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[Qemu-devel] [PATCH v2 6/8] More optimized qemu_put_be64/32/16
From: |
Orit Wasserman |
Subject: |
[Qemu-devel] [PATCH v2 6/8] More optimized qemu_put_be64/32/16 |
Date: |
Thu, 21 Mar 2013 15:23:48 +0200 |
qemu_put_be functions used qemu_put_byte this caused lots of 1 bytes buffers
in the iovec.
we move to use cpu_put_be64/32/16wu and put a single buffer per call.
Signed-off-by: Orit Wasserman <address@hidden>
---
savevm.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/savevm.c b/savevm.c
index fde59d3..b724527 100644
--- a/savevm.c
+++ b/savevm.c
@@ -789,22 +789,26 @@ void qemu_file_reset_rate_limit(QEMUFile *f)
void qemu_put_be16(QEMUFile *f, unsigned int v)
{
- qemu_put_byte(f, v >> 8);
- qemu_put_byte(f, v);
+ uint16_t p;
+ cpu_to_be16wu(&p, v);
+
+ qemu_put_buffer(f, (uint8_t *)&p, sizeof(p));
}
void qemu_put_be32(QEMUFile *f, unsigned int v)
{
- qemu_put_byte(f, v >> 24);
- qemu_put_byte(f, v >> 16);
- qemu_put_byte(f, v >> 8);
- qemu_put_byte(f, v);
+ uint32_t p;
+ cpu_to_be32wu(&p, v);
+
+ qemu_put_buffer(f, (uint8_t *)&p, sizeof(p));
}
void qemu_put_be64(QEMUFile *f, uint64_t v)
{
- qemu_put_be32(f, v >> 32);
- qemu_put_be32(f, v);
+ uint64_t p;
+ cpu_to_be64wu(&p, v);
+
+ qemu_put_buffer(f, (uint8_t *)&p, sizeof(p));
}
unsigned int qemu_get_be16(QEMUFile *f)
--
1.7.11.7
- [Qemu-devel] [PATCH v2 0/8] Migration: Remove copying of guest ram pages, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 2/8] Add socket_writev_buffer function, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 1/8] Add QemuFileWritevBuffer QemuFileOps, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 3/8] Update bytes_xfer in qemu_put_byte, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 6/8] More optimized qemu_put_be64/32/16,
Orit Wasserman <=
- [Qemu-devel] [PATCH v2 4/8] Store the data to send also in iovec, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 5/8] Use writev ops if available, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 7/8] Add qemu_put_buffer_no_copy, Orit Wasserman, 2013/03/21
- [Qemu-devel] [PATCH v2 8/8] Use qemu_put_buffer_no_copy for guest memory pages, Orit Wasserman, 2013/03/21