Whether an
24 \-\-perf-bias, \-b
27 its policy for the relative importance of performance versus energy savings to
30 The range of valid numbers is 0-15, where 0 is maximum
31 performance and 15 is maximum energy efficiency.
33 The processor uses this information in model-specific ways
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/Linux-v6.1/Documentation/ABI/testing/
Dsysfs-class-scsi_host7 Storage Control Unit embeds up to two 4-port controllers in
23 stack for a performance advantage when possible. A value of
28 controller wide, affecting all configured logical drives on the
34 Contact: linux-ide@vger.kernel.org
43 performance due to increased latency when coming out of lower
47 Tell the controller to have performance be a priority over power
60 a) It does not use host-initiated slumber mode, but it does
61 allow device-initiated slumber
68 Contact: linux-ide@vger.kernel.org
79 protocol that is being used by the driver (for eg. LED, SAF-TE,
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/Linux-v6.1/Documentation/filesystems/nfs/
Dknfsd-stats.rst5 :Authors: Greg Banks <gnb@sgi.com> - 26 Mar 2009
13 program from the nfs-utils distribution provides a helpful command-line
48 packets-arrived
58 However this is a more accurate and less workload-dependent measure
62 sockets-enqueued
68 network-facing work to be done but it couldn't be done immediately,
70 rate of change for this counter is zero; significantly non-zero
71 values may indicate a performance limitation.
74 pool for the NFS workload (the workload is thread-limited), in which
76 performance of the NFS workload.
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/Linux-v6.1/Documentation/filesystems/
Dceph.rst1 .. SPDX-License-Identifier: GPL-2.0
8 performance, reliability, and scalability.
15 * N-way replication of data across storage nodes
32 re-replicated in a distributed fashion by the storage nodes themselves
37 in-memory cache above the file namespace that is extremely scalable,
39 and can tolerate arbitrary (well, non-Byzantine) node failures. The
41 storage to significantly improve performance for common workloads. In
61 files and bytes. That is, a 'getfattr -d foo' on any directory in the
72 setfattr -n ceph.quota.max_bytes -v 100000000 /some/dir
73 getfattr -n ceph.quota.max_bytes /some/dir
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Dntfs.rst1 .. SPDX-License-Identifier: GPL-2.0
10 - Overview
11 - Web site
12 - Features
13 - Supported mount options
14 - Known bugs and (mis-)features
15 - Using NTFS volume and stripe sets
16 - The Device-Mapper driver
17 - The Software RAID / MD driver
18 - Limitations when using the MD driver
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/Linux-v6.1/Documentation/devicetree/bindings/memory-controllers/
Dnvidia,tegra20-emc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra20-emc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Dmitry Osipenko <digetx@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com>
12 - Thierry Reding <thierry.reding@gmail.com>
15 The External Memory Controller (EMC) interfaces with the off-chip SDRAM to
17 various performance-affecting settings beyond the obvious SDRAM configuration
23 const: nvidia,tegra20-emc
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Dnvidia,tegra30-emc.yaml1 # SPDX-License-Identifier: (GPL-2.0)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra30-emc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Dmitry Osipenko <digetx@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com>
12 - Thierry Reding <thierry.reding@gmail.com>
15 The EMC interfaces with the off-chip SDRAM to service the request stream
16 sent from Memory Controller. The EMC also has various performance-affecting
23 const: nvidia,tegra30-emc
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/Linux-v6.1/Documentation/admin-guide/pm/
Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
5 .. |cpufreq| replace:: :doc:`CPU Performance Scaling <cpufreq>`
27 CPU idle time management is an energy-efficiency feature concerned about using
31 ------------
37 software as individual single-core processors. In other words, a CPU is an
46 Second, if the processor is multi-core, each core in it is able to follow at
61 Finally, each core in a multi-core processor may be able to follow more than one
66 multiple individual single-core "processors", referred to as *hardware threads*
67 (or hyper-threads specifically on Intel hardware), that each can follow one
78 ---------
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/Linux-v6.1/LICENSES/dual/
DCC-BY-4.01 Valid-License-Identifier: CC-BY-4.0
2 SPDX-URL: https://spdx.org/licenses/CC-BY-4.0
3 Usage-Guide:
6 with a GPL2 compatible license using "OR", as CC-BY-4.0 texts processed by
12 SPDX-License-Identifier: CC-BY-4.0
13 License-Text:
21 Creative Commons public licenses does not create a lawyer-client or
23 information available on an "as-is" basis. Creative Commons gives no
47 material not subject to the license. This includes other CC-
55 the licensor's permission is not necessary for any reason--for
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/Linux-v6.1/Documentation/admin-guide/
Dbcache.rst11 This is the git repository of bcache-tools:
12 https://git.kernel.org/pub/scm/linux/kernel/git/colyli/bcache-tools.git/
17 It's designed around the performance characteristics of SSDs - it only allocates
25 great lengths to protect your data - it reliably handles unclean shutdown. (It
29 Writeback caching can use most of the cache for buffering writes - writing
36 average is above the cutoff it will skip all IO from that task - instead of
47 You'll need bcache util from the bcache-tools repository. Both the cache device
50 bcache make -B /dev/sdb
51 bcache make -C /dev/sdc
53 `bcache make` has the ability to format multiple devices at the same time - if
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/Linux-v6.1/tools/perf/Documentation/
Dperf-report.txt1 perf-report(1)
5 ----
6 perf-report - Read perf.data (created by perf record) and display the profile
9 --------
11 'perf report' [-i <file> | --input=file]
14 -----------
15 This command displays the performance counter profile information recorded
19 -------
20 -i::
21 --input=::
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/Linux-v6.1/crypto/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
162 bool "Disable run-time self tests"
165 Disable run-time self tests that normally take place at
169 bool "Enable extra run-time crypto self tests"
172 Enable extra run-time self tests of registered crypto algorithms,
241 menu "Public-key cryptography"
244 tristate "RSA (Rivest-Shamir-Adleman)"
250 RSA (Rivest-Shamir-Adleman) public key algorithm (RFC8017)
253 tristate "DH (Diffie-Hellman)"
257 DH (Diffie-Hellman) key exchange algorithm
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/Linux-v6.1/Documentation/admin-guide/sysctl/
Dvm.rst13 ------------------------------------------------------------------------------
27 - admin_reserve_kbytes
28 - compact_memory
29 - compaction_proactiveness
30 - compact_unevictable_allowed
31 - dirty_background_bytes
32 - dirty_background_ratio
33 - dirty_bytes
34 - dirty_expire_centisecs
35 - dirty_ratio
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/Linux-v6.1/Documentation/admin-guide/hw-vuln/
Dspectre.rst1 .. SPDX-License-Identifier: GPL-2.0
14 -------------------
17 high performance processors, since most modern high speed processors
22 - Intel Core, Atom, Pentium, and Xeon processors
24 - AMD Phenom, EPYC, and Zen processors
26 - IBM POWER and zSeries processors
28 - Higher end ARM processors
30 - Apple CPUs
32 - Higher end MIPS CPUs
34 - Likely most other high performance CPUs. Contact your CPU vendor for details.
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/Linux-v6.1/Documentation/RCU/
Dstallwarn.rst1 .. SPDX-License-Identifier: GPL-2.0
9 options that can be used to fine-tune the detector's operation. Finally,
20 - A CPU looping in an RCU read-side critical section.
22 - A CPU looping with interrupts disabled.
24 - A CPU looping with preemption disabled.
26 - A CPU looping with bottom halves disabled.
28 - For !CONFIG_PREEMPTION kernels, a CPU looping anywhere in the kernel
33 - Booting Linux using a console connection that is too slow to
34 keep up with the boot-time console-message rate. For example,
36 with boot-time message rates, and will frequently result in
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/Linux-v6.1/arch/arm/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
144 The ARM series is a line of low-power-consumption RISC chip designs
146 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
147 manufactured, but legacy ARM-based PC hardware remains popular in
158 supported in LLD until version 14. The combined range is -/+ 256 MiB,
251 Patch phys-to-virt and virt-to-phys translation functions at
255 This can only be used with non-XIP MMU kernels where the base
302 bool "MMU-based Paged Memory Management Support"
305 Select if you want MMU-based virtualised addressing space
373 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
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/Linux-v6.1/scripts/
Dspelling.txt83 afecting||affecting
1097 peformance||performance
1102 perfomance||performance
1613 vicefersa||vice-versa
/Linux-v6.1/drivers/net/wireless/broadcom/brcm80211/brcmsmac/
Dmain.h14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
48 * Usage example, e.g. a three-bit field (bits 4-6):
52 * regval = R_REG(osh, &regs->regfoo);
55 * W_REG(osh, &regs->regfoo, regval);
58 (((unsigned)1 << (width)) - 1)
67 /* max # supported core revisions (0 .. MAXCOREREV - 1) */
76 #define BRCMS_SHORTSLOT_AUTO -1 /* Driver will manage Shortslot setting */
91 #define TXFID_QUEUE_MASK 0x0007 /* Bits 0-2 */
92 #define TXFID_SEQ_MASK 0x7FE0 /* Bits 5-15 */
145 ((uint)((wlc)->band->bandunit ? BAND_2G_INDEX : BAND_5G_INDEX))
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/Linux-v6.1/lib/
DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
50 int "Default console loglevel (1-15)"
60 Note: This does not affect the log level of un-prefixed printk()
65 int "quiet console loglevel (1-15)"
76 int "Default message log level (1-7)"
82 This was hard-coded to KERN_WARNING since at least 2.6.10 but folks
118 enabled/disabled based on various levels of scope - per source file,
158 nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
162 nullarbor:~ # echo -n 'file svcsock.c +p' >
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/Linux-v6.1/arch/arm64/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
234 ARM 64-bit (AArch64) Linux support.
244 depends on $(cc-option,-fpatchable-function-entry=2)
277 # VA_BITS - PAGE_SHIFT - 3
356 def_bool !$(as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n)
383 …bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is acce…
388 erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or
391 If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors
397 data cache clean-and-invalidate.
405 …bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to th…
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/Linux-v6.1/include/drm/display/
Ddrm_dp_mst_helper.h19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
52 * struct drm_dp_mst_port - MST port
56 * @mcs: message capability status - DP 1.2 spec. Protected by
58 * @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by
75 * @passthrough_aux: parent aux to which DSC pass-through requests should be
76 * sent, only set if DSC pass-through is possible.
138 * @cached_edid: for DP logical ports - make tiling work by ensuring
144 * audio-capable.
155 /* sideband msg header - not bit struct */
181 * struct drm_dp_mst_branch - MST branch device.
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/Linux-v6.1/arch/x86/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
27 # Options that are inherently 64-bit kernel only:
53 # ported to 32-bit as well. )
134 # Word-size accesses may read uninitialized data past the trailing \0
302 default "elf32-i386" if X86_32
303 default "elf64-x86-64" if X86_64
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/Linux-v6.1/drivers/net/ethernet/sfc/
Defx_common.c1 // SPDX-License-Identifier: GPL-2.0-only
38 * On Falcon-based NICs, this will:
39 * - Check the on-board hardware monitor;
40 * - Poll the link state and reconfigure the hardware as necessary.
41 * On Siena-based NICs for power systems with EEH support, this will give EEH a
109 * queued onto this work queue. This is not a per-nic work queue, because
119 return -ENOMEM; in efx_create_reset_workqueue()
127 queue_work(reset_workqueue, &efx->reset_work); in efx_queue_reset_work()
132 cancel_work_sync(&efx->reset_work); in efx_flush_reset_workqueue()
143 /* We assume that efx->type->reconfigure_mac will always try to sync RX
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/Linux-v6.1/drivers/net/ethernet/sfc/siena/
Defx_common.c1 // SPDX-License-Identifier: GPL-2.0-only
37 * On Falcon-based NICs, this will:
38 * - Check the on-board hardware monitor;
39 * - Poll the link state and reconfigure the hardware as necessary.
40 * On Siena-based NICs for power systems with EEH support, this will give EEH a
108 * queued onto this work queue. This is not a per-nic work queue, because
118 return -ENOMEM; in efx_siena_create_reset_workqueue()
126 queue_work(reset_workqueue, &efx->reset_work); in efx_siena_queue_reset_work()
131 cancel_work_sync(&efx->reset_work); in efx_siena_flush_reset_workqueue()
142 /* We assume that efx->type->reconfigure_mac will always try to sync RX
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/Linux-v6.1/drivers/cpufreq/
Dcpufreq.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
9 * Oct 2005 - Ashok Raj <ashok.raj@intel.com>
11 * Feb 2006 - Jacob Shin <jacob.shin@amd.com>
12 * Fix handling for CPU hotplug -- affected CPUs
54 * The "cpufreq driver" - the arch- or hardware-dependent low
73 return cpufreq_driver->target_index || cpufreq_driver->target; in has_target()
108 return !!(cpufreq_driver->flags & CPUFREQ_HAVE_GOVERNOR_PER_POLICY); in have_governor_per_policy()
117 return &policy->kobj; in get_governor_parent_kobj()
141 idle_time = cur_wall_time - busy_time; in get_cpu_idle_time_jiffy()
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