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howtos:hardware:bfq_io_scheduler [2014/10/30 02:25 (UTC)]
ricky_cardo [Sources]
howtos:hardware:bfq_io_scheduler [2015/07/13 11:59 (UTC)]
ricky_cardo [Use BFQ IO scheduler] Added kernel config note change
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-<!-- Add your text below. We strongly advise to start with a Headline (see button bar above). --> 
 ====== Use BFQ IO scheduler ====== ====== Use BFQ IO scheduler ======
  ​Budget Fair Queueing (BFQ) Storage-I/O Scheduler  ​Budget Fair Queueing (BFQ) Storage-I/O Scheduler
- * Why do I want BFQ?  -Seems to speed up disk based IO see the Source section for more info. + 
 +  * Why do I want BFQ?  -Seems to speed up disk based IO see the Source section for more info. \\ 
  ​[[http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​|http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​]]  ​[[http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​|http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​]]
  
- * First collect your existing kernel configuration. +  ​* First collect your existing kernel configuration. <code bash> 
-<code bash>​zcat /​proc/​config.gz > BFQ_CONFIG</​code>​+zcat /​proc/​config.gz > BFQ_CONFIG 
 +</​code>​
  
- * Next prepare your BFQ_CONFIG file(use vi or nano etc.) I like to locate "​CONFIG_DEFAULT_CFQ"​ section and make it look like the below. Be careful not to have duplicate lines. ​ I'm thinking there is a better way maybe someone could point it out. Basically add the two lines about BFQ change the existing CONFIG_DEFAULT_CFQ to "is not set" and add "​CONFIG_DEFAULT_BFQ=y'​ +  ​* Next prepare your BFQ_CONFIG file (use vi or nano etc)I like to locate "​CONFIG_DEFAULT_CFQ"​ section and make it look like below. Be careful not to have duplicate lines. ​ I'm thinking there is a better way maybe someone could point it out. Basically add the two lines about BFQ change the existing CONFIG_DEFAULT_CFQ to "is not set" and add "​CONFIG_DEFAULT_BFQ=y'​<code bash> 
-<code bash>​CONFIG_IOSCHED_BFQ=y+CONFIG_IOSCHED_BFQ=y
 CONFIG_CGROUP_BFQIO=y CONFIG_CGROUP_BFQIO=y
 # CONFIG_DEFAULT_DEADLINE is not set # CONFIG_DEFAULT_DEADLINE is not set
 # CONFIG_DEFAULT_CFQ is not set # CONFIG_DEFAULT_CFQ is not set
-CONFIG_DEFAULT_BFQ=y</​code>​+CONFIG_DEFAULT_BFQ=y 
 +</code
 +<​note>​You may not need to manually edit the BFQ_CONFIG. ​ I noticed make oldconfig will prompt you about the patches added. </note>
  
- * Now grab the code: (I'm using 3.14 in this sample as Slackware-current is currently using 3.14.18) +  ​* Now grab the code: (I'm using 3.14 in this sample as Slackware-current is currently using 3.14.18) <code bash> 
-<code bash>​VERSION=3.14.0-v7r6 # the version you want+VERSION=3.14.0-v7r6 # the version you want
 wget -nd --no-parent --level 1 -r -R "​*.html*"​ --reject $VERSION \ wget -nd --no-parent --level 1 -r -R "​*.html*"​ --reject $VERSION \
-    http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​patches/​$VERSION</​code>​+    http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​patches/​$VERSION 
 +</​code>​ 
 +     
 +  * Now copy your config file to /​usr/​src/​linux and rename it to ''​.config''​ \\ Example: (assuming the config you created above is in your home directory) <code bash> 
 +cp $HOME/​BFQ_CONFIG /​usr/​src/​linux/​.config 
 +</​code>​
     ​     ​
- * Next copy these files to /​usr/​src/​linux and then patch(You'll want 0001 to 0003) +  ​* Next copy these files to /​usr/​src/​linux and then patch (you'll want 0001 to 0003)<code bash>
-<code bash>+
 cp ./000* /​usr/​src/​linux;​cd /​usr/​src/​linux cp ./000* /​usr/​src/​linux;​cd /​usr/​src/​linux
 patch -p1 < 0001-block-cgroups-kconfig-build-bits-for-BFQ-v7r6-3.14.patch ​ patch -p1 < 0001-block-cgroups-kconfig-build-bits-for-BFQ-v7r6-3.14.patch ​
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 </​code>​ </​code>​
  
- * Now copy your config file to /​usr/​src/​linux and rename it .config 
-example: (assuming the config you created above is in your home directory) 
-<code bash> cp /​$HOME/​BFQ_CONFIG /​usr/​src/​linux.config</​code>​ 
  
- * cd /​usr/​src/​linux ;make oldconfig ;make -j4 && make modules_install 
  
- copy bzImage and System.map to boot folder +  ​cd /​usr/​src/​linux ;make oldconfig ;make -j4 && make modules_install
-  +
- * add lilo entry and update lilo.+
  
- More Details here [[howtos:​slackware_admin:​kernelbuilding|Building a Linux Kernel from Source]] +  ​copy bzImage and System.map to boot folder
- +
  
 +  * add lilo entry and update lilo.
  
 +  * More Details here [[howtos:​slackware_admin:​kernelbuilding|Building a Linux Kernel from Source]]
 + 
  
 ====== Sources ====== ====== Sources ======
-* Original source: [[http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​sources.php]] +  ​* Original source: [[http://​algo.ing.unimo.it/​people/​paolo/​disk_sched/​sources.php]] 
-<!-- Authors are allowed to give credit to themselves! --> +  * Originally written by [[wiki:​ricky_cardo:​xxx | ricky_cardo]] 
-* Originally written by [[wiki:​ricky_cardo:​xxx | ricky_cardo]] +  * Idea from rpi work by ponce adding bfq
-* Idea from rpi work by ponce adding bfq +
-<!-- * Contributions by [[wiki:​user:​yyy | User Y]] -->+
  
 <!-- Please do not modify anything below, except adding new tags.--> <!-- Please do not modify anything below, except adding new tags.-->
-<!-- You must remove the tag-word "​template"​ below before saving your new page --> + 
-{{tag>​howtos ​template}}+{{tag>​howtos}}

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