In this video I detail the necessary steps required to change the I/O Scheduler in the Linux Kernel at boot. Appreciate what I do? Grab me a coffee! http://goo.gl/wmHh4 Twitter: http://twitter.com/OhHeyItsLou Facebook: http://www.facebook.com/OhHeyItsLou Google+: gplus.to/OhHeyItsLou Blogger: http://ohheyitslou.blogspot.com Steam: IDIefiant
Views: 3930 OhHeyItsLou
Demo of the performance of the BFQ storage-I/O scheduler on a hard disk. This video has been obsoleted by the following one: http://youtu.be/ZeNbS0rzpoY which is about BFQ-v7r6, and where a more thorough comparison is carried out. In addition, you can find a new demo, with an SSD, here: http://youtu.be/1cjZeaCXIyM The home of BFQ is instead here: http://algogroup.unimore.it/people/paolo/disk_sched/
Views: 13806 Paolo Valente
A Solution to High Latencies Caused by I/O - Paolo Valente, Linaro The BFQ I/O scheduler has made its way into the Linux kernel, bringing high responsiveness, low latency for time-sensitive applications, and strong fairness. These improvements are particularly beneficial for embedded systems, given the slower speed and the higher latency of the storage devices of these systems. Yet, some year may pass before major OSes for embedded systems, notably Android, will run recent-enough versions of the Linux kernel to enjoy these improvements. In this presentation, we show the benefits to come (or already available in systems running recent kernels), and compare them with the current latency and unfairness problems of Linux-based embedded systems. In particular, we show these facts through demos and numbers for real hardware. About Paolo Valente Paolo Valente is an Assistant Professor of Computer Science at the University of Modena and Reggio Emilia, Italy, and a collaborator of the Linaro engineering organization. Paolo's main activities focus on scheduling algorithms for storage devices, transmission links and CPUs. In this respect, Paolo is the author of the last version of the BFQ I/O scheduler. BFQ entered the Linux kernel from 4.12, providing unprecedented low-latency and fairness guarantees. As for transmission links, Paolo is one of the authors of the QFQ packet scheduler, which has been in the Linux kernel until 3.7, after that it has been replaced by QFQ+, a faster variant defined and implemented by Paolo himself. Finally, Paolo has also defined and implemented other algorithms, part of which are now in FreeBSD, and has provided new theoretic results on multiprocessor scheduling. Paolo has given about forty talks, as an invited speaker or to present his scientific papers.
Views: 462 The Linux Foundation
A video demonstration showing the V-BFQ scheduler in action. V-BFQ aims to preserve low latency in interactive I/O workloads for virtualized systems, specifically in cases where the overall system is stressed both on the host and guest level. You can find more information at: http://www.virtualopensystems.com/en/products/virtual-bfq
Views: 410 Virtual Open Systems
This video shows the performance of BFQ-v7r5 on an SSD, in terms of responsiveness, latency for soft real-time applications and throughput, compared with CFQ, DEADLINE and NOOP. This video has been obsoleted by the following one: http://youtu.be/1cjZeaCXIyM which is about BFQ-v7r6, and where a more thorough comparison is carried out. For more information on BFQ: http://algogroup.unimore.it/people/paolo/disk_sched/
Views: 10761 Paolo Valente
Nothing much here just a demo of the level of optimization and responsiveness acheivable on a single core netbook(Asus 1018p, 2gb ddr2 667mhz ram, 750gb seagate 7200rpm HDD, 1.66Ghz atom N450 multithreaded single core CPU. Playing a movie, converting video, running my webcam, loading up chromium, some other programs all while running recordmydesktop. Still able to switch inbetween tasks nearly as if I was running Idle. I firmly believe that in most cases todays hardware Is more than capable of most computing tasks and then some when The software side has been optimized right. Thats a 3 year old netbook with low performance specs. Try achieving this on a mac or windows pc without a crash or severe lag... Oh and the same system boots between 20 and 25 seconds and also shuts down in under 10 every time(usually 5-7).
Views: 842 n15512
Asenkronizasyon nedir, CPU ve I/O bound process kavramı, CPU ve I/O Schedulerlar, quantum nedir, schedule edilmesine göre process türleri (interactive, batch, real-time), CPU scheduling policyler, elevatorlar (noop, deadline, cfq), I/O modelleri (senkron, asenkron ve bloklanan, bloklanmayan), kernelda zaman kavramı, HZ sabiti, jiffies ve BogoMIPS, NO_HZ opsiyonu, RTC üzerinden zaman bilgisine erişmek, işlemci bazında zaman ölçümü ve high resolution timers (CONFIG_HIGH_RES_TIMERS), ertelenmiş işlemler, busy waiting vs sleep waiting, uzun ertelemeler (cpu_relax, schedule ve timeoutlar), kısa ertelemeler (*delay ve *sleep fonksiyon ailesi), erteleme zamanına göre kullanılması önerilen yöntemler, üst ve alt katmanlar (top and bottom halves), tasklets ile workqueues ve bunların karşılaştırılması
This is my first tutorial video. I try to cover a basic Arch installation as succinctly as possible while going over encryption. Hopefully it's helpful! Some additional notes: 1) If you want to enable discard/TRIM functions on your encrypted/de-crypted partition, you will need to append ":allow-discards" to your cryptdevice line in your bootloader configuration file (ie: cryptdevice=/dev/sda2:root:allow-discards). Thereafter, add the appropriate mount options to your fstab file as they apply to the filesystem you've chosen, or just periodically run fstrim. 2) I use the Samsung 850 Pro and have had problems with the drive freezing and being reset while in use. I haven't seen this problem with the EVO line. If you are experiencing this problem, append "libata.force=noncq" to your kernel parameters in your bootloader's configuration file. 3) "Noop" is purportedly an ideal I/O scheduler for SSDs. If you don't want to take the time to compile a kernel, you can simply append "elevator=noop" to your kernel parameters. This is what my "append" line looks like, to explain the above: cryptdevice=/dev/sda2:root:allow-discards root=/dev/mapper/root rw quiet vga=895 elevator=noop libata.force=noncq
Views: 25355 MirrorMatter
Low desktop latency comparison on an old machine. Ladies and gentlemen, on your left stands the mighty Linux-4.11-BFQ kernel with default settings, our present best-soldier-for-the-job. On your right is the same system and kernel but tweaked; Can it does better than default? Elements of comparison. Follow a timeline, some detail about the hardware, the software, as well as a quick excerpt of the earlier stages of the game. 1. Timeline 0:00 System specs and (kernel) settings 0:50 Common daily multitasking test (Palemoon browser, session restore * and video streaming @ 02:15 ) 06:10 Closing applications * 06:55 720p HD video 07:30 1080p HD video * moment when the diff between the two contenders is most visible. 2. Hardware Circa-2002 PC: Athlon XP 1.5 Ghz with 512 MB RAM, 60 GB IDE hard drive, integrated GPU and a 1280x1024 px screen emulated as close to the physical one as possible with Qemu/KVM without SPICE. 3. Software LibreOffice 5.1.6, Evince PDF reader, MPlayer and Pale Moon 27.3, all chosen for their superior efficiency over many of their alternatives. OS is Bodhi Linux 4.2 (Ubuntu Xenial Xerus with Enlightenment/Moksha) that ships many of the bells and whistle of the better known desktop environments with a much lower resources footprint. Settings applied: none (video to the left); Swappiness, zswap and virtual memory (video to the right). 4. Earlier stages: how did we came here We did test many distributions on both emulated and physical oldies, e.g. Solus, Slitaz 3/5/rolling, Mageia, Lubuntu 12/14/16.04, eOS, Ubuntu Mate, Linux Mint, ConnochaetOS. Applications too. Then had them used for a while by our non-tech neighbors (still hopping our colleagues will find some little time for that ^^ ). Kept the most efficient e.g. « Testing the efficiency of six different browsers in real life on an Intel ATOM netbook » https://pic.al/uploads/19/62/hybcpinmc9s8oki1.gif We now are testing different settings on the most efficient OS for old computers we found so far. E.g. you can watch the same OS all defaults : « Test: Athlon XP 1.5GHz avec Bodhi Linux 4.2 (1280x1024) - défaut » https://youtu.be/__ui_MtIM78 Sharing your thoughts and own experience would be much appreciated. 5. Credits Videos : - Digital painting time-lapse : Lezard, created by David REVOY with Mypaint / Alchemy and Gimp on Linux. - trailer 1: The Idol / Ya tayr el tayer (original title), 2015, directed by Hany Abu-Assad - trailer 2: MISSION: IMPOSSIBLE vs MISSION: PAS POSSIBLE (original title), 2015, Rogue Nation - PARODIE prod. Julien ALLARD, author Vincent Scalera, with Natoo, Squeezie, Kemar et Mister V.
Views: 146 Tukoz Aki
BFQ (Budget Fair Queueing) is a production-quality, proportional-share disk scheduler with a relatively large user base. Part of its success is due to a set of simple heuristics that we added to the original algorithm about two years ago. The first heuristic enriches BFQ with one of the most desirable properties for a desktop or handheld system: responsiveness. A companion heuristic also reduces latency for soft real-time applications, such as audio or video players. As a result of our heuristics: 1) whatever the disk load is, interactive applications are virtually as responsive as if the disk was idle; 2) soft real-time applications enjoy lower latencies than CFQ; 3) a high throughput is achieved also in the presence of many concurrent requests and sudden increases of the workload. In this presentation I will first show these results through a demo of the performance of BFQ, as compared to CFQ. Then I will provide a few details both on how the low-latency heuristics of BFQ work, and on why they fit the BFQ service scheme. Paolo Valente: I am an assistant professor of Computer Science at the University of Modena and Reggio Emilia, Italy. The main focus of my research and development activity is the design and analysis of real-time and proportional-share scheduling algorithms for CPU, disk and network. Some of my main results follow. Budget Fair Queueing (BFQ): disk scheduler providing low response times for soft real-time and interactive applications, and at the same time a high throughput. Adopted by various Linux distributions and kernel variants, on both desktops and smartphones (estimated user base in the order of a few hundreds of thousands of users). Quick Fair Queueuing (QFQ): packet scheduler providing near-optim al fairness and packet-delay guarrantees, at very low computational cost. Upstreamed in Linux mainline up to 3.6 (then replaced by QFQ+, see below) and in FreeBSD: Quick Fair Queueuing Plus (QFQ+): faster version of QFQ, with execution time comparable to just a round robin. Replaced QFQ in Linux mainline from 3.8: Efficient Proportional-Share Process Scheduler (EPS2): process scheduler providing strong guarantees on job completion times and CPU-bandwidth distribution. Implemented under FreeBSD. Sito Internet: http://algogroup.unimore.it/people/paolo/ Slide disponibili su: https://bitbucket.org/gulp_pisa/repo_gulp/src/c260e985d17c10086fb2983407d71de5c6265982/LinuxDay/LinuxDay_2013/Improving_Applicat_on_Responsiveness_%20with_the_BFQ_IO_Scheduler/?at=master
Views: 151 Gulp Pisa
Session ID: SFO17-302 Session Name: BFQ, fairness and low latency in block I/O - The Two Towers - SFO17-302 Speaker: Track: Kernel ★ Session Summary ★ The BFQ I/O scheduler has been finally ported to blk-mq, and merged into the kernel (from 4.12). We start the first part of this presentation by recalling motivations and benefits of BFQ. Then we report the developments occurred since BFQ has been ported to blk-mq and upstreamed: fixes of important bugs, further throughput improvements for flash-based storage, public performance reports. In the second part of the presentation, we deal with the near future of BFQ, characterized by two great challenges. The first is to keep throughput high, while, at the same time, providing strong guarantees on fairness, bandwidth distribution and latency. The second great challenge is to achieve this combined goal with the low overhead imposed by modern devices. As a last part, we try to have a look at the future of BFQ, and of the latency issues that still affect many, if not most Linux-based systems --------------------------------------------------- ★ Resources ★ Event Page: http://connect.linaro.org/resource/sfo17/sfo17-302/ Presentation: https://www.slideshare.net/linaroorg/bfq-fairness-and-low-latency-in-block-io-the-two-towers-sfo17302-80182518 Video: --------------------------------------------------- ★ Event Details ★ Linaro Connect San Francisco 2017 (SFO17) 25-29 September 2017 Hyatt Regency San Francisco Airport --------------------------------------------------- Keyword: 'http://www.linaro.org' 'http://connect.linaro.org' --------------------------------------------------- Follow us on Social Media https://www.facebook.com/LinaroOrg https://twitter.com/linaroorg https://www.youtube.com/user/linaroorg?sub_confirmation=1 https://www.linkedin.com/company/1026961
Views: 505 LinaroOrg
About Kernel: "Speedy Kernel" the name itself says all story, Speedy Kernel is always based on latest Linux source code and comes with all needed new and governors and schedulers. Speedy Kernel comes in an unique AROMA package what allows you to choose your desired root management app and the desired modules installation. Basic concept of this tweaked kernel is to provide you possible best performance and battery life. Kernel Features: Based on Sony Latest Source Code: 6.1.1.B.1.54 / .56 / .75. Based on Linux Kernel Source Code: 3.0.75 (Latest to date). Aroma installer. SuperUser/SuperSu/Superuser(ClockworkMod) included. Compiled Using Linaro 4.8 CWM touch recovery with working extra features. New Sony make.believe bootsplash. Init.d Support. Frandom support Ads free eXperience included. SmartOverclock upto 1.15 GHz. ZRAM/SWAP support. Auto Install for Wi-Fi Modules. Good Battery Life with elf.3 support. Deep sleep mode. Pre rooted. LZO Kernel Image Compression. Governors: -Dynamic Interactive -LulzactiveQ -SmartassV2 -HotPlug -OndemandX -OndemandQ -Pegasusq -Adaptive -InteractiveX -Sakuractive -Lazy -Wheatley -Nightmare -MinMax -Interactive -Conservative -Ondemand -Userspace -Powersave -Performance IO Schedulers: -noop -deadline -cfq -sio -vr -zen NTFS Support CIFS Support Clean-Cache Support Xda thread: http://forum.xda-developers.com/showthread.php?t=2201151 Video By xda member dragxdk
Views: 6045 Diwaksh
Current developments in storage I/O as related to application responsiveness and latency. Paolo Valente This presentation is about two related topics: the current state of affairs of the BFQ (Budget Fair Queueing) I/O scheduler, and its relation with the ongoing work in the Linux kernel for keeping pace with the growing speed of modern, solid-state devices. As for BFQ, it seems to be on the right track to be merged into mainline, and replace the current default I/O scheduler. In this presentation we will also see BFQ in action with an SSD, and briefly discuss some of the inner workings of BFQ related to high-speed devices. Finally, as for the ongoing kernel work for achieving high I/O rates, we will highlight and question possible misconceptions about the ability of the current multi-queue I/O infrastructure to make I/O-related latencies negligible for applications.
Views: 268 Gulp Pisa
Salve galera. Compilação/Atualização do Kernel (vanilla-sources + genpatches com BFQ + kernel-headers) no Slackware-14.2_64-bits_multilib . https://www.kernel.org/ https://www.kernel.org/doc/Documentation/kbuild/headers_install.txt https://dev.gentoo.org/~mpagano/genpatches/ http://algo.ing.unimo.it/people/paolo/disk_sched/ OBS: Substitui/atualizei o kernel-headers do sistema; O arquivo "config" que usei está com adaptado para minha realidade; Usei o nome "genpatches" no Makefile e em outros lugares para identificação; Aqui gero initrd.gz: # mkinitrd -c -k 4.9.6-genpatches -m xfs -f xfs -r /dev/sda3 O comando acima tá configurado para minha realidade: -k 4.9.6-genpatches ( versão do kernel ) -m xfs -f xfs ( xfs o sistema de arquivos que uso) -r /dev/sda3 ( onde fica meu diretório raiz / ) gerar um novo grub.cfg para acrescentar as entradas das alterações: # grub-mkconfig -o /boot/grub/grub.cfg ### Essa parte usa-se apenas quando tem o arquivo grub.cfg personalizado; Para não sobrescrever ele com um novo , uso o exemplo abaixo: # cd /boot/grub # sed -i 's/4.9.5-genpatches/4.9.6-genpatches/g' grub.cfg - se for testar/usar essas instruções é por sua conta e risco; - adapte o guia pra sua realidade; - aqui uso o arquivo initrd.gz; - Se usa placa de video off-board tem que reinstalar o driver; - Antes de atualizar o kernel para a versão mais recente verifique se o driver de video ( Nvidia ou Amd ) é compativel; Pois muitas vezes é necessário alterar alguns arquivos dos drivers para que se tornem compatíveis com a versão do kernel atual; - De início use um arquivo ".config" completo: http://mirrors.slackware.com/slackware/slackware64-current/testing/source/linux-4.6-configs/ Não esqueça de rodar o comando : # make oldconfig Sempre que for mudar a versão do kernel, pois é ele que vai adicionar as novas funcionalidades do kernel novo ao arquivo ".config" ( após rodar o comando vai aparecer uma espécie de questionário); - Só realize os passos descritos aqui se tiver certeza do que está realizando, caso for testar instale o sistema em uma máquina virtual e pratique; - Não esqueça de configurar o arquivo "/etc/slackpkg/blacklist" para que o slackpkg não sobrescreva suas configurações personalizadas; - Adapte o guia pra sua realidade. Sobre GNU/Linux : - http://www.slackware.com/ - https://www.gentoo.org/ - http://www.funtoo.org/ - http://www.vivaolinux.com.br/ - https://edpsblog.wordpress.com/ Obrigado pela atenção , salve !!!
Views: 296 zezao capoeira
- DESCARGAS - ROM - Beta 4 (20181007) 👉Galaxy Tab 3 10.1 3G : santos103g http://tmearn.com/S9Osk 👉Galaxy Tab 3 10.1 Wifi : santos10wifi http://tmearn.com/wh6yuvW8 👉Galaxy Tab 3 10.1 LTE : santos10lte http://tmearn.com/C1ztc RECOVERY 👉Galaxy Tab 3 10.1 3G: GT-P5200 http://tmearn.com/TZZhJG4e 👉Galaxy Tab 3 10.1 Wifi: GT-P5210 http://tmearn.com/ejD5hw 👉Galaxy Tab 3 10.1 LTE: GT-P5220 http://tmearn.com/uEahKeDV Versiones anteriores aquí http://tmearn.com/WBmztzY GOOGLE APPS (GAPPS) 👉Seleccionar x86 y Android 7.1, recomiendo la versión PICO. http://tmearn.com/vwilez1Z Si no te funciona youtube instala la versión apk https://www.apkmirror.com/apk/google-inc/youtube/youtube-13-28-53-release/youtube-13-28-53-16-android-apk-download/ - CHANGELOG - Beta 4 (20181007) - Actualización Parche de seguridad 5 de Septiembre 2018 - Corrección muchas vulnerabilidades - Mejora parámetros SWAP - Añadidos 512MB en fichero de SWAP - INSTALACIÓN - Primera vez en esta rom Copiar ROM y GApps a SD o memoria interna Iniciar en modo recovery Copia de seguridad de EFS Limpiar, Limpieza avanzada, Dalvik Cache + System + Cache + Data Instalar ROM Instalar GApps Reiniciar sistema Nota: El primer inicio puede durar hasta 15 minutos Actualizar desde una versión anterior de LineageOS 14.1 Copiar ROM a SD o memoria interna Iniciar en modo recovery Instalar ROM Reiniciar sistema Opcional: Convertir filesystem a F2FS - QUE FUNCIONA - RIL (audio calls, data, sms, mms) 2D/3D acceleration HW video encoding/decoding Screen cast (Miracast/Wifi Display) MHL/HDMI Sound InfraRed Camera Wifi Bluetooth GPS Sensors SDCard, USB OTG Tethering (USB, Bluetooth, Wifi) Software DRM (Level 3, see below) - CARACTERÍSTICAS - Automatic brightness Change Color profile Change mDNIe scenario Enable/disable mDNIe negative mode Multiuser Enable/disable capacitive keys Change capacitive keys width Buttons backlight on screen touch or key touch only Smart cover lock/unlock F2FS and exFAT support Houdini (allows to install arm only apps on this x86 device) - Old version so some apps may crash Updated ZRAM support with LZ4 compression for maximum memory and speed Updated Xbox Controller driver Updated interactive CPU governor Available CPU governors: powersave, interactive, performance, ondemand Available I/O schedulers: noop, deadline, cfq, bfq (v7r8), fiops Available battery modes (power profiles): power save, balanced, performance 512MB swap file - QUE NO FUNCIONA - Some SDCards cause bootloop, in this case: remove SDCard and insert it again when device is booted Audio and camera need work Chromecast screencasting (other functions work) Hardware DRM (Level 1) SELinux (permissive) You tell me - ROOT - 👉Descarga addonsu-14.1-x86-signed.zip http://tmearn.com/h6yIvPM Copiar addonsu-14.1-x86-signed.zip a SDCard o memoria interna Iniciar en modo recovery Instalar addonsu-14.1-x86-signed.zip Reiniciar sistema Ir a Ajustes/Acerca de la tablet Pulsa 7 veces sobre número de compilación Ir a opciones de desarrollo Pulsa en acceso administrativo Seleccionar en aplicaciones sólo - UTILIDADES XIAOMI - Desbloquear Bootloader https://youtu.be/ErerTq4hdwY Instalar Recovery https://www.youtube.com/watch?v=Mymjp3sk7qw Desbrickear Xiaomi https://youtu.be/5CAUvS7PEOU Rootear (SuperSU) https://youtu.be/CaYuSr75AOo Rootear (Magisk) https://youtu.be/3jfpEkGX3Nw - REDMI 4A ROMS - Mokee OFICIAL (Oreo) Lineageos 15.1 (oreo) https://www.youtube.com/watch?v=r8x-tBVGYyc AICP 13.1 (oreo) https://www.youtube.com/watch?v=1y6fpbKTPv4 AOSP-CAF (NOUGAT) https://www.youtube.com/watch?v=JnKEUYNIo3I MIUI9 Global Oficial (NOUGAT) https://youtu.be/BrL_RQC6MbE Mokee (NOUGAT) https://www.youtube.com/watch?v=anG9TLNM1Q8 AOSPExtend (NOUGAT) https://forum.xda-developers.com/redmi-4a/development/rom-aospextended-rom-v4-6-redmi-4a-t3774449 Android One Rom (NOUGAT) https://www.youtube.com/watch?v=HvkzrDQg8vk Lineage OS 14.1 (NOUGAT) https://www.youtube.com/watch?v=K6TsZDtGDnE Resurrection Remix (NOUGAT) https://www.youtube.com/watch?v=B-lHghzLQ9E - REDMI NOTE 4 / 4X ROMS - Lineage OS 14.1 (NOUGAT) https://youtu.be/7CCukaRxkT8 Lineage OS 15.1 (OREO) https://www.youtube.com/watch?v=NT4SFlXINKs - GALAXY TAB 10.1 ROM - AOSP https://youtu.be/gbPKClXpCF8 - GALAXY TAB 3 10.1 ROM - Lineage OS (NOUGAT) https://youtu.be/uEOMPiAfAwQ
Views: 13736 Manuel Carmona
---------- LÉEME ANTES DE HACER NADA ---------- POR FAVOR SE QUE EL VIDEO ES LARGO XD Y HABLO MUCHO PERO SI LO VEIS COMPLETO Y LO HACEIS TODO BIEN NO TIENE QUE PASAR NADA MALO EN VUESTRO TELEFONO. ---------- SALUDOS ---------- Hola muy buenas a todos Yo soy Jonathan vidal magro y en este vídeo aprenderemos a usar la herramienta Stweaks. ---------- AYUDA ---------- Si el vídeo te gusto y te funciono no olvides en suscribirte para no perderte ningún vídeo de este canal tan precioso xd, dale a me gusta a los vídeos para que siga haciéndolos y sobretodo comparte el vídeo para que lo vea todo dios. ---------- Configuracion que sale en el video ---------- CPU GOVERNER: Performance - Interactive Battery - SmartMax, Ondemand Balance - Interactive, YankActive Gaming - Interactive ---------------------------------------------------------------- HOTPLUG: Performance - MPDescision, Intelliplug (Performance) Battery - Intelliplug (Conservative) Balance - Intelliplug (Balanced, Eco Performance, Eco Conservative) Enable TouchBoost ---------------------------------------------------------------- GPU GOVERNER: Overall - Simple ---------------------------------------------------------------- I/O SCHEDULERS: Performance - FIOPS, Noop Multitasking - BFQ, CFQ Battery - Noop, FIFO Balance - SIO, ZEN Internal Storage Read-Ahead: Stability - 128kB Balance - 1024kB Performance - 2048kB SD Card Read-Ahead: If Size of SDCard is (Card should be of good quality if not branded then use 128kB) Less than 8GB - 128kB 16 GB - 1024kB 32 GB or more - 2048kB ---------------------------------------------------------------- MISC: Android Logger - OFF zRAM - OFF (Only keep it on if you are heavy multi tasker or play heavy games) Swappiness: Smooth Operation - Between 0-50% (Ideal 20%) Heavy Gaming - Between 50-130% TCP Congestion - Westwood Dirty Background Ratio - 5% Dirty Ratio - 20% VFS Cache Pressure - 100% Dirty Expire Centisecs - 200% Dirty WriteBack Centisecs - 500%
Views: 2561 King Android
W swojej prezentacji Piotr Okupski (Stowarzyszenie Telewizji Kablowej “TV-SAT 364″) przedstawił jedno z najtańszych rozwiązań komercyjnych do ochrony przed atakami DDOS – Wanguard. Opowiedział także o wdrożeniu Remotely Triggered Blackhole Filtering (RTBF) przy pomocy protokołu BGP z przykładem polityki na routerze Juniper MX. Poza przykładami konfiguracji całego systemu opisał również ważne punkty tuningu systemu Linux, które są konieczne do osiągnięcia wysokiej wydajności systemu przy minimalnych nakładach finansowych. Prezentacja kierowana jest do małych oraz średnich operatorów. Slideshare: http://www.slideshare.net/proidea_conferences/wanguard-d-dosfinalpl
Views: 2282 PROIDEA Events