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[37.110.65.23]) by smtp.gmail.com with ESMTPSA id l19sm3017158lji.53.2021.02.13.18.16.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 13 Feb 2021 18:16:27 -0800 (PST) From: Dmitry Kozlyuk To: dev@dpdk.org Cc: Tyler Retzlaff , Mike Wells , Dmitry Kozlyuk , Narcisa Ana Maria Vasile , Dmitry Malloy , Pallavi Kadam , Ray Kinsella , Neil Horman Date: Sun, 14 Feb 2021 05:16:11 +0300 Message-Id: <20210214021616.26970-2-dmitry.kozliuk@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210214021616.26970-1-dmitry.kozliuk@gmail.com> References: <20210214012013.23165-1-dmitry.kozliuk@gmail.com> <20210214021616.26970-1-dmitry.kozliuk@gmail.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v2 1/6] eal: add internal API for current time X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Many PMDs use POSIX gettimeofday(). Add rte_time_get_us() function to obtain current time with microsecond precision on all platforms. Signed-off-by: Dmitry Kozlyuk Acked-by: Nick Connolly Acked-by: Jie Zhou --- lib/librte_eal/include/rte_time.h | 17 +++++++++++++++++ lib/librte_eal/rte_eal_exports.def | 1 + lib/librte_eal/unix/eal_unix_timer.c | 13 +++++++++++++ lib/librte_eal/version.map | 1 + lib/librte_eal/windows/eal_timer.c | 21 ++++++++++++++++++++- 5 files changed, 52 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/include/rte_time.h b/lib/librte_eal/include/rte_time.h index 5ad7c8841..50fa4f889 100644 --- a/lib/librte_eal/include/rte_time.h +++ b/lib/librte_eal/include/rte_time.h @@ -8,6 +8,8 @@ #include #include +#include + #define NSEC_PER_SEC 1000000000L /** @@ -98,4 +100,19 @@ rte_ns_to_timespec(uint64_t nsec) return ts; } +/* Point of time with microsecond precision. */ +struct rte_time_us { + int64_t sec; /**< Number of whole seconds. */ + int64_t usec; /**< Fractional part of second in [0, 999999]. */ +}; + +/** + * Get current system time. + * + * @param now + * Receives current system time. + */ +__rte_internal +void rte_time_get_us(struct rte_time_us *now); + #endif /* _RTE_TIME_H_ */ diff --git a/lib/librte_eal/rte_eal_exports.def b/lib/librte_eal/rte_eal_exports.def index 474cf123f..cb691f7bc 100644 --- a/lib/librte_eal/rte_eal_exports.def +++ b/lib/librte_eal/rte_eal_exports.def @@ -334,3 +334,4 @@ EXPORTS rte_mem_map rte_mem_page_size rte_mem_unmap + rte_time_get_us diff --git a/lib/librte_eal/unix/eal_unix_timer.c b/lib/librte_eal/unix/eal_unix_timer.c index cc5015910..5612fdebe 100644 --- a/lib/librte_eal/unix/eal_unix_timer.c +++ b/lib/librte_eal/unix/eal_unix_timer.c @@ -4,7 +4,10 @@ #include +#include + #include +#include void rte_delay_us_sleep(unsigned int us) @@ -27,3 +30,13 @@ rte_delay_us_sleep(unsigned int us) ind = 1 - ind; } } + +void +rte_time_get_us(struct rte_time_us *now) +{ + struct timeval sys; + + gettimeofday(&sys, NULL); + now->sec = sys.tv_sec; + now->usec = sys.tv_usec; +} diff --git a/lib/librte_eal/version.map b/lib/librte_eal/version.map index fce90a112..405bed766 100644 --- a/lib/librte_eal/version.map +++ b/lib/librte_eal/version.map @@ -421,4 +421,5 @@ INTERNAL { rte_mem_map; rte_mem_page_size; rte_mem_unmap; + rte_time_get_us; }; diff --git a/lib/librte_eal/windows/eal_timer.c b/lib/librte_eal/windows/eal_timer.c index b070cb775..a5c42106a 100644 --- a/lib/librte_eal/windows/eal_timer.c +++ b/lib/librte_eal/windows/eal_timer.c @@ -9,6 +9,7 @@ #include #include #include +#include #include "eal_private.h" #define US_PER_SEC 1E6 @@ -85,10 +86,28 @@ get_tsc_freq(void) return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ); } - int rte_eal_timer_init(void) { set_tsc_freq(); return 0; } + +void +rte_time_get_us(struct rte_time_us *now) +{ + /* 100ns ticks from 1601-01-01 to 1970-01-01 */ + static const uint64_t EPOCH = 116444736000000000ULL; + static const uint64_t TICKS_PER_USEC = 10; + static const uint64_t USEC_PER_SEC = 1000000; + + FILETIME ft; + uint64_t ticks, sec; + + GetSystemTimePreciseAsFileTime(&ft); + ticks = ((uint64_t)ft.dwHighDateTime << 32) | ft.dwLowDateTime; + ticks -= EPOCH; + sec = ticks / (TICKS_PER_USEC * USEC_PER_SEC); + now->sec = sec; + now->usec = ticks / TICKS_PER_USEC - sec * USEC_PER_SEC; +}