Date: 25 Feb 2003 16:09:25 -0800 From: Arun Sharma <arun.sharma@intel.com> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: freebsd-ia64@FreeBSD.ORG Subject: Re: Slow loading of the kernel from efifs ? Message-ID: <u3cmbnbre.fsf@unix-os.sc.intel.com> In-Reply-To: <20030225213120.GA49775@ns1.xcllnt.net> References: <200302251946.h1PJktr26424@unix-os.sc.intel.com> <20030225213120.GA49775@ns1.xcllnt.net>
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Marcel Moolenaar <marcel@xcllnt.net> writes:
> There may be some low-hanging fruit or even some genuine bugs that
> may improve this without much work, but I haven't looked at it.
Low hanging fruits first. The attached patch reduced the time required
to load the kernel from about 65s to 3s on the Tiger4.
-Arun
--- sys/boot/efi/libefi/efifs.c- Tue Feb 25 22:57:45 2003
+++ sys/boot/efi/libefi/efifs.c Tue Feb 25 22:58:53 2003
@@ -112,6 +112,8 @@
return 0;
}
+#define EFI_BLOCK_SIZE (1024 * 1024)
+
static int
efifs_read(struct open_file *f, void *buf, size_t size, size_t *resid)
{
@@ -123,8 +125,8 @@
bufp = buf;
while (size > 0) {
sz = size;
- if (sz > 8192)
- sz = 8192;
+ if (sz > EFI_BLOCK_SIZE)
+ sz = EFI_BLOCK_SIZE;
status = file->Read(file, &sz, bufp);
twiddle();
if (EFI_ERROR(status))
@@ -150,8 +152,8 @@
bufp = buf;
while (size > 0) {
sz = size;
- if (sz > 8192)
- sz = 8192;
+ if (sz > EFI_BLOCK_SIZE)
+ sz = EFI_BLOCK_SIZE;
status = file->Write(file, &sz, bufp);
twiddle();
if (EFI_ERROR(status))
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