Rwsem_active_write_bias

Author: ilyj

August undefined, 2024

Webrwsem: Support optimistic spinning We have reached the point where our mutexes are quite fine tuned for a number of situations. This includes the use of heuristics and optimistic … WebWaiters on queue. * (ACTIVE_WRITE_BIAS + WAITING_BIAS) * * Note: Readers attempt to lock by adding ACTIVE_BIAS in down_read and checking * the count becomes more than 0 for successful lock acquisition, * i.e. the case where there are only readers or nobody has lock. * (1st and 2nd case above).

include/asm-s390/rwsem.h · …

Webstruct rwsem_waiter {struct list_head list; struct task_struct * task; unsigned int flags; #define RWSEM_WAITING_FOR_READ 0x00000001: #define … http://visa.lab.asu.edu/gitlab/fstrace/android-kernel-msm-hammerhead-3.4-marshmallow-mr3/blob/4350147a816b9c5b40fa59e4fa23f17490630b79/include/asm-s390/rwsem.h eiffel tower sandals

[PATCH] rwsem: add rwsem_is_contended

WebLinux kernel for Nexus 5 (hammerhead) Toggle navigation Toggle navigation pinning WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [GIT PULL] killable rwsems for v4.7 @ 2016-05-16 14:55 Ingo Molnar 2016-05-16 20:32 ` Linus Torvalds 0 siblings, 1 reply; 6+ messages in thread From: Ingo Molnar @ 2016-05-16 14:55 UTC (permalink / raw) To: Linus Torvalds Cc: linux-kernel, Peter Zijlstra, Thomas Gleixner, Andrew Morton Linus, … Webrwsem.h implementation. In your use case (read lock is known to be held), checking for sem->count < 0 would be sufficient to indicate a writer is queued (or getting onto the queue). In the general case, some architectures have the various values set up so that RWSEM_WAITING_BIAS != RWSEM_ACTIVE_WRITE_BIAS - for these eiffel tower sains

[PATCH] rwsem: steal writing sem for better performance

WebReturns a plot where variables are equidistantly spaced in a circle. Arrows indicate the directionality of the relationship. The arrow width indicates the strength of the effect … WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH v2] locking/rwsem: Optimize write lock by reducing operations in slowpath @ 2016-05-16 … follow ordersWebSeed length used by the read aligner. Providing the correct value is important for RSEM. If RSEM runs Bowtie, it uses this value for Bowtie's seed length parameter. eiffel tower sayings

"WebRSPD: Read Start Position Distribution. x-axis is bin number, y-axis is the probability of each bin. RSPD can be used as an indicator of 3’ bias. Quality score vs. observed quality given a … " - Rwsem_active_write_bias

Rwsem_active_write_bias

Web*PATCH] rwsem: steal writing sem for better performance @ 2013-02-05 13:11 Alex Shi 2013-02-05 14:58 ` Ingo Molnar ` (2 more replies) 0 siblings, 3 replies; 8+ messages in thread From: Alex Shi @ 2013-02-05 13:11 UTC (permalink / raw) To: mingo, torvalds; +Cc: paul.gortmaker, alex.shi, linux-kernel Commit 5a50508 change to rwsem from mutex, that … Webrwsem code harder to be optimized. To make rwsem more sane, a new locking scheme similar to the one in qrwlock is now being used. The count is now a 32-bit atomic value in …

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WebMay 14, 2014 · rwsem: Support optimistic spinning We have reached the point where our mutexes are quite fine tuned for a number of situations. This includes the use of … WebRSEM is a software package for estimating gene and isoform expression levels from RNA-Seq data. The RSEM package provides an user-friendly interface, supports threads for …

Web# define RWSEM_WAITING_FOR_WRITE 0x00000002}; /* * handle the lock release when processes blocked on it that can now run * - if we come here from up_xxxx(), then: ... (sem, &waiter, -RWSEM_ACTIVE_BIAS); return sem;} /* * handle waking up a waiter on the semaphore * - up_read/up_write has decremented the active part of count if we come … WebWaiters on queue. * (ACTIVE_WRITE_BIAS + WAITING_BIAS) * * Note: Readers attempt to lock by adding ACTIVE_BIAS in down_read and checking * the count becomes more than …

WebSpotify's Linux kernel for Debian-based systems. Contribute to spotify/linux development by creating an account on GitHub. http://visa.lab.asu.edu/gitlab/fstrace/android-kernel-msm-hammerhead-3.4-marshmallow-mr3/blob/9a054fbac8f8441f48896b855a9e11c13e0c3dc8/include/asm-ia64/rwsem.h

WebSigned-off-by: Robert P. J. Day Signed-off-by: Tony Luck

WebOn Thu, Jun 5, 2014 at 3:22 AM, Peter Zijlstra wrote: > On Wed, Jun 04, 2014 at 04:56:50PM -0400, Andev wrote: >> On Wed, Jun 4, 2014 at 4:38 ... follow option trading strategyWebFrom: Michal Hocko x86 implementation of __down_write is using inline asm to optimize the code flow. This however requires that it has go over an additional hop follow orders for metWebSubject: [PATCH] x86/locking/rwsem: Cleanup ____down_write() Move the RWSEM_ACTIVE_WRITE_BIAS out of the inline asm to reduce the number of arguments. Also, make it an input argument only (why it was an output operand, I still don't know...). For better readability, use symbolic names for the arguments and move the linebreak … eiffel tower scaffoldingWeb* The value of ACTIVE_BIAS supports up to 65535 active processes. * * This should be totally fair - if anything is waiting, a process that wants a * lock will go to the back of the … follow orders synonymWebMar 13, 2024 · RWSEM_UNLOCKED_VALUE, RWSEM_ACTIVE_WRITE_BIAS); return tmp = = RWSEM_UNLOCKED_VALUE;} /* * downgrade write lock to read lock */ static inline void … follow orgWebRe: [PATCH 2/2] sh, rwsem: drop superfluous arch specific implementation From: Peter Zijlstra Date: Wed Apr 06 2016 - 05:27:21 EST Next message: Michal Hocko: "Re: [PATCH 10/11] mm, oom: protect !costly allocations some more" Previous message: Michal Hocko: "Re: [PATCH 09/11] mm, compaction: Abstract compaction feedback to helpers" In reply … eiffel tower salt and pepper shakersWebDec 4, 2006 · Remove one level of indirection (kernel/rwsem.c -> lib/rwsem.c), and give a bit of a cleanup (eg remove the fastcall junk) to make the code a bit easier to read. Out-of-line … follow orders meme