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 <grpc/support/port_platform.h> 16 17 #include "src/core/lib/gprpp/per_cpu.h" 18 19 #include <grpc/support/cpu.h> 20 21 #include "src/core/lib/gpr/useful.h" 22 23 namespace grpc_core { 24 25 thread_local PerCpuShardingHelper::State PerCpuShardingHelper::state_; 26 Shards()27size_t PerCpuOptions::Shards() { 28 return ShardsForCpuCount(gpr_cpu_num_cores()); 29 } 30 ShardsForCpuCount(size_t cpu_count)31size_t PerCpuOptions::ShardsForCpuCount(size_t cpu_count) { 32 return Clamp<size_t>(cpu_count / cpus_per_shard_, 1, max_shards_); 33 } 34 35 } // namespace grpc_core 36