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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;
}