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Add statically linked libnuma support for AOT (#80671)
* Add statically linked libnuma support for AOT * Fix windows build * Update src/coreclr/nativeaot/docs/compiling.md * Align formatting in doc * Address CR feedback * Add ability to skip static PIE * Cleanup pal.cpp * Highlight LGPL with a note in doc Co-authored-by: Jan Kotas <jkotas@microsoft.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| #include "numasupport.h" | ||
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| // The highest NUMA node available | ||
| int g_highestNumaNode = 0; | ||
| // Is numa available | ||
| bool g_numaAvailable = false; | ||
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| #if HAVE_NUMA_H | ||
| #include <unistd.h> | ||
| #include <errno.h> | ||
| #include <stdio.h> | ||
| #include <dlfcn.h> | ||
| #include <sys/types.h> | ||
| #include <sys/stat.h> | ||
| #include <fcntl.h> | ||
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| #define PER_FUNCTION_BLOCK(fn) decltype(fn)* fn##_ptr; | ||
| FOR_ALL_NUMA_FUNCTIONS | ||
| #undef PER_FUNCTION_BLOCK | ||
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| void* g_numaHandle = nullptr; | ||
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| static bool ShouldOpenLibNuma() | ||
| { | ||
| #ifdef TARGET_LINUX | ||
| // This is a simple heuristic to determine if libnuma.so should be opened. There's | ||
| // no point in linking and resolving everything in this library if we're running on | ||
| // a system that's not NUMA-capable. | ||
| int fd = open("/sys/devices/system/node/possible", O_RDONLY | O_CLOEXEC); | ||
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| if (fd == -1) | ||
| { | ||
| // sysfs might not be mounted, not available, or the interface might have | ||
| // changed. Return `true' here so NUMASupportInitialize() can try initializing | ||
| // NUMA support with libnuma. | ||
| return true; | ||
| } | ||
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| while (true) | ||
| { | ||
| char buffer[32]; | ||
| ssize_t bytesRead = read(fd, buffer, 32); | ||
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| if (bytesRead == -1 && errno == EINTR) | ||
| { | ||
| continue; | ||
| } | ||
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| close(fd); | ||
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| // If an unknown error happened (bytesRead < 0), or the file was empty | ||
| // (bytesRead = 0), let libnuma handle this. Otherwise, if there's just | ||
| // one NUMA node, don't bother linking in libnuma. | ||
| return (bytesRead <= 0) ? true : strncmp(buffer, "0\n", bytesRead) != 0; | ||
| } | ||
| #else | ||
| return true; | ||
| #endif // TARGET_LINUX | ||
| } | ||
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| #endif // HAVE_NUMA_H | ||
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| // Initialize data structures for getting and setting thread affinities to processors and | ||
| // querying NUMA related processor information. | ||
| // On systems with no NUMA support, it behaves as if there was a single NUMA node with | ||
| // a single group of processors. | ||
| void NUMASupportInitialize() | ||
| { | ||
| #if HAVE_NUMA_H | ||
| if (!ShouldOpenLibNuma()) | ||
| { | ||
| g_numaAvailable = false; | ||
| g_highestNumaNode = 0; | ||
| return; | ||
| } | ||
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| g_numaHandle = dlopen("libnuma.so.1", RTLD_LAZY); | ||
| if (g_numaHandle == 0) | ||
| { | ||
| g_numaHandle = dlopen("libnuma.so.1.0.0", RTLD_LAZY); | ||
| if (g_numaHandle == 0) | ||
| { | ||
| g_numaHandle = dlopen("libnuma.so", RTLD_LAZY); | ||
| } | ||
| } | ||
| if (g_numaHandle != 0) | ||
| { | ||
| #define PER_FUNCTION_BLOCK(fn) \ | ||
| fn##_ptr = (decltype(fn)*)dlsym(g_numaHandle, #fn); \ | ||
| if (fn##_ptr == NULL) { fprintf(stderr, "Cannot get symbol " #fn " from libnuma\n"); abort(); } | ||
| FOR_ALL_NUMA_FUNCTIONS | ||
| #undef PER_FUNCTION_BLOCK | ||
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| if (numa_available() == -1) | ||
| { | ||
| dlclose(g_numaHandle); | ||
| } | ||
| else | ||
| { | ||
| g_numaAvailable = true; | ||
| g_highestNumaNode = numa_max_node(); | ||
| } | ||
| } | ||
| #endif // HAVE_NUMA_H | ||
| if (!g_numaAvailable) | ||
| { | ||
| // No NUMA | ||
| g_highestNumaNode = 0; | ||
| } | ||
| } | ||
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| // Cleanup of the NUMA support data structures | ||
| void NUMASupportCleanup() | ||
| { | ||
| #if HAVE_NUMA_H | ||
| if (g_numaAvailable) | ||
| { | ||
| dlclose(g_numaHandle); | ||
| } | ||
| #endif // HAVE_NUMA_H | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| #ifndef __NUMASUPPORT_H__ | ||
| #define __NUMASUPPORT_H__ | ||
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| #include "config.gc.h" | ||
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| #if HAVE_NUMA_H | ||
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| #include <numa.h> | ||
| #include <numaif.h> | ||
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| #endif // HAVE_NUMA_H | ||
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| void NUMASupportInitialize(); | ||
| void NUMASupportCleanup(); | ||
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| #if HAVE_NUMA_H | ||
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| // List of all functions from the numa library that are used | ||
| #define FOR_ALL_NUMA_FUNCTIONS \ | ||
| PER_FUNCTION_BLOCK(mbind) \ | ||
| PER_FUNCTION_BLOCK(numa_available) \ | ||
| PER_FUNCTION_BLOCK(numa_max_node) \ | ||
| PER_FUNCTION_BLOCK(numa_node_of_cpu) | ||
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| // Declare pointers to all the used numa functions | ||
| #define PER_FUNCTION_BLOCK(fn) extern decltype(fn)* fn##_ptr; | ||
| FOR_ALL_NUMA_FUNCTIONS | ||
| #undef PER_FUNCTION_BLOCK | ||
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| // Redefine all calls to numa functions as calls through pointers that are set | ||
| // to the functions of libnuma in the initialization. | ||
| #define mbind(...) mbind_ptr(__VA_ARGS__) | ||
| #define numa_available() numa_available_ptr() | ||
| #define numa_max_node() numa_max_node_ptr() | ||
| #define numa_node_of_cpu(...) numa_node_of_cpu_ptr(__VA_ARGS__) | ||
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| #endif // HAVE_NUMA_H | ||
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| #endif // __NUMASUPPORT_H__ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| #include "numasupport.h" | ||
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| #if HAVE_NUMA_H | ||
| #define PER_FUNCTION_BLOCK(fn) decltype(fn)* fn##_ptr = fn; | ||
| FOR_ALL_NUMA_FUNCTIONS | ||
| #undef PER_FUNCTION_BLOCK | ||
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| #endif // HAVE_NUMA_H | ||
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| // The highest NUMA node available | ||
| int g_highestNumaNode = 0; | ||
| // Is numa available | ||
| bool g_numaAvailable = false; | ||
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| void NUMASupportInitialize() | ||
| { | ||
| #if HAVE_NUMA_H | ||
| if (numa_available() != -1) | ||
| { | ||
| g_numaAvailable = true; | ||
| g_highestNumaNode = numa_max_node(); | ||
| } | ||
| #endif // HAVE_NUMA_H | ||
| } | ||
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| void NUMASupportCleanup() | ||
| { | ||
| // nop | ||
| } |
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