From 540fbc27869bf9c3c37319f4df4372e23f0d1d6a Mon Sep 17 00:00:00 2001 From: Fady Bader Date: Thu, 18 Jun 2020 09:55:22 +0300 Subject: [PATCH] timer: support EAL functions on Windows Implemented the needed Windows eal timer functions. Signed-off-by: Fady Bader Reviewed-by: Tal Shnaiderman Tested-by: Dmitry Kozlyuk Acked-by: Ranjit Menon --- lib/librte_eal/common/meson.build | 1 + lib/librte_eal/windows/eal.c | 6 ++ lib/librte_eal/windows/eal_timer.c | 94 +++++++++++++++++++++++++ lib/librte_eal/windows/include/rte_os.h | 2 + lib/librte_eal/windows/meson.build | 1 + 5 files changed, 104 insertions(+) create mode 100644 lib/librte_eal/windows/eal_timer.c diff --git a/lib/librte_eal/common/meson.build b/lib/librte_eal/common/meson.build index 3108442697..4bdf77922f 100644 --- a/lib/librte_eal/common/meson.build +++ b/lib/librte_eal/common/meson.build @@ -26,6 +26,7 @@ if is_windows 'malloc_elem.c', 'malloc_heap.c', 'rte_malloc.c', + 'eal_common_timer.c', ) subdir_done() endif diff --git a/lib/librte_eal/windows/eal.c b/lib/librte_eal/windows/eal.c index 427a5557fa..b6bffd3d92 100644 --- a/lib/librte_eal/windows/eal.c +++ b/lib/librte_eal/windows/eal.c @@ -354,6 +354,12 @@ rte_eal_init(int argc, char **argv) return -1; } + if (rte_eal_timer_init() < 0) { + rte_eal_init_alert("Cannot init TSC timer"); + rte_errno = EFAULT; + return -1; + } + eal_thread_init_master(rte_config.master_lcore); RTE_LCORE_FOREACH_SLAVE(i) { diff --git a/lib/librte_eal/windows/eal_timer.c b/lib/librte_eal/windows/eal_timer.c new file mode 100644 index 0000000000..b070cb7751 --- /dev/null +++ b/lib/librte_eal/windows/eal_timer.c @@ -0,0 +1,94 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2020 Mellanox Technologies, Ltd + */ + +#include + +#include +#include +#include +#include +#include +#include "eal_private.h" + +#define US_PER_SEC 1E6 +#define CYC_PER_10MHZ 1E7 + +void +rte_delay_us_sleep(unsigned int us) +{ + HANDLE timer; + LARGE_INTEGER due_time; + + /* create waitable timer */ + timer = CreateWaitableTimer(NULL, TRUE, NULL); + if (!timer) { + RTE_LOG_WIN32_ERR("CreateWaitableTimer()"); + rte_errno = ENOMEM; + return; + } + + /* + * due_time's uom is 100 ns, multiply by 10 to convert to microseconds + * set us microseconds time for timer + */ + due_time.QuadPart = -((int64_t)us * 10); + if (!SetWaitableTimer(timer, &due_time, 0, NULL, NULL, FALSE)) { + RTE_LOG_WIN32_ERR("SetWaitableTimer()"); + rte_errno = EINVAL; + goto end; + } + /* start wait for timer for us microseconds */ + if (WaitForSingleObject(timer, INFINITE) == WAIT_FAILED) { + RTE_LOG_WIN32_ERR("WaitForSingleObject()"); + rte_errno = EINVAL; + } + +end: + CloseHandle(timer); +} + +uint64_t +get_tsc_freq(void) +{ + LARGE_INTEGER t_start, t_end, elapsed_us; + LARGE_INTEGER frequency; + uint64_t tsc_hz; + uint64_t end, start; + + QueryPerformanceFrequency(&frequency); + + QueryPerformanceCounter(&t_start); + start = rte_get_tsc_cycles(); + + rte_delay_us_sleep(US_PER_SEC / 10); /* 1/10 second */ + + if (rte_errno != 0) + return 0; + + QueryPerformanceCounter(&t_end); + end = rte_get_tsc_cycles(); + + elapsed_us.QuadPart = t_end.QuadPart - t_start.QuadPart; + + /* + * To guard against loss-of-precision, convert to microseconds + * *before* dividing by ticks-per-second. + */ + elapsed_us.QuadPart *= US_PER_SEC; + elapsed_us.QuadPart /= frequency.QuadPart; + + double secs = ((double)elapsed_us.QuadPart)/US_PER_SEC; + tsc_hz = (uint64_t)((end - start)/secs); + + /* Round up to 10Mhz. 1E7 ~ 10Mhz */ + return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ); +} + + +int +rte_eal_timer_init(void) +{ + set_tsc_freq(); + return 0; +} diff --git a/lib/librte_eal/windows/include/rte_os.h b/lib/librte_eal/windows/include/rte_os.h index cb10d6494f..569ed92d51 100644 --- a/lib/librte_eal/windows/include/rte_os.h +++ b/lib/librte_eal/windows/include/rte_os.h @@ -25,6 +25,8 @@ extern "C" { #define PATH_MAX _MAX_PATH #endif +#define sleep(x) Sleep(1000 * (x)) + #define strerror_r(a, b, c) strerror_s(b, c, a) /* strdup is deprecated in Microsoft libc and _strdup is preferred */ diff --git a/lib/librte_eal/windows/meson.build b/lib/librte_eal/windows/meson.build index ded5a2b808..08c888e018 100644 --- a/lib/librte_eal/windows/meson.build +++ b/lib/librte_eal/windows/meson.build @@ -14,6 +14,7 @@ sources += files( 'eal_memory.c', 'eal_mp.c', 'eal_thread.c', + 'eal_timer.c', 'fnmatch.c', 'getopt.c', ) -- 2.20.1