![]() | |||||||||||||
Messages in this thread |
John Lee writes: > The usage rates for each task are estimated using Kalman > filter techniques, the estimates being similar to those > obtained by taking a running average over twice the filter > _response half life_ (see below). However, Kalman filter > values are cheaper to compute and don't require the > maintenance of historical usage data. Linux dearly needs this. Please separate out this part of the patch and send it in. Right now, Linux does not report the recent CPU usage of a process. The UNIX standard requires that "ps" report this; right now ps substitutes CPU usage over the whole lifetime of a process. Both per-task and per-process (tid and tgid) numbers are needed. Both percent and permill (1/1000) units get reported, so don't convert to integer percent. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
| Last update: 2005-03-22 14:01 [from the cache] ©2003-2008 | |||||||||||||