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radv: using tls to store llvm related info and speed up compiles (v10)

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This uses the common compiler passes abstraction to help radv
avoid fixed cost compiler overheads. This uses a linked list per
thread stored in thread local storage, with an entry in the list
for each target machine.

This should remove all the fixed overheads setup costs of creating
the pass manager each time.

This takes a demo app time to compile the radv meta shaders on nocache
and exit from 1.7s to 1s. It also has been reported to take the startup
time of uncached shaders on RoTR from 12m24s to 11m35s (Alex)

v2: fix llvm6 build, inline emit function, handle multiple targets
in one thread
v3: rebase and port onto new structure
v4: rename some vars (Bas)
v5: drag all code into radv for now, we can refactor it out later
for radeonsi if we make it shareable
v6: use a bit more C++ in the wrapper
v7: logic bugs fixed so it actually runs again.
v8: rebase on top of radeonsi changes.
v9: drop some C++ headers, cleanup list entry
v10: use pop_back (didn't have enough caffeine)

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Dave Airlie
2018-06-27 11:34:25 +10:00
parent c1ec582059
commit 6f3aee40f9
8 changed files with 199 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/amd/vulkan/radv_nir_to_llvm.c
View File

@@ -27,6 +27,7 @@
#include "radv_private.h"
#include "radv_shader.h"
#include "radv_shader_helper.h"
#include "nir/nir.h"
#include <llvm-c/Core.h>
@@ -3331,12 +3332,7 @@ static unsigned ac_llvm_compile(LLVMModuleRef M,
struct ac_llvm_compiler *ac_llvm)
{
unsigned retval = 0;
char *err;
LLVMContextRef llvm_ctx;
LLVMMemoryBufferRef out_buffer;
unsigned buffer_size;
const char *buffer_data;
LLVMBool mem_err;
/* Setup Diagnostic Handler*/
llvm_ctx = LLVMGetModuleContext(M);
@@ -3345,27 +3341,8 @@ static unsigned ac_llvm_compile(LLVMModuleRef M,
&retval);
/* Compile IR*/
mem_err = LLVMTargetMachineEmitToMemoryBuffer(ac_llvm->tm, M, LLVMObjectFile,
&err, &out_buffer);
/* Process Errors/Warnings */
if (mem_err) {
fprintf(stderr, "%s: %s", __FUNCTION__, err);
free(err);
if (!radv_compile_to_binary(ac_llvm, M, binary))
retval = 1;
goto out;
}
/* Extract Shader Code*/
buffer_size = LLVMGetBufferSize(out_buffer);
buffer_data = LLVMGetBufferStart(out_buffer);
ac_elf_read(buffer_data, buffer_size, binary);
/* Clean up */
LLVMDisposeMemoryBuffer(out_buffer);
out:
return retval;
}