V-4.1 Single Priority Array O(1) CPU Scheduler Evaluation

Version 4.1 of the various single priority array scheduler patches for 2.6.7 and 2.6.8-rc4 kernels are now available for evaluation.

This version contains a fix for a bug causing excessive promotion and an update of the staircase scheduler code to match Con's 7.I version.

1. [ZAPHOD] My proposed replacement scheduler which offers runtime selectable choice between a priority based or entitlement based O(1) scheduler with active/expired arrays replaced by a single array and an O(1) promotion mechanism plus scheduling statistics with new simplified interactive bonus mechanism and throughput bonus mechanism:

2.6.7 <http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_zaphod_FULL-v4.1?download> and/or <http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_zaphod-v4.0-to-v4.1?download>
2.6.8-rc4 <http://prdownloads.sourceforge.net/cpuse/patch-2.6.8-rc4-spa_zaphod_FULL-v4.1?download>

2. [SC] Slightly modified version of Con Kolivas's staircase O(1) (version 7.I) scheduler with active/expired arrays replaced by a single array and an O(1)promotion mechanism:

2.6.7<http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_sc_FULL-v4.1?download> and/or <http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_sc-v4.0-to-v4.1?download>
2.6.8-rc4 <http://prdownloads.sourceforge.net/cpuse/patch-2.6.8-rc4-spa_sc_FULL-v4.1?download>

3. [HYDRA] Runtime selection between staircase, priority based and entitlement based O(1) schedulers:

2.6.7 <http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_hydra_FULL-v4.1?download> and/or <http://prdownloads.sourceforge.net/cpuse/patch-2.6.7-spa_hydra-v4.0-to-v4.1?download>
2.6.8-rc3 <http://prdownloads.sourceforge.net/cpuse/patch-2.6.8-rc4-spa_hydra_FULL-v4.1?download>

Other schedulers are also available from
<https://sourceforge.net/projects/cpuse/>

Peter Williams                                   [email protected]

"Learning, n. The kind of ignorance distinguishing the studious."
 -- Ambrose Bierce