search for: config_function_tracer

Hey, I was running some benchmarks (netserver/netperf) where the init script just launched the netserver and nothing else and was concerned to see the performance not up to par. This was an HVM guest running with PV drivers. If I compile the kernel without CONFIG_FUNCTION_TRACER it is much better - but it was my understanding that the tracing code does not impact the machine unless it is enabled. And when I inserted a bunch of print_dump_bytes I do see instructions such as e8 6a 90 60 e1 get replaced with 66 66 66 90 so I see the the instructions getting patched over. To...

...9200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Tracing the syscall inotify_init() via ftrace is not possible, because the kernel was not compiled with CONFIG_FUNCTION_TRACER. Can anyone help me? Thanks Meike

...e (0) #endif --- a/arch/nds32/mm/Makefile +++ b/arch/nds32/mm/Makefile @@ -3,7 +3,6 @@ obj-y := extable.o tlb.o fault.o init mm-nds32.o cacheflush.o proc.o obj-$(CONFIG_ALIGNMENT_TRAP) += alignment.o -obj-$(CONFIG_HIGHMEM) += highmem.o ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_proc.o = $(CC_FLAGS_FTRACE) --- a/arch/nds32/mm/highmem.c +++ /dev/null @@ -1,48 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (C) 2005-2017 Andes Technology Corporation - -#include <linux/export.h> -#include <linux/highmem.h> -#include <linux/sched.h&...

...44 arch/x86/kernel/module.lds diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index eccd0ac6bc38..b8bbcc7fad7f 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -1,6 +1,7 @@ #ifndef _ASM_X86_FTRACE_H #define _ASM_X86_FTRACE_H + #ifdef CONFIG_FUNCTION_TRACER #ifdef CC_USING_FENTRY # define MCOUNT_ADDR ((unsigned long)(__fentry__)) @@ -8,7 +9,19 @@ # define MCOUNT_ADDR ((unsigned long)(mcount)) # define HAVE_FUNCTION_GRAPH_FP_TEST #endif -#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ + +#define MCOUNT_RELINSN_SIZE 5 /* sizeof relative (call...

...ONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set CONFIG_PREEMPT_TRACER=y CONFIG_SCHED_TRACER=y CONFIG_FTRACE_SYSCALLS=y CONFIG_TRACE_BRANCH_PROFILING=y # CONFIG_BRANCH_PROFILE_NONE is not set # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set CONFIG_PROFILE_ALL_BRANCHES=y CONFIG_TRACING_BRANCHES=y CONFIG_...

...ONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set CONFIG_PREEMPT_TRACER=y CONFIG_SCHED_TRACER=y CONFIG_FTRACE_SYSCALLS=y CONFIG_TRACE_BRANCH_PROFILING=y # CONFIG_BRANCH_PROFILE_NONE is not set # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set CONFIG_PROFILE_ALL_BRANCHES=y CONFIG_TRACING_BRANCHES=y CONFIG_...

...NFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_FTRACE_SYSCALLS is not set CONFIG_TRACER_SNAPSHOT=y CONFIG_TRACE_BRANCH_PROFILING=y # CONFIG_BRANCH_PROFILE_NONE is not set # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set CONFIG_PROFILE_ALL...

...NFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_FTRACE_SYSCALLS is not set CONFIG_TRACER_SNAPSHOT=y CONFIG_TRACE_BRANCH_PROFILING=y # CONFIG_BRANCH_PROFILE_NONE is not set # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set CONFIG_PROFILE_ALL...

On 12/20/2011 10:47 PM, Stephen Rothwell wrote: > Hi all, > > Changes since 20111220: drivers/xen/xenbus/xenbus_dev_backend.c:74:2: error: implicit declaration of function ''xen_initial_domain'' Full randconfig file is attached. -- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***

...y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SYSPROF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_FTRACE_SYSCALLS is not set # CONFIG_BOOT_TRACER is not set CONFIG_BRANCH_PROFILE_NONE=y # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set # CONFIG_PROFILE_ALL_BRANCHES is not set...

...APH_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_ENABLE_DEFAULT_TRACERS is not set # CONFIG_FTRACE_SYSCALLS is not set # CONFIG_TRACER_SNAPSHOT is not set CONFIG_BRANCH_PROFILE_NONE=y # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set # CONFIG_PROFILE_ALL_BRANCHES...

...R_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_HW_BRANCH_TRACER=y CONFIG_RING_BUFFER=y CONFIG_TRACING=y # # Tracers # # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set # CONFIG_PREEMPT_TRACER is not set # CONFIG_SYSPROF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_CONTEXT_SWITCH_TRACER is not set # CONFIG_BOOT_TRACER is not set # CONFIG_TRACE_BRANCH_PROFILING is not set # CONFIG_POWER_TRACER is not set...

...R_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_HW_BRANCH_TRACER=y CONFIG_RING_BUFFER=y CONFIG_TRACING=y # # Tracers # # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set # CONFIG_PREEMPT_TRACER is not set # CONFIG_SYSPROF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_CONTEXT_SWITCH_TRACER is not set # CONFIG_BOOT_TRACER is not set # CONFIG_TRACE_BRANCH_PROFILING is not set # CONFIG_POWER_TRACER is not set...

...R_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_HW_BRANCH_TRACER=y CONFIG_RING_BUFFER=y CONFIG_TRACING=y # # Tracers # # CONFIG_FUNCTION_TRACER is not set # CONFIG_IRQSOFF_TRACER is not set # CONFIG_PREEMPT_TRACER is not set # CONFIG_SYSPROF_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_CONTEXT_SWITCH_TRACER is not set # CONFIG_BOOT_TRACER is not set # CONFIG_TRACE_BRANCH_PROFILING is not set # CONFIG_POWER_TRACER is not set...

...=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACER_MAX_TRACE=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y CONFIG_PREEMPTIRQ_TRACEPOINTS=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y CONFIG_FUNCTION_TRACER=y # CONFIG_FUNCTION_GRAPH_TRACER is not set # CONFIG_PREEMPTIRQ_EVENTS is not set # CONFIG_IRQSOFF_TRACER is not set CONFIG_SCHED_TRACER=y # CONFIG_HWLAT_TRACER is not set # CONFIG_FTRACE_SYSCALLS is not set CONFIG_TRACER_SNAPSHOT=y CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y CONFIG_BRANCH_PROFILE_NONE=y...

...TRACEPOINTS=y CONFIG_HAVE_FENTRY=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_PREEMPTIRQ_TRACEPOINTS=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y CONFIG_BOOTTIME_TRACING=y CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y CONFIG_DYNAMIC_FTRACE=y CONFIG_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y CONFIG_FUNCTION_PROFILER=y # CONFIG_STACK_TRACER is not set CONFIG_PREEMPTIRQ_EVENTS=y # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SCHED_TRACER is not set CONFIG_HWLA...

...TRACEPOINTS=y CONFIG_HAVE_FENTRY=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y CONFIG_EVENT_TRACING=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_PREEMPTIRQ_TRACEPOINTS=y CONFIG_TRACING=y CONFIG_GENERIC_TRACER=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y CONFIG_BOOTTIME_TRACING=y CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y CONFIG_DYNAMIC_FTRACE=y CONFIG_DYNAMIC_FTRACE_WITH_REGS=y CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y CONFIG_FUNCTION_PROFILER=y # CONFIG_STACK_TRACER is not set CONFIG_PREEMPTIRQ_EVENTS=y # CONFIG_IRQSOFF_TRACER is not set # CONFIG_SCHED_TRACER is not set CONFIG_HWLA...

I can''t boot my PV domU domain using a pv_ops 2.6.30.1 kernel. Using the xenified standard debian kernel (2.6.26, the same as in dom0) in DomU it does boot with pvgrub. Any clues, to what to try or test ? Regards, Sander xm dmesg gives: traps.c:437:d12 Unhandled general protection fault fault/trap [#13] on VCPU 0 [ec=0000] (XEN) domain_crash_sync called from entry.S (XEN) Domain 12

Setting the IF flag can cause an VM exit. So we should avoid touching the IF flag until absolutely necessary. This patch change the way the paravirt arch_local_irq_restore() works by checking the previous flags value and call arch_local_irq_enable() only if the IF flag was set previously. On a 32 vCPUs KVM guest running the AIM7 five-sec workload, the performance increased slightly from 302136.32

Setting the IF flag can cause an VM exit. So we should avoid touching the IF flag until absolutely necessary. This patch change the way the paravirt arch_local_irq_restore() works by checking the previous flags value and call arch_local_irq_enable() only if the IF flag was set previously. On a 32 vCPUs KVM guest running the AIM7 five-sec workload, the performance increased slightly from 302136.32