From 52aec3308db85f4e9f5c8b9f5dc4fbd0138c6fa4 Mon Sep 17 00:00:00 2001 From: Alex Shi Date: Thu, 28 Jun 2012 09:02:23 +0800 Subject: x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR There are 32 INVALIDATE_TLB_VECTOR now in kernel. That is quite big amount of vector in IDT. But it is still not enough, since modern x86 sever has more cpu number. That still causes heavy lock contention in TLB flushing. The patch using generic smp call function to replace it. That saved 32 vector number in IDT, and resolved the lock contention in TLB flushing on large system. In the NHM EX machine 4P * 8cores * HT = 64 CPUs, hackbench pthread has 3% performance increase. Signed-off-by: Alex Shi Link: http://lkml.kernel.org/r/1340845344-27557-9-git-send-email-alex.shi@intel.com Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/entry_arch.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'arch/x86/include/asm/entry_arch.h') diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h index 0baa628e330c..40afa0005c69 100644 --- a/arch/x86/include/asm/entry_arch.h +++ b/arch/x86/include/asm/entry_arch.h @@ -15,15 +15,6 @@ BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR) BUILD_INTERRUPT(call_function_single_interrupt,CALL_FUNCTION_SINGLE_VECTOR) BUILD_INTERRUPT(irq_move_cleanup_interrupt,IRQ_MOVE_CLEANUP_VECTOR) BUILD_INTERRUPT(reboot_interrupt,REBOOT_VECTOR) - -.irp idx,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \ - 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 -.if NUM_INVALIDATE_TLB_VECTORS > \idx -BUILD_INTERRUPT3(invalidate_interrupt\idx, - (INVALIDATE_TLB_VECTOR_START)+\idx, - smp_invalidate_interrupt) -.endif -.endr #endif BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR) -- cgit v1.2.2