search for: lowlatency

Displaying 20 results from an estimated 25 matches for "lowlatency".

2016 Oct 21
1
[PATCH/RFC 0/5] cpu_relax: introduce yield, remove lowlatency
...the same, but on >> some architectures cpu_relax can add some latency. For example on s390 >> cpu_relax gives up the time slice to the hypervisor. On power cpu_relax >> tries to give some of the CPU to the neighbor threads. To reduce the >> latency another variant cpu_relax_lowlatency was introduced. Before this >> is used in more and more places, lets revert the logic of provide a new >> function cpu_relax_yield that can spend some time and for s390 yields >> the guest CPU. > > Sparc64, fwiw, behaves similarly to powerpc. As sparc currently defines cpu...
2016 Oct 21
1
[PATCH/RFC 0/5] cpu_relax: introduce yield, remove lowlatency
...the same, but on >> some architectures cpu_relax can add some latency. For example on s390 >> cpu_relax gives up the time slice to the hypervisor. On power cpu_relax >> tries to give some of the CPU to the neighbor threads. To reduce the >> latency another variant cpu_relax_lowlatency was introduced. Before this >> is used in more and more places, lets revert the logic of provide a new >> function cpu_relax_yield that can spend some time and for s390 yields >> the guest CPU. > > Sparc64, fwiw, behaves similarly to powerpc. As sparc currently defines cpu...
2004 Dec 16
1
Low-latency kernel?
While trying to apply the low-latency kernel patches to our RHv9 Linux 2.4.20-31.9, the patches would not apply. In comparing one of the first patch files (lowlatency.h) to that already on the system, it would appear the low latency patches were already applied by RH. The original RHv9 file (lowlatency.h) even had the patch author's name/credit in it. Does anyone know whether RH made an effort to incorporate the patches, and if so, about what kernel versio...
2013 Apr 30
13
WARNING: at fs/btrfs/free-space-cache.c:921 __btrfs_write_out_cache+0x6b9/0x9a0 [btrfs]()
Hello On my HP Compaq dc5800 with Ubuntu 13.04 and their 3.8.0-19-lowlatency kernel, I''ve got quite some kernel traces in the syslog. You can find them below or at http://pastebin.com/bLXPBX67 (to avoid line breaks…). These kernel traces all begin with: WARNING: at fs/btrfs/free-space-cache.c:921 __btrfs_write_out_cache+0x6b9/0x9a0 [btrfs]() Most of the time, i...
2017 Aug 15
2
Dualhead issue
Hi, my primary monitor is a LCD HDMI2 and the secondary monitor is a CRT VGA1. The CRT monitor is only turned on on demand, but always connected by VGA. The BIOS is shown on both monitors, but the syslinux menu only on the CRT, as long as the CRT is connected by VGA. Even if it's turned off, the syslinux menu isn't shown on the LCD connected by HDMI. [root at archlinux ~]# pacman -Q
2017 Aug 16
2
Dualhead issue
...LABEL Arch MENU LABEL ^Arch Linux LINUX ../vmlinuz-linux APPEND root=LABEL=archlinux ro INITRD ../initramfs-linux.img MENU SEPARATOR MENU SEPARATOR LABEL Other Menu MENU LABEL Other Linux MENU DISABLE MENU SEPARATOR LABEL Moonstudio MENU LABEL Ubuntu X ^Moon Studio lowlatency LINUX /.boot/ubuntu_moonstudio/boot/vmlinuz-lowlatency APPEND root=LABEL=moonstudio ro INITRD /.boot/ubuntu_moonstudio/boot/initrd.img-lowlatency LABEL Light MENU LABEL Ubuntu ^Q LightScribe Rt LINUX /.boot/ubuntu_q/boot/vmlinuz-3.6.5-rt14 APPEND root=LABEL=q ro nomodeset...
2008 Aug 13
1
X11 drive is missing; wine 0.9.53
Hello to everyone, I 'm trying to install wine 0.9.53 on my ubuntu hardy to get Guitar rig 2 right with lowlatency kernel. So i think this could be a right version.. I installed it with a .deb version ( i took it on this site) after i satisfied a dependency ( i think LIBLIP2: but i'm not sure...). But when i try to launch it from terminal this is the response: Application tried to create a window, but no...
2016 Oct 24
0
[PATCH 2/5] stop_machine: yield CPU during stop machine
...90: reintroduce diag 44 calls for cpu_relax()"), but the only place where we noticed the missing yield was in the stop_machine code. I would assume that we might find some other places where this makes sense in the future, but I expect that we have much less places for yield than we need for lowlatency. PS: We do something similar for our arch implementation for spinlocks, but there we use the directed yield as we know which CPU holds the lock. > > As a step to removing cpu_yield_lowlatency this series is nice so I > have no objection. But "general" kernel coders still hav...
2016 Oct 21
3
[PATCH 2/5] stop_machine: yield CPU during stop machine
On Fri, Oct 21, 2016 at 01:58:55PM +0200, Christian Borntraeger wrote: > stop_machine can take a very long time if the hypervisor does > overcommitment for guest CPUs. When waiting for "the one", lets > give up our CPU by using the new cpu_relax_yield. This seems something that would apply to most other virt stuff. Lets Cc a few more lists for that. > Signed-off-by:
2016 Oct 21
3
[PATCH 2/5] stop_machine: yield CPU during stop machine
On Fri, Oct 21, 2016 at 01:58:55PM +0200, Christian Borntraeger wrote: > stop_machine can take a very long time if the hypervisor does > overcommitment for guest CPUs. When waiting for "the one", lets > give up our CPU by using the new cpu_relax_yield. This seems something that would apply to most other virt stuff. Lets Cc a few more lists for that. > Signed-off-by:
2013 Jun 17
5
Filesystem "somewhat" destroyed - need help for recovery/fixing
Hello I think, I somewhat destroyed my btrfs filesystem on my Ubuntu 13.04 kernel 3.8.0-25-lowlatency system. It got destroyed, because the system was hanging for some other reason and I had to remove power... When I try to mount my filesystem (there''s only one, with a few subfilesystems), the system crashes. Also btrfsck dies; always like this: a@ask-home:~$ sudo /btrfs-progs.dev/bin/...
2016 Oct 25
7
[GIT PULL v2 0/5] cpu_relax: drop lowlatency, introduce yield
...87ff2eab5c994949e69: Linux 4.9-rc2 (2016-10-23 17:10:14 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux.git tags/cpurelax for you to fetch changes up to dcc37f9044436438360402714b7544a8e8779b07: processor.h: remove cpu_relax_lowlatency (2016-10-25 09:49:57 +0200) ---------------------------------------------------------------- cpu_relax: drop lowlatency, introduce yield For spinning loops people do often use barrier() or cpu_relax(). For most architectures cpu_relax and barrier are the same, but on some architectures cpu_relax...
2016 Oct 25
7
[GIT PULL v2 0/5] cpu_relax: drop lowlatency, introduce yield
...87ff2eab5c994949e69: Linux 4.9-rc2 (2016-10-23 17:10:14 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux.git tags/cpurelax for you to fetch changes up to dcc37f9044436438360402714b7544a8e8779b07: processor.h: remove cpu_relax_lowlatency (2016-10-25 09:49:57 +0200) ---------------------------------------------------------------- cpu_relax: drop lowlatency, introduce yield For spinning loops people do often use barrier() or cpu_relax(). For most architectures cpu_relax and barrier are the same, but on some architectures cpu_relax...
2016 Oct 22
1
[PATCH 2/5] stop_machine: yield CPU during stop machine
...t; - cpu_relax(); > > + cpu_relax_yield(); > > if (msdata->state != curstate) { > > curstate = msdata->state; > > switch (curstate) { > > -- > > 2.5.5 > > This is the only caller of cpu_relax_yield()? As a step to removing cpu_yield_lowlatency this series is nice so I have no objection. But "general" kernel coders still have basically no chance of using this properly. I wonder what can be done about that. I've got that spin_do/while series I'll rebase on top of this, but a spin_yield variant of them is of no more help...
2015 Nov 24
0
Problems with public key
I am using Ubuntu Trusty: Linux hugo-P35-DS3L 3.13.0-68-lowlatency #111-Ubuntu SMP PREEMPT Fri Nov 6 19:08:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-a...
2003 Jul 27
0
data=journal with large external journals
...ounted noatime,data=journal. This configuration was chosen because users are uploading images to the server and I thought that putting writes on an external volume would improve read efficiency. I'm running kernel 2.4.21 with Andrea Arcangeli's rc8aa1 patch set (mostly for the elevator-lowlatency patches which fix a problem with huge amounts of cpu being used by kswapd). This patch set also includes the akpm jbd_refile_buffer patch to transaction.c. The symptoms are that the system chugs along for hours until the load suddenly shoots through the ceiling (500+) as the buffer utilization...
2013 Jan 15
1
Bug#698237: xen requires openssl to build
...formation: Debian Release: wheezy/sid APT prefers precise-updates APT policy: (500, 'precise-updates'), (500, 'precise-security'), (500, 'precise-proposed'), (500, 'precise'), (100, 'precise-backports') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-36-lowlatency (SMP w/8 CPU cores; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash
2004 Dec 09
1
Changing NICE value for * will it help?
By default asterisk (on my system) runs with NICE value "0" like most of the programs. Will the performance improve if I assign NICE value of let say -5 or -10 to asterisk? To my understanding it should as the priority will be higher than most other programs (it might even solve some echo problem). Am I right? How to start asterisk with priority let say -5? If I start the main process
2014 Dec 29
22
[Bug 87830] New: I got bright noise screen (static) like on TV after boot.
...xx.txt I can switch to all tty* and somehow except tty7 (where I get that noise screen) In tty1 it looks like resolution is about 1280x1024 (native res. for my LCD). On tty7 I have gnome. Can't do anything there. Screen doesn't change at all. I have NVidia GTX550Ti. Linux thepc 3.13.0-43-lowlatency #72+7.0trisquel2 SMP PREEMPT Mon Dec 15 03:41:11 UTC 2014 i686 athlon i686 GNU/Linux ps -ax under root returned: 171 ? S 0:00 [irq/43-nouveau] 1702 tty1 S+ 0:00 grep --color=auto nouveau dmesg: http://pastebin.pw/arzeht dmesg is also attached -- You are receiving this mail...
2012 Feb 20
4
Workarounds for Splinter Cell: Conviction
...wine just crashes with the exception as tested by other people. I don't know how else to share my info with other people eager to play this nice game, so I guess the forum would be a good starting point. My PC is a Phenom II 940 with Ubuntu 11.10 amd64, with 2 additional PPA's installed: lowlatency-kernel PPA and the latest binary nvidia drivers PPA (295.20 as of this writing). Okay ... here's a rundown on how to get this game to work really well with Wine (tested with 1.4-rc3) .. 1. Install the raw input patch. (http://dl.dropbox.com/u/6901628/raw3.patch) in wine source dir, do: # pa...