2b8c23c7b8
Previously, the maximum core value was cached in a static variable, but this isn't safe if multiple threads are calling at the same time. Iterating over all core numbers is not very expensive, so just recalculate the value for every call. Change-Id: I4fab072f4a96ecc8801e1db293b3921a6f1534f9 Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-on: https://review.gerrithub.io/399930 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/env.h"
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#include <rte_config.h>
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#include <rte_lcore.h>
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uint32_t
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spdk_env_get_core_count(void)
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{
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return rte_lcore_count();
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}
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uint32_t
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spdk_env_get_current_core(void)
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{
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return rte_lcore_id();
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}
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uint32_t
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spdk_env_get_first_core(void)
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{
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return rte_get_next_lcore(-1, 0, 0);
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}
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uint32_t
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spdk_env_get_last_core(void)
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{
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uint32_t i;
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uint32_t last_core = UINT32_MAX;
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SPDK_ENV_FOREACH_CORE(i) {
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last_core = i;
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}
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return last_core;
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}
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uint32_t
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spdk_env_get_next_core(uint32_t prev_core)
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{
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unsigned lcore;
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lcore = rte_get_next_lcore(prev_core, 0, 0);
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if (lcore == RTE_MAX_LCORE) {
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return UINT32_MAX;
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}
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return lcore;
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}
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uint32_t
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spdk_env_get_socket_id(uint32_t core)
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{
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return rte_lcore_to_socket_id(core);
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}
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int
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spdk_env_thread_launch_pinned(uint32_t core, thread_start_fn fn, void *arg)
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{
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int rc;
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rc = rte_eal_remote_launch(fn, arg, core);
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return rc;
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}
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void
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spdk_env_thread_wait_all(void)
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{
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rte_eal_mp_wait_lcore();
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}
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