1 // Copyright 2023 gRPC authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "src/core/util/per_cpu.h" 16 17 #include <grpc/support/cpu.h> 18 #include <grpc/support/port_platform.h> 19 20 #include "src/core/util/useful.h" 21 22 namespace grpc_core { 23 24 thread_local PerCpuShardingHelper::State PerCpuShardingHelper::state_; 25 Shards()26size_t PerCpuOptions::Shards() { 27 return ShardsForCpuCount(gpr_cpu_num_cores()); 28 } 29 ShardsForCpuCount(size_t cpu_count)30size_t PerCpuOptions::ShardsForCpuCount(size_t cpu_count) { 31 return Clamp<size_t>(cpu_count / cpus_per_shard_, 1, max_shards_); 32 } 33 34 } // namespace grpc_core 35