Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause 2 : * Copyright (C) 2021 Intel Corporation. 3 : * All rights reserved. 4 : */ 5 : 6 : #include "spdk/stdinc.h" 7 : #include "spdk/likely.h" 8 : 9 : #include "spdk_internal/event.h" 10 : #include "spdk/thread.h" 11 : 12 : #include "spdk/log.h" 13 : #include "spdk/env.h" 14 : #include "spdk/scheduler.h" 15 : 16 : static int 17 0 : init(void) 18 : { 19 0 : return spdk_governor_set("dpdk_governor"); 20 : } 21 : 22 : static void 23 0 : deinit(void) 24 : { 25 0 : spdk_governor_set(NULL); 26 0 : } 27 : 28 : static void 29 0 : balance(struct spdk_scheduler_core_info *cores, uint32_t core_count) 30 : { 31 : struct spdk_governor *governor; 32 : struct spdk_scheduler_core_info *core; 33 0 : struct spdk_governor_capabilities capabilities; 34 : uint32_t i; 35 : int rc; 36 : 37 0 : governor = spdk_governor_get(); 38 0 : assert(governor != NULL); 39 : 40 : /* Gather active/idle statistics */ 41 0 : SPDK_ENV_FOREACH_CORE(i) { 42 0 : core = &cores[i]; 43 : 44 0 : rc = governor->get_core_capabilities(core->lcore, &capabilities); 45 0 : if (rc < 0) { 46 0 : SPDK_ERRLOG("failed to get capabilities for core: %u\n", core->lcore); 47 0 : return; 48 : } 49 : 50 0 : if (core->current_busy_tsc < (core->current_idle_tsc / 1000)) { 51 0 : rc = governor->set_core_freq_min(core->lcore); 52 0 : if (rc < 0) { 53 0 : SPDK_ERRLOG("setting to minimal frequency for core %u failed\n", core->lcore); 54 : } 55 0 : } else if (core->current_idle_tsc > core->current_busy_tsc) { 56 0 : rc = governor->core_freq_down(core->lcore); 57 0 : if (rc < 0) { 58 0 : SPDK_ERRLOG("lowering frequency for core %u failed\n", core->lcore); 59 : } 60 0 : } else if (core->current_idle_tsc < (core->current_busy_tsc / 1000)) { 61 0 : rc = governor->set_core_freq_max(core->lcore); 62 0 : if (rc < 0) { 63 0 : SPDK_ERRLOG("setting to maximal frequency for core %u failed\n", core->lcore); 64 : } 65 : } else { 66 0 : rc = governor->core_freq_up(core->lcore); 67 0 : if (rc < 0) { 68 0 : SPDK_ERRLOG("increasing frequency for core %u failed\n", core->lcore); 69 : } 70 : } 71 : } 72 : } 73 : 74 : static struct spdk_scheduler gscheduler = { 75 : .name = "gscheduler", 76 : .init = init, 77 : .deinit = deinit, 78 : .balance = balance, 79 : }; 80 : 81 0 : SPDK_SCHEDULER_REGISTER(gscheduler);