From: Cunming Liang Date: Tue, 17 Feb 2015 02:08:03 +0000 (+0800) Subject: eal: thread affinity API X-Git-Tag: spdx-start~9574 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=9e29251b2afa0d3ee45f9851f889522ceba9d950;p=dpdk.git eal: thread affinity API 1. add two TLS *_socket_id* and *_cpuset* 2. add one internal API, eal_cpu_socket_id/eal_thread_dump_affinity 3. add two public API, rte_thread_set/get_affinity 4. update EAL version map for EAL public API The API works for both EAL thread and non EAL thread. When calling rte_thread_set_affinity, the *_socket_id* and *_cpuset* of calling thread will be updated if the thread successfully set the cpu affinity. Signed-off-by: Cunming Liang Acked-by: Olivier Matz Acked-by: Konstantin Ananyev --- diff --git a/lib/librte_eal/bsdapp/eal/Makefile b/lib/librte_eal/bsdapp/eal/Makefile index ae214a4dbc..2357cfac8a 100644 --- a/lib/librte_eal/bsdapp/eal/Makefile +++ b/lib/librte_eal/bsdapp/eal/Makefile @@ -77,6 +77,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_hexdump.c SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_devargs.c SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_dev.c SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_options.c +SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_thread.c CFLAGS_eal.o := -D_GNU_SOURCE #CFLAGS_eal_thread.o := -D_GNU_SOURCE diff --git a/lib/librte_eal/bsdapp/eal/eal_thread.c b/lib/librte_eal/bsdapp/eal/eal_thread.c index 990c0175fc..d0c077bb06 100644 --- a/lib/librte_eal/bsdapp/eal/eal_thread.c +++ b/lib/librte_eal/bsdapp/eal/eal_thread.c @@ -57,6 +57,8 @@ #include "eal_thread.h" RTE_DEFINE_PER_LCORE(unsigned, _lcore_id); +RTE_DEFINE_PER_LCORE(unsigned, _socket_id); +RTE_DEFINE_PER_LCORE(rte_cpuset_t, _cpuset); /* * Send a message to a slave lcore identified by slave_id to call a diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map index 5ed6e4de96..c207ceed1a 100644 --- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map +++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map @@ -83,6 +83,8 @@ DPDK_2.0 { rte_snprintf; rte_strerror; rte_strsplit; + rte_thread_get_affinity; + rte_thread_set_affinity; rte_vlog; rte_xen_dom0_memory_attach; rte_xen_dom0_memory_init; diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c new file mode 100644 index 0000000000..f4d98928f7 --- /dev/null +++ b/lib/librte_eal/common/eal_common_thread.c @@ -0,0 +1,150 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "eal_thread.h" + +int eal_cpuset_socket_id(rte_cpuset_t *cpusetp) +{ + unsigned cpu = 0; + int socket_id = SOCKET_ID_ANY; + int sid; + + if (cpusetp == NULL) + return SOCKET_ID_ANY; + + do { + if (!CPU_ISSET(cpu, cpusetp)) + continue; + + if (socket_id == SOCKET_ID_ANY) + socket_id = eal_cpu_socket_id(cpu); + + sid = eal_cpu_socket_id(cpu); + if (socket_id != sid) { + socket_id = SOCKET_ID_ANY; + break; + } + + } while (++cpu < RTE_MAX_LCORE); + + return socket_id; +} + +int +rte_thread_set_affinity(rte_cpuset_t *cpusetp) +{ + int s; + unsigned lcore_id; + pthread_t tid; + + tid = pthread_self(); + + s = pthread_setaffinity_np(tid, sizeof(rte_cpuset_t), cpusetp); + if (s != 0) { + RTE_LOG(ERR, EAL, "pthread_setaffinity_np failed\n"); + return -1; + } + + /* store socket_id in TLS for quick access */ + RTE_PER_LCORE(_socket_id) = + eal_cpuset_socket_id(cpusetp); + + /* store cpuset in TLS for quick access */ + memmove(&RTE_PER_LCORE(_cpuset), cpusetp, + sizeof(rte_cpuset_t)); + + lcore_id = rte_lcore_id(); + if (lcore_id != (unsigned)LCORE_ID_ANY) { + /* EAL thread will update lcore_config */ + lcore_config[lcore_id].socket_id = RTE_PER_LCORE(_socket_id); + memmove(&lcore_config[lcore_id].cpuset, cpusetp, + sizeof(rte_cpuset_t)); + } + + return 0; +} + +void +rte_thread_get_affinity(rte_cpuset_t *cpusetp) +{ + assert(cpusetp); + memmove(cpusetp, &RTE_PER_LCORE(_cpuset), + sizeof(rte_cpuset_t)); +} + +int +eal_thread_dump_affinity(char *str, unsigned size) +{ + rte_cpuset_t cpuset; + unsigned cpu; + int ret; + unsigned int out = 0; + + rte_thread_get_affinity(&cpuset); + + for (cpu = 0; cpu < RTE_MAX_LCORE; cpu++) { + if (!CPU_ISSET(cpu, &cpuset)) + continue; + + ret = snprintf(str + out, + size - out, "%u,", cpu); + if (ret < 0 || (unsigned)ret >= size - out) { + /* string will be truncated */ + ret = -1; + goto exit; + } + + out += ret; + } + + ret = 0; +exit: + /* remove the last separator */ + if (out > 0) + str[out - 1] = '\0'; + + return ret; +} diff --git a/lib/librte_eal/common/eal_thread.h b/lib/librte_eal/common/eal_thread.h index f1ce0bdaaf..e4e76b9da1 100644 --- a/lib/librte_eal/common/eal_thread.h +++ b/lib/librte_eal/common/eal_thread.h @@ -34,6 +34,8 @@ #ifndef EAL_THREAD_H #define EAL_THREAD_H +#include + /** * basic loop of thread, called for each thread by eal_init(). * @@ -61,4 +63,38 @@ void eal_thread_init_master(unsigned lcore_id); */ unsigned eal_cpu_socket_id(unsigned cpu_id); +/** + * Get the NUMA socket id from cpuset. + * This function is private to EAL. + * + * @param cpusetp + * The point to a valid cpu set. + * @return + * socket_id or SOCKET_ID_ANY + */ +int eal_cpuset_socket_id(rte_cpuset_t *cpusetp); + +/** + * Default buffer size to use with eal_thread_dump_affinity() + */ +#define RTE_CPU_AFFINITY_STR_LEN 256 + +/** + * Dump the current pthread cpuset. + * This function is private to EAL. + * + * Note: + * If the dump size is greater than the size of given buffer, + * the string will be truncated and with '\0' at the end. + * + * @param str + * The string buffer the cpuset will dump to. + * @param size + * The string buffer size. + * @return + * 0 for success, -1 if truncation happens. + */ +int +eal_thread_dump_affinity(char *str, unsigned size); + #endif /* EAL_THREAD_H */ diff --git a/lib/librte_eal/common/include/rte_lcore.h b/lib/librte_eal/common/include/rte_lcore.h index 4c7d6bb110..045d4b6a65 100644 --- a/lib/librte_eal/common/include/rte_lcore.h +++ b/lib/librte_eal/common/include/rte_lcore.h @@ -80,7 +80,9 @@ struct lcore_config { */ extern struct lcore_config lcore_config[RTE_MAX_LCORE]; -RTE_DECLARE_PER_LCORE(unsigned, _lcore_id); /**< Per core "core id". */ +RTE_DECLARE_PER_LCORE(unsigned, _lcore_id); /**< Per thread "lcore id". */ +RTE_DECLARE_PER_LCORE(unsigned, _socket_id); /**< Per thread "socket id". */ +RTE_DECLARE_PER_LCORE(rte_cpuset_t, _cpuset); /**< Per thread "cpuset". */ /** * Return the ID of the execution unit we are running on. @@ -229,6 +231,28 @@ rte_get_next_lcore(unsigned i, int skip_master, int wrap) i