CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY: Low-latency Dispatch of Deferred SMTC IPIs

General informations

The Linux kernel configuration item CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY:

• prompt: Low-latency Dispatch of Deferred SMTC IPIs
• type: bool
• depends on: CONFIG_MIPS_MT_SMTC && ! CONFIG_PREEMPT
• defined in arch/mips/Kconfig
• found in Linux kernels: 2.6.20–2.6.26

Help text

SMTC pseudo-interrupts between TCs are deferred and queued if the target TC is interrupt-inhibited (IXMT). In the first SMTC prototypes, these queued IPIs were serviced on return to user mode, or on entry into the kernel idle loop. The INSTANT_REPLAY option dispatches them as part of local_irq_restore() processing, which adds runtime overhead (hence the option to turn it off), but ensures that IPIs are handled promptly even under heavy I/O interrupt load.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

Automatic links from Google (and ads)

Custom Search

Popular queries: