Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-22 Thread Tim Chen
On Fri, 2015-01-16 at 09:46 -0800, Tim Chen wrote: > On Thu, 2015-01-15 at 20:58 -0500, Steven Rostedt wrote: > > > > > Please add a comment here that says something like: > > > > /* > > * Don't bother moving it if the destination CPU is > > * not running a

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-22 Thread Tim Chen
On Fri, 2015-01-16 at 09:46 -0800, Tim Chen wrote: On Thu, 2015-01-15 at 20:58 -0500, Steven Rostedt wrote: Please add a comment here that says something like: /* * Don't bother moving it if the destination CPU is * not running a lower

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-16 Thread Tim Chen
On Thu, 2015-01-15 at 20:58 -0500, Steven Rostedt wrote: > > Please add a comment here that says something like: > > /* >* Don't bother moving it if the destination CPU is >* not running a lower priority task. >*/ > Okay. Updated

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-16 Thread Tim Chen
On Thu, 2015-01-15 at 20:58 -0500, Steven Rostedt wrote: Please add a comment here that says something like: /* * Don't bother moving it if the destination CPU is * not running a lower priority task. */ Okay. Updated in patch

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-15 Thread Steven Rostedt
On Tue, 06 Jan 2015 11:01:51 -0800 Tim Chen wrote: > Didn't get any response for this patch probably due to the holidays. > Reposting it as we will like to get it merged to help our database > workload. > > This patch added checks that prevent futile attempts to move rt tasks > to cpu with

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-15 Thread Tim Chen
On Tue, 2015-01-06 at 20:30 +0100, Peter Zijlstra wrote: > On Tue, Jan 06, 2015 at 11:01:51AM -0800, Tim Chen wrote: > > Didn't get any response for this patch probably due to the holidays. > > Reposting it as we will like to get it merged to help our database > > workload. > > > > This patch

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-15 Thread Tim Chen
On Tue, 2015-01-06 at 20:30 +0100, Peter Zijlstra wrote: On Tue, Jan 06, 2015 at 11:01:51AM -0800, Tim Chen wrote: Didn't get any response for this patch probably due to the holidays. Reposting it as we will like to get it merged to help our database workload. This patch added checks

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-15 Thread Steven Rostedt
On Tue, 06 Jan 2015 11:01:51 -0800 Tim Chen tim.c.c...@linux.intel.com wrote: Didn't get any response for this patch probably due to the holidays. Reposting it as we will like to get it merged to help our database workload. This patch added checks that prevent futile attempts to move rt

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-06 Thread Peter Zijlstra
On Tue, Jan 06, 2015 at 11:01:51AM -0800, Tim Chen wrote: > Didn't get any response for this patch probably due to the holidays. > Reposting it as we will like to get it merged to help our database > workload. > > This patch added checks that prevent futile attempts to move rt tasks > to cpu with

[PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-06 Thread Tim Chen
Didn't get any response for this patch probably due to the holidays. Reposting it as we will like to get it merged to help our database workload. This patch added checks that prevent futile attempts to move rt tasks to cpu with active tasks of equal or higher priority. This reduces run queue

[PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-06 Thread Tim Chen
Didn't get any response for this patch probably due to the holidays. Reposting it as we will like to get it merged to help our database workload. This patch added checks that prevent futile attempts to move rt tasks to cpu with active tasks of equal or higher priority. This reduces run queue

Re: [PATCH] Repost sched-rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-06 Thread Peter Zijlstra
On Tue, Jan 06, 2015 at 11:01:51AM -0800, Tim Chen wrote: Didn't get any response for this patch probably due to the holidays. Reposting it as we will like to get it merged to help our database workload. This patch added checks that prevent futile attempts to move rt tasks to cpu with