[Xen-devel] [PATCH] Optimizing x86-64 xenlinux using global pages for user mode

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

This was based on Ian's idea, but the patch attached offers measurable
performance improvements by retaining TLB for user processes at
transitions between user and kernel mode, which can occur very
frequently in various workloads. 

I would like to thank Andrew Theurer for conducting benchmarks
thoroughly and collecting profile data from them. That was very helpful
when making this patch.

 linux-2.6-xen-sparse/arch/i386/mm/ioremap-xen.c                |    3 
 linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c                 |    6 
 linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/pgtable.h |   21
+--
 xen/arch/x86/flushtlb.c                                        |    9 +
 xen/arch/x86/mm.c                                              |   69
+++++++++-
 xen/arch/x86/x86_64/traps.c                                    |    5 
 xen/include/asm-x86/flushtlb.h                                 |    7 -
 xen/include/asm-x86/shadow.h                                   |   19
+-
 xen/include/asm-x86/x86_64/page.h                              |    2 
 9 files changed, 106 insertions(+), 35 deletions(-)

Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>

Jun
---
Intel Open Source Technology Center

Attachment: global_64.patch
Description: global_64.patch

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