50810f095a
The file rte_config.h is automatically generated and included. No need to #include it. The example performance-thread needs a makefile fix to avoid overwriting the default cflags. Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
234 lines
6.4 KiB
C
234 lines
6.4 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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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 <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <signal.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/epoll.h>
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#include <sys/queue.h>
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#include <rte_log.h>
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#include <rte_memory.h>
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#include <rte_malloc.h>
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#include <rte_atomic.h>
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#include "channel_monitor.h"
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#include "channel_commands.h"
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#include "channel_manager.h"
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#include "power_manager.h"
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#define RTE_LOGTYPE_CHANNEL_MONITOR RTE_LOGTYPE_USER1
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#define MAX_EVENTS 256
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static volatile unsigned run_loop = 1;
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static int global_event_fd;
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static struct epoll_event *global_events_list;
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void channel_monitor_exit(void)
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{
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run_loop = 0;
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rte_free(global_events_list);
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}
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static int
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process_request(struct channel_packet *pkt, struct channel_info *chan_info)
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{
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uint64_t core_mask;
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if (chan_info == NULL)
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return -1;
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if (rte_atomic32_cmpset(&(chan_info->status), CHANNEL_MGR_CHANNEL_CONNECTED,
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CHANNEL_MGR_CHANNEL_PROCESSING) == 0)
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return -1;
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if (pkt->command == CPU_POWER) {
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core_mask = get_pcpus_mask(chan_info, pkt->resource_id);
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if (core_mask == 0) {
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RTE_LOG(ERR, CHANNEL_MONITOR, "Error get physical CPU mask for "
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"channel '%s' using vCPU(%u)\n", chan_info->channel_path,
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(unsigned)pkt->unit);
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return -1;
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}
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if (__builtin_popcountll(core_mask) == 1) {
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unsigned core_num = __builtin_ffsll(core_mask) - 1;
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switch (pkt->unit) {
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case(CPU_POWER_SCALE_MIN):
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power_manager_scale_core_min(core_num);
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break;
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case(CPU_POWER_SCALE_MAX):
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power_manager_scale_core_max(core_num);
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break;
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case(CPU_POWER_SCALE_DOWN):
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power_manager_scale_core_down(core_num);
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break;
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case(CPU_POWER_SCALE_UP):
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power_manager_scale_core_up(core_num);
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break;
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default:
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break;
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}
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} else {
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switch (pkt->unit) {
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case(CPU_POWER_SCALE_MIN):
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power_manager_scale_mask_min(core_mask);
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break;
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case(CPU_POWER_SCALE_MAX):
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power_manager_scale_mask_max(core_mask);
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break;
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case(CPU_POWER_SCALE_DOWN):
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power_manager_scale_mask_down(core_mask);
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break;
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case(CPU_POWER_SCALE_UP):
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power_manager_scale_mask_up(core_mask);
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break;
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default:
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break;
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}
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}
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}
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/* Return is not checked as channel status may have been set to DISABLED
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* from management thread
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*/
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rte_atomic32_cmpset(&(chan_info->status), CHANNEL_MGR_CHANNEL_PROCESSING,
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CHANNEL_MGR_CHANNEL_CONNECTED);
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return 0;
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}
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int
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add_channel_to_monitor(struct channel_info **chan_info)
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{
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struct channel_info *info = *chan_info;
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struct epoll_event event;
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event.events = EPOLLIN;
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event.data.ptr = info;
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if (epoll_ctl(global_event_fd, EPOLL_CTL_ADD, info->fd, &event) < 0) {
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RTE_LOG(ERR, CHANNEL_MONITOR, "Unable to add channel '%s' "
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"to epoll\n", info->channel_path);
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return -1;
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}
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return 0;
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}
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int
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remove_channel_from_monitor(struct channel_info *chan_info)
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{
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if (epoll_ctl(global_event_fd, EPOLL_CTL_DEL, chan_info->fd, NULL) < 0) {
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RTE_LOG(ERR, CHANNEL_MONITOR, "Unable to remove channel '%s' "
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"from epoll\n", chan_info->channel_path);
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return -1;
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}
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return 0;
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}
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int
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channel_monitor_init(void)
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{
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global_event_fd = epoll_create1(0);
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if (global_event_fd == 0) {
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RTE_LOG(ERR, CHANNEL_MONITOR, "Error creating epoll context with "
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"error %s\n", strerror(errno));
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return -1;
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}
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global_events_list = rte_malloc("epoll_events", sizeof(*global_events_list)
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* MAX_EVENTS, RTE_CACHE_LINE_SIZE);
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if (global_events_list == NULL) {
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RTE_LOG(ERR, CHANNEL_MONITOR, "Unable to rte_malloc for "
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"epoll events\n");
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return -1;
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}
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return 0;
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}
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void
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run_channel_monitor(void)
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{
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while (run_loop) {
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int n_events, i;
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n_events = epoll_wait(global_event_fd, global_events_list,
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MAX_EVENTS, 1);
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if (!run_loop)
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break;
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for (i = 0; i < n_events; i++) {
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struct channel_info *chan_info = (struct channel_info *)
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global_events_list[i].data.ptr;
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if ((global_events_list[i].events & EPOLLERR) ||
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(global_events_list[i].events & EPOLLHUP)) {
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RTE_LOG(DEBUG, CHANNEL_MONITOR, "Remote closed connection for "
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"channel '%s'\n", chan_info->channel_path);
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remove_channel(&chan_info);
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continue;
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}
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if (global_events_list[i].events & EPOLLIN) {
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int n_bytes, err = 0;
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struct channel_packet pkt;
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void *buffer = &pkt;
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int buffer_len = sizeof(pkt);
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while (buffer_len > 0) {
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n_bytes = read(chan_info->fd, buffer, buffer_len);
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if (n_bytes == buffer_len)
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break;
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if (n_bytes == -1) {
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err = errno;
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RTE_LOG(DEBUG, CHANNEL_MONITOR, "Received error on "
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"channel '%s' read: %s\n",
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chan_info->channel_path, strerror(err));
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remove_channel(&chan_info);
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break;
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}
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buffer = (char *)buffer + n_bytes;
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buffer_len -= n_bytes;
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}
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if (!err)
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process_request(&pkt, chan_info);
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}
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}
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}
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}
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