a86c94b3d1
This patch cleans up the header file, structures and parameters of scheduler API. While documenting the functionality. - made scheduler name const - removed typedefs for schedueler callbacks - balance() now accepts uint32_t for array size instead of an int - removed unused _spdk_lw_thread_set_core() - renamed _spdk_scheduler_period_set() to _spdk_scheduler_set_period() - renamed _spdk_scheduler_period_get() to _spdk_scheduler_get_period() - renamed _spdk_scheduler_list_add() to _spdk_scheduler_register() This is preparation to making this API public. Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Change-Id: Ia7b6b6a5eafb052ac275db6c04113a8ad442383f Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8842 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Community-CI: Mellanox Build Bot Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Konrad Sztyber <konrad.sztyber@gmail.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
117 lines
3.7 KiB
C
117 lines
3.7 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/stdinc.h"
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#include "spdk/likely.h"
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#include "spdk_internal/event.h"
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#include "spdk/thread.h"
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#include "spdk/log.h"
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#include "spdk/env.h"
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static int
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init(void)
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{
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return _spdk_governor_set("dpdk_governor");
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}
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static void
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deinit(void)
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{
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_spdk_governor_set(NULL);
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}
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static void
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balance(struct spdk_scheduler_core_info *cores, uint32_t core_count)
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{
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struct spdk_governor *governor;
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struct spdk_scheduler_core_info *core;
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struct spdk_governor_capabilities capabilities;
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uint32_t i;
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int rc;
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governor = _spdk_governor_get();
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assert(governor != NULL);
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/* Gather active/idle statistics */
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SPDK_ENV_FOREACH_CORE(i) {
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core = &cores[i];
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rc = governor->get_core_capabilities(core->lcore, &capabilities);
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if (rc < 0) {
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SPDK_ERRLOG("failed to get capabilities for core: %u\n", core->lcore);
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return;
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}
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if (core->total_busy_tsc < (core->total_idle_tsc / 1000)) {
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rc = governor->set_core_freq_min(core->lcore);
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if (rc < 0) {
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SPDK_ERRLOG("setting to minimal frequency for core %u failed\n", core->lcore);
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}
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SPDK_DEBUGLOG(reactor, "setting to minimal frequency for core: %u\n", core->lcore);
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} else if (core->total_idle_tsc > core->total_busy_tsc) {
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rc = governor->core_freq_down(core->lcore);
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if (rc < 0) {
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SPDK_ERRLOG("lowering frequency for core %u failed\n", core->lcore);
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}
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SPDK_DEBUGLOG(reactor, "lowering frequency for core: %u\n", core->lcore);
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} else if (core->total_idle_tsc < (core->total_busy_tsc / 1000)) {
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rc = governor->set_core_freq_max(core->lcore);
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if (rc < 0) {
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SPDK_ERRLOG("setting to maximal frequency for core %u failed\n", core->lcore);
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}
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SPDK_DEBUGLOG(reactor, "setting to maximum frequency for core: %u\n", core->lcore);
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} else {
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rc = governor->core_freq_up(core->lcore);
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if (rc < 0) {
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SPDK_ERRLOG("increasing frequency for core %u failed\n", core->lcore);
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}
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SPDK_DEBUGLOG(reactor, "increasing frequency for core: %u\n", core->lcore);
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}
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}
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}
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static struct spdk_scheduler gscheduler = {
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.name = "gscheduler",
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.init = init,
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.deinit = deinit,
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.balance = balance,
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};
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SPDK_SCHEDULER_REGISTER(gscheduler);
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