mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 10:52:30 +00:00
51 lines
1.9 KiB
CMake
51 lines
1.9 KiB
CMake
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
# SPDX-License-Identifier: Apache-2.0.
|
|
|
|
include(CheckSymbolExists)
|
|
|
|
# Check if the platform supports setting thread affinity
|
|
# (important for hitting full NIC entitlement on NUMA architectures)
|
|
function(aws_set_thread_affinity_method target)
|
|
|
|
# Non-POSIX, Android, and Apple platforms do not support thread affinity.
|
|
if (NOT UNIX OR ANDROID OR APPLE)
|
|
target_compile_definitions(${target} PRIVATE
|
|
-DAWS_AFFINITY_METHOD=AWS_AFFINITY_METHOD_NONE)
|
|
return()
|
|
endif()
|
|
|
|
cmake_push_check_state()
|
|
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
|
|
list(APPEND CMAKE_REQUIRED_LIBRARIES pthread)
|
|
|
|
set(headers "pthread.h")
|
|
# BSDs put nonportable pthread declarations in a separate header.
|
|
if(CMAKE_SYSTEM_NAME MATCHES BSD)
|
|
set(headers "${headers};pthread_np.h")
|
|
endif()
|
|
|
|
# Using pthread attrs is the preferred method, but is glibc-specific.
|
|
check_symbol_exists(pthread_attr_setaffinity_np "${headers}" USE_PTHREAD_ATTR_SETAFFINITY)
|
|
if (USE_PTHREAD_ATTR_SETAFFINITY)
|
|
target_compile_definitions(${target} PRIVATE
|
|
-DAWS_AFFINITY_METHOD=AWS_AFFINITY_METHOD_PTHREAD_ATTR)
|
|
return()
|
|
endif()
|
|
|
|
# This method is still nonportable, but is supported by musl and BSDs.
|
|
check_symbol_exists(pthread_setaffinity_np "${headers}" USE_PTHREAD_SETAFFINITY)
|
|
if (USE_PTHREAD_SETAFFINITY)
|
|
target_compile_definitions(${target} PRIVATE
|
|
-DAWS_AFFINITY_METHOD=AWS_AFFINITY_METHOD_PTHREAD)
|
|
return()
|
|
endif()
|
|
|
|
# If we got here, we expected thread affinity support but didn't find it.
|
|
# We still build with degraded NUMA performance, but show a warning.
|
|
message(WARNING "No supported method for setting thread affinity")
|
|
target_compile_definitions(${target} PRIVATE
|
|
-DAWS_AFFINITY_METHOD=AWS_AFFINITY_METHOD_NONE)
|
|
|
|
cmake_pop_check_state()
|
|
endfunction()
|