mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-07 03:38:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make mmap() scalable

Browse source 
It's now possible to create thousands of thousands of sparse independent
memory mappings, without any slowdown. The memory manager is better with
tracking memory protection now, particularly on Windows in a precise way
that can be restored during fork(). You now have the highest quality mem
manager possible. It's even better than some OSes like XNU, where mmap()
is implemented as an O(n) operation which means sadly things aren't much
improved over there. With this change the llamafile HTTP server endpoint
at /tokenize with a prompt of 50 tokens is now able to handle 2.6m r/sec
This commit is contained in:
Justine Tunney 2024-07-05 23:13:20 -07:00
parent 3756870635
commit 8c645fa1ee
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
59 changed files with 1238 additions and 1067 deletions
Download patch file Download diff file Expand all files Collapse all files

1
libc/sysv/consts.sh
View file

@ -292,6 +292,7 @@ syscon mprot PROT_NONE 0 0 0 0 0 0 0 0 # mmap, mprotect, unix
syscon mprot PROT_READ 1 1 1 1 1 1 1 1 # mmap, mprotect, unix consensus
syscon mprot PROT_WRITE 2 2 2 2 2 2 2 2 # mmap, mprotect, unix consensus
syscon mprot PROT_EXEC 4 4 4 4 4 4 4 4 # mmap, mprotect, unix consensus
syscon mprot PROT_GUARD 0 0 0 0 0 0 0 0x100 # mmap, mprotect, unix consensus
# mremap() flags
# the revolutionary praxis of realloc()

2
libc/sysv/consts/PROT_GUARD.S Normal file
View file

@ -0,0 +1,2 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon mprot,PROT_GUARD,0,0,0,0,0,0,0,0x100

5
libc/sysv/consts/prot.h
View file

@ -3,10 +3,7 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern const int PROT_NONE;
extern const int PROT_READ;
extern const int PROT_WRITE;
extern const int PROT_EXEC;
extern const int PROT_GUARD;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */