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From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
To: dev@dpdk.org
Cc: thomas@monjalon.net,
Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Tue, 2 May 2017 00:42:07 +0530
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Subject: [dpdk-dev] [PATCH] eal: optimize timer routines
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Since DPDK has only two timer sources,
Avoid &eal_timer_source memory read and followed
by the switch case statement when
RTE_LIBEAL_USE_HPET is not defined.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
lib/librte_eal/common/include/generic/rte_cycles.h | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/lib/librte_eal/common/include/generic/rte_cycles.h b/lib/librte_eal/common/include/generic/rte_cycles.h
index 00103ca9f..2f3dea06e 100644
--- a/lib/librte_eal/common/include/generic/rte_cycles.h
+++ b/lib/librte_eal/common/include/generic/rte_cycles.h
@@ -150,15 +150,17 @@ int rte_eal_hpet_init(int make_default);
static inline uint64_t
rte_get_timer_cycles(void)
{
+#ifdef RTE_LIBEAL_USE_HPET
switch(eal_timer_source) {
case EAL_TIMER_TSC:
return rte_get_tsc_cycles();
case EAL_TIMER_HPET:
-#ifdef RTE_LIBEAL_USE_HPET
return rte_get_hpet_cycles();
-#endif
default: rte_panic("Invalid timer source specified\n");
}
+#else
+ return rte_get_tsc_cycles();
+#endif
}
/**
@@ -170,15 +172,17 @@ rte_get_timer_cycles(void)
static inline uint64_t
rte_get_timer_hz(void)
{
+#ifdef RTE_LIBEAL_USE_HPET
switch(eal_timer_source) {
case EAL_TIMER_TSC:
return rte_get_tsc_hz();
case EAL_TIMER_HPET:
-#ifdef RTE_LIBEAL_USE_HPET
return rte_get_hpet_hz();
-#endif
default: rte_panic("Invalid timer source specified\n");
}
+#else
+ return rte_get_tsc_hz();
+#endif
}
/**
* Wait at least us microseconds.
--
2.12.2