e983caf81d
We don't want sched_nr_migrate to be too high, as that would impact real-time latencies as the load balancing process for SCHED_OTHER disallows IRQ interrupts. Instead of making this a constant value, let's use an amount that relates to the CPU performance of a device. Consider that a device with a very weak 4 core processor needs to load balance 32 tasks from the most busy-but-idle CPU. That balancing would take significantly longer than a device with 8 cores. On the contrary view, that same 8 core device balancing 32 tasks would have no issues with SCHED_OTHER performance, however, real-time tasks would suffer more jitter than is necessary. Let's only balance as many tasks as there are CPUs in a device for optimal SCHED_OTHER performance and SCHED_FIFO / SCHED_RR latency. |
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| .. | ||
| ems | ||
| autogroup.c | ||
| autogroup.h | ||
| clock.c | ||
| completion.c | ||
| core.c | ||
| cpuacct.c | ||
| cpudeadline.c | ||
| cpudeadline.h | ||
| cpufreq.c | ||
| cpufreq_schedutil.c | ||
| cpupri.c | ||
| cpupri.h | ||
| cputime.c | ||
| deadline.c | ||
| debug.c | ||
| fair.c | ||
| features.h | ||
| idle.c | ||
| isolation.c | ||
| loadavg.c | ||
| Makefile | ||
| membarrier.c | ||
| pelt.c | ||
| pelt.h | ||
| psi.c | ||
| rt.c | ||
| sched-pelt.h | ||
| sched.h | ||
| sec_mpam.c | ||
| sec_mpam_cpbm.h | ||
| sec_mpam_sysfs.c | ||
| sec_mpam_sysfs.h | ||
| smp.h | ||
| stats.c | ||
| stats.h | ||
| stop_task.c | ||
| swait.c | ||
| topology.c | ||
| wait.c | ||
| wait_bit.c | ||