PLMC : a Page LRU-level Memory Controller for CKRM/RG This is not a real/complete memory controller yet, just a poor/light prototype : - to explain what is guarantee into a generic workload management and why limit only is not enough to provide this feature, - coded with very minimal changes into the kernel and based on the existing CKRM/RG framework, - and try to clarify/correct what is IMHO not efficient in the current CKRM/RG memory controller implementation.
The objective is to control the memory usage of an application or a group of apps. The control is based on the number of pages currently in use by each groups but limited to pages present into the "LRU list" (then some kernel pages are out of this control). Guarantee and limit are the 2 expected (and independent) mechanisms. Nothing new compared to the current CKRM/RG memory controller, only the realization differs : a light implementation introduces a lot of (acceptable ?) limitations. Only the guarantee is available with this patch. Limit is in the TODO list. The first goal is to have an acceptance regarding : - the accounting of pages for a group, - the changes into the kernel code to implement guarantee. Since the CKRM/RG framework (interface/configfs) already exists then I prefer to reuse it and not try to reinvent the wheel : Applies against 2.6.18 + res_group_f0.8_single_2618 The CKRM/RG code is available at : http://sourceforge.net/project/showfiles.php?group_id=85838 Each patch can be installed and compiled individually, with CONFIG_RES_GROUPS_MEM_RC turned on/off. How to compile & install : in the .config file : CONFIG_RES_GROUPS=y CONFIG_RES_GROUPS_NUMTASKS=y CONFIG_RES_GROUPS_MEM_RC=y make bzImage/modules/modules_install/reboot How to use : see the CKRM/RG documents (I can give some help). Signed-off-by: Patrick Le Dot <[EMAIL PROTECTED]> --- +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Patrick Le Dot mailto: [EMAIL PROTECTED]@bull.net Centre UNIX de BULL SAS Phone : +33 4 76 29 73 20 1, Rue de Provence BP 208 Fax : +33 4 76 29 76 00 38130 ECHIROLLES Cedex FRANCE Bull, Architect of an Open World TM www.bull.com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
