Which io scheduler to use?

The bottom line: Modern smartphones now use Noop as the default scheduler due to the fact that it works quite well with flash based storage. However older devices may experience slower performance when selected.

Which io scheduler is best for android?

That’s the best i can suggest. SIO > Noop > Deadline > VR > BFQ > CFQ, given all schedulers are tweaked and the storage used is a flash device….

Ondemand:
Conservative:
Interactivex:
Smartass:
SmartassV2:
Lagfree:
Brazilianwax:
SavagedZen:

What is deadline io scheduler?

Deadline Scheduler imposes deadlines on all I/O operations in order to prevent wanted requests. Two deadline read and write queues (basically sorted by their deadline) are maintained. For every new request, the scheduler selects which queue will serve for it.

What is io scheduler in android?

Android Android Kernel Optimization I/O Schedulers I/O schedulers decide how an upcoming I/O activity will be scheduled. The standard schedulers such as noop or cfq are performing very reasonably. I/O schedulers can be found in kernel_source/block.

What is the recommended I O scheduler for a database workload in Red Hat Enterprise Linux?

cfq scheduler
Red Hat Enterprise Linux as a virtualization host (Xen, KVM or VMware) When using RHEL as a host for virtualized guests, the default cfq scheduler is usually ideal. This scheduler performs well on nearly all workloads.

What is read ahead value?

Read-ahead speeds up file access by pre-fetching data and loading it into the page cache so that it can be available earlier in memory instead of from disk. Some workloads, such as those involving heavy streaming of sequential I/O, benefit from high read-ahead values.

Is Earliest deadline First preemptive?

In EDF, any executing task can be preempted if any other periodic instance with an earlier deadline is ready for execution and becomes active. Preemption is allowed in the Earliest Deadline First scheduling algorithm.

Which CPU governor is best for battery life?

So want good battery life and you can let go the performance factor down a few levels , use intelliactive as your CPU-Governor. It will give you performance + battery life. Also set IO-Scheduler as ‘NOOP’. Originally Answered: Which CPU Governor has minimum battery consumption on Android?

What is NOOP IO scheduler?

Noop. The Noop scheduler is a unique scheduler. Rather than prioritizing specific I/O operations, it simply places all I/O requests into a FIFO (First in, First Out) queue. While this scheduler does try to merge similar requests, that is the extent of the complexity of this scheduler.