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xVml1coM4+Io4NhnrobVKRNg26xdN0aPcZI9oLmMMyFPR1p4i/zEBLwy0HV8d5sSf14+h9RMfyP sRM7f8ZiRGqopF3PziLkp2n1vjhXY2LjvubWArGwSVrUmdCY4lIkohW7+Gh6o/JO+8laxa0XIPF h6XUD8MBMLUgH3WHLfPNGAcV0gEGZDMUy/xJXbCFSVoxk6bkid1PIUi+rlx/T+Srkelm18OCl9p xOdTYJ2qXLMe8idulqNtcrJ3DLOCIWiAlPJWw7m4un5LsU3jsXU= X-Proofpoint-GUID: DeUxDUZPLtMC18Io6WDTKTTqXOgxQaPg X-Proofpoint-ORIG-GUID: DeUxDUZPLtMC18Io6WDTKTTqXOgxQaPg X-Authority-Analysis: v=2.4 cv=TtrrRTXh c=1 sm=1 tr=0 ts=69052736 b=1 cx=c_pps a=qoll8+KPOyaMroiJ2sR5sw==:117 a=qoll8+KPOyaMroiJ2sR5sw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RGnG5d-m14Jcu087PskA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 cc=ntf awl=host:12124 On 10/30/25 3:29 AM, Adam Li wrote: > Hi Joseph, > > On 10/18/2025 1:01 AM, Joseph Salisbury wrote: >> >> On 10/10/25 13:09, Peter Zijlstra wrote: >>> On Thu, Oct 09, 2025 at 09:04:40PM -0400, Joseph Salisbury wrote: >>> > [...] >>> diff --git a/kernel/sched/features.h b/kernel/sched/features.h >>> index 3c12d9f93331..5ded210701d0 100644 >>> --- a/kernel/sched/features.h >>> +++ b/kernel/sched/features.h >>> @@ -121,3 +121,8 @@ SCHED_FEAT(WA_BIAS, true) >>>   SCHED_FEAT(UTIL_EST, true) >>>     SCHED_FEAT(LATENCY_WARN, false) >>> + >>> +SCHED_FEAT(NI_TARGET, false) >>> +SCHED_FEAT(NI_SPARE, false) >>> +SCHED_FEAT(NI_RUNNABLE, false) >>> +SCHED_FEAT(NI_RANDOM, false) > [...] >> Thanks for providing the patch! >> >> I performed the same testing with this patch applied to a v6.12 based kernel.  The performance regression still exists and is slightly worse. >> The drgn stats are attached in a file named 'apache_drgn_log_NewidleRework_From_Peter.log'. >> >> > Just wondering, did you enable NI_TARGET feature? > It is default false in Peter's patch. > In my test 'NI_TARGET' can fix the regression caused by commit 155213a2aed4. > > Thanks, > -adam > Hi Adam, I did not try NI_TARGET.  I will try changing this in Peter's patch and re-test.  I'll post the results.