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Terminal: Redraw entire line if any of its characters are dirty.

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This means we only have to do one fill_rect() per line and the whole process
ends up being ~10% faster than before.

Also added a read_tsc() syscall to give userspace access to the TSC.
This commit is contained in:
Andreas Kling 2019-01-25 02:09:29 +01:00
parent 11b73c38d8
commit 267a903dd0
9 changed files with 108 additions and 35 deletions
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10
Kernel/Process.cpp
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@ -2081,3 +2081,13 @@ int Process::sys$unlink(const char* pathname)
return error;
return 0;
}
int Process::sys$read_tsc(dword* lsw, dword* msw)
{
if (!validate_write_typed(lsw))
return -EFAULT;
if (!validate_write_typed(msw))
return -EFAULT;
read_tsc(*lsw, *msw);
return 0;
}

1
Kernel/Process.h
View file

@ -194,6 +194,7 @@ public:
clock_t sys$times(tms*);
int sys$utime(const char* pathname, const struct utimbuf*);
int sys$unlink(const char* pathname);
int sys$read_tsc(dword* lsw, dword* msw);
int gui$create_window(const GUI_WindowParameters*);
int gui$destroy_window(int window_id);

2
Kernel/Syscall.cpp
View file

@ -213,6 +213,8 @@ static dword handle(RegisterDump& regs, dword function, dword arg1, dword arg2,
return current->gui$set_window_rect((int)arg1, (const GUI_Rect*)arg2);
case Syscall::SC_gui_get_window_rect:
return current->gui$get_window_rect((int)arg1, (GUI_Rect*)arg2);
case Syscall::SC_read_tsc:
return current->sys$read_tsc((dword*)arg1, (dword*)arg2);
default:
kprintf("<%u> int0x80: Unknown function %u requested {%x, %x, %x}\n", current->pid(), function, arg1, arg2, arg3);
break;

1
Kernel/Syscall.h
View file

@ -70,6 +70,7 @@
__ENUMERATE_SYSCALL(select) \
__ENUMERATE_SYSCALL(unlink) \
__ENUMERATE_SYSCALL(poll) \
__ENUMERATE_SYSCALL(read_tsc) \
__ENUMERATE_SYSCALL(gui_create_window) \
__ENUMERATE_SYSCALL(gui_destroy_window) \
__ENUMERATE_SYSCALL(gui_get_window_backing_store) \