1 From 3432c140c9c51e671a4d58bb428d5852426add1f Mon Sep 17 00:00:00 2001
2 From: "Todd Foggoa (tfoggoa)" <tfoggoa@cisco.com>
3 Date: Wed, 3 Feb 2016 08:35:27 -0800
4 Subject: [PATCH 5/6] Allow applications to override rte_delay_us()
6 Some applications may wish to define their own implentation of
7 usec delay other than the existing blocking one. The default
8 behavior remains unchanged.
10 Signed-off-by: Todd Foggoa (tfoggoa) <tfoggoa@cisco.com>
12 lib/librte_eal/common/eal_common_timer.c | 12 ++++++++++++
13 1 file changed, 12 insertions(+)
15 diff --git a/lib/librte_eal/common/eal_common_timer.c b/lib/librte_eal/common/eal_common_timer.c
16 index c4227cd..cc26b91 100644
17 --- a/lib/librte_eal/common/eal_common_timer.c
18 +++ b/lib/librte_eal/common/eal_common_timer.c
20 /* The frequency of the RDTSC timer resolution */
21 static uint64_t eal_tsc_resolution_hz;
23 +/* Allow an override of the rte_delay_us function */
24 +int rte_delay_us_override (unsigned us) __attribute__((weak));
27 +rte_delay_us_override(__attribute__((unused)) unsigned us)
33 rte_delay_us(unsigned us)
35 + if (rte_delay_us_override(us))
38 const uint64_t start = rte_get_timer_cycles();
39 const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6;
40 while ((rte_get_timer_cycles() - start) < ticks)