rte_prefetch.h File Reference

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Functions
static void	rte_prefetch0 (const volatile void *p)
static void	rte_prefetch1 (const volatile void *p)
static void	rte_prefetch2 (const volatile void *p)
static void	rte_prefetch_non_temporal (const volatile void *p)

Detailed Description

Prefetch operations.

This file defines an API for prefetch macros / inline-functions, which are architecture-dependent. Prefetching occurs when a processor requests an instruction or data from memory to cache before it is actually needed, potentially speeding up the execution of the program.

Definition in file rte_prefetch.h.

Function Documentation

static void rte_prefetch0 ( const volatile void *  p )

inlinestatic

Prefetch a cache line into all cache levels.

Parameters

p	Address to prefetch

Examples:

examples/ip_fragmentation/main.c, examples/ip_reassembly/main.c, examples/ipsec-secgw/esp.c, examples/ipsec-secgw/ipsec-secgw.c, examples/ipsec-secgw/ipsec.c, examples/ipv4_multicast/main.c, examples/l2fwd-jobstats/main.c, examples/l2fwd-keepalive/main.c, examples/l2fwd/main.c, examples/l3fwd-acl/main.c, examples/l3fwd-power/main.c, examples/l3fwd-vf/main.c, examples/link_status_interrupt/main.c, examples/multi_process/l2fwd_fork/main.c, examples/performance-thread/l3fwd-thread/main.c, examples/tep_termination/main.c, and examples/vhost/virtio_net.c.

static void rte_prefetch1 ( const volatile void *  p )

inlinestatic

Prefetch a cache line into all cache levels except the 0th cache level.

Parameters

p	Address to prefetch

static void rte_prefetch2 ( const volatile void *  p )

inlinestatic

Prefetch a cache line into all cache levels except the 0th and 1th cache levels.

Parameters

p	Address to prefetch

static void rte_prefetch_non_temporal ( const volatile void *  p )

inlinestatic

Prefetch a cache line into all cache levels (non-temporal/transient version)

The non-temporal prefetch is intended as a prefetch hint that processor will use the prefetched data only once or short period, unlike the rte_prefetch0() function which imply that prefetched data to use repeatedly.

Parameters

p	Address to prefetch

Examples:

examples/distributor/main.c.