Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile: (21 commits)
OProfile: Fix buffer synchronization for IBS
oprofile: hotplug cpu fix
oprofile: fixing whitespaces in arch/x86/oprofile/*
oprofile: fixing whitespaces in arch/x86/oprofile/*
oprofile: fixing whitespaces in drivers/oprofile/*
x86/oprofile: add the logic for enabling additional IBS bits
x86/oprofile: reordering functions in nmi_int.c
x86/oprofile: removing unused function parameter in add_ibs_begin()
oprofile: more whitespace fixes
oprofile: whitespace fixes
OProfile: Rename IBS sysfs dir into "ibs_op"
OProfile: Rework string handling in setup_ibs_files()
OProfile: Rework oprofile_add_ibs_sample() function
oprofile: discover counters for op ppro too
oprofile: Implement Intel architectural perfmon support
oprofile: Don't report Nehalem as core_2
oprofile: drop const in num counters field
Revert "Oprofile Multiplexing Patch"
x86, oprofile: BUG: using smp_processor_id() in preemptible code
x86/oprofile: fix on_each_cpu build error
...
Manually fixed trivial conflicts in
drivers/oprofile/{cpu_buffer.c,event_buffer.h}
This commit is contained in:
Linus Torvalds
Коммит
92fb83afd6
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@ -52,8 +52,7 @@ struct frame_head {
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unsigned long ret;
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} __attribute__((packed));
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static struct frame_head *
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dump_user_backtrace(struct frame_head * head)
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static struct frame_head *dump_user_backtrace(struct frame_head *head)
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{
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struct frame_head bufhead[2];
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|
|
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@ -28,85 +28,9 @@ static struct op_x86_model_spec const *model;
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static DEFINE_PER_CPU(struct op_msrs, cpu_msrs);
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static DEFINE_PER_CPU(unsigned long, saved_lvtpc);
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static int nmi_start(void);
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static void nmi_stop(void);
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static void nmi_cpu_start(void *dummy);
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static void nmi_cpu_stop(void *dummy);
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/* 0 == registered but off, 1 == registered and on */
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static int nmi_enabled = 0;
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#ifdef CONFIG_SMP
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static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
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void *data)
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{
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int cpu = (unsigned long)data;
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switch (action) {
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case CPU_DOWN_FAILED:
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case CPU_ONLINE:
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smp_call_function_single(cpu, nmi_cpu_start, NULL, 0);
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break;
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case CPU_DOWN_PREPARE:
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smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1);
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break;
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}
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return NOTIFY_DONE;
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}
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static struct notifier_block oprofile_cpu_nb = {
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.notifier_call = oprofile_cpu_notifier
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};
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#endif
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#ifdef CONFIG_PM
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static int nmi_suspend(struct sys_device *dev, pm_message_t state)
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{
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/* Only one CPU left, just stop that one */
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if (nmi_enabled == 1)
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nmi_cpu_stop(NULL);
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return 0;
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}
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static int nmi_resume(struct sys_device *dev)
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{
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if (nmi_enabled == 1)
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nmi_cpu_start(NULL);
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return 0;
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}
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static struct sysdev_class oprofile_sysclass = {
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.name = "oprofile",
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.resume = nmi_resume,
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.suspend = nmi_suspend,
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};
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static struct sys_device device_oprofile = {
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.id = 0,
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.cls = &oprofile_sysclass,
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};
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static int __init init_sysfs(void)
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{
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int error;
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error = sysdev_class_register(&oprofile_sysclass);
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if (!error)
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error = sysdev_register(&device_oprofile);
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return error;
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}
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static void exit_sysfs(void)
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{
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sysdev_unregister(&device_oprofile);
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sysdev_class_unregister(&oprofile_sysclass);
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}
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#else
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#define init_sysfs() do { } while (0)
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#define exit_sysfs() do { } while (0)
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#endif /* CONFIG_PM */
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static int profile_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data)
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{
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@ -361,6 +285,77 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
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return 0;
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}
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#ifdef CONFIG_SMP
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static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
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void *data)
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{
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int cpu = (unsigned long)data;
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switch (action) {
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case CPU_DOWN_FAILED:
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case CPU_ONLINE:
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smp_call_function_single(cpu, nmi_cpu_start, NULL, 0);
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break;
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case CPU_DOWN_PREPARE:
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smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1);
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break;
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}
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return NOTIFY_DONE;
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}
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static struct notifier_block oprofile_cpu_nb = {
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.notifier_call = oprofile_cpu_notifier
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};
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#endif
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#ifdef CONFIG_PM
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static int nmi_suspend(struct sys_device *dev, pm_message_t state)
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{
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/* Only one CPU left, just stop that one */
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if (nmi_enabled == 1)
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nmi_cpu_stop(NULL);
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return 0;
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}
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static int nmi_resume(struct sys_device *dev)
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{
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if (nmi_enabled == 1)
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nmi_cpu_start(NULL);
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return 0;
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}
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static struct sysdev_class oprofile_sysclass = {
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.name = "oprofile",
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.resume = nmi_resume,
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.suspend = nmi_suspend,
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};
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static struct sys_device device_oprofile = {
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.id = 0,
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.cls = &oprofile_sysclass,
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};
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static int __init init_sysfs(void)
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{
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int error;
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error = sysdev_class_register(&oprofile_sysclass);
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if (!error)
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error = sysdev_register(&device_oprofile);
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return error;
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}
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static void exit_sysfs(void)
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{
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sysdev_unregister(&device_oprofile);
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sysdev_class_unregister(&oprofile_sysclass);
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}
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#else
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#define init_sysfs() do { } while (0)
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#define exit_sysfs() do { } while (0)
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#endif /* CONFIG_PM */
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static int p4force;
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module_param(p4force, int, 0);
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@ -420,9 +415,6 @@ static int __init ppro_init(char **cpu_type)
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case 15: case 23:
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*cpu_type = "i386/core_2";
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break;
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case 26:
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*cpu_type = "i386/core_2";
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break;
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default:
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/* Unknown */
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return 0;
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@ -432,6 +424,16 @@ static int __init ppro_init(char **cpu_type)
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return 1;
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}
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static int __init arch_perfmon_init(char **cpu_type)
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{
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if (!cpu_has_arch_perfmon)
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return 0;
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*cpu_type = "i386/arch_perfmon";
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model = &op_arch_perfmon_spec;
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arch_perfmon_setup_counters();
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return 1;
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}
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/* in order to get sysfs right */
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static int using_nmi;
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@ -439,7 +441,7 @@ int __init op_nmi_init(struct oprofile_operations *ops)
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{
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__u8 vendor = boot_cpu_data.x86_vendor;
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__u8 family = boot_cpu_data.x86;
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char *cpu_type;
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char *cpu_type = NULL;
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int ret = 0;
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if (!cpu_has_apic)
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@ -477,19 +479,20 @@ int __init op_nmi_init(struct oprofile_operations *ops)
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switch (family) {
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/* Pentium IV */
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case 0xf:
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if (!p4_init(&cpu_type))
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return -ENODEV;
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p4_init(&cpu_type);
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break;
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/* A P6-class processor */
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case 6:
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if (!ppro_init(&cpu_type))
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return -ENODEV;
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ppro_init(&cpu_type);
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break;
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default:
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return -ENODEV;
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break;
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}
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if (!cpu_type && !arch_perfmon_init(&cpu_type))
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return -ENODEV;
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break;
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default:
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@ -67,8 +67,9 @@ static unsigned long reset_value[NUM_COUNTERS];
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/* The function interface needs to be fixed, something like add
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data. Should then be added to linux/oprofile.h. */
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extern void oprofile_add_ibs_sample(struct pt_regs *const regs,
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unsigned int * const ibs_sample, u8 code);
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extern void
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oprofile_add_ibs_sample(struct pt_regs *const regs,
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unsigned int *const ibs_sample, int ibs_code);
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struct ibs_fetch_sample {
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/* MSRC001_1031 IBS Fetch Linear Address Register */
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@ -309,12 +310,15 @@ static void op_amd_start(struct op_msrs const * const msrs)
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#ifdef CONFIG_OPROFILE_IBS
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if (ibs_allowed && ibs_config.fetch_enabled) {
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low = (ibs_config.max_cnt_fetch >> 4) & 0xFFFF;
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high = IBS_FETCH_HIGH_ENABLE;
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high = ((ibs_config.rand_en & 0x1) << 25) /* bit 57 */
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+ IBS_FETCH_HIGH_ENABLE;
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wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
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}
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if (ibs_allowed && ibs_config.op_enabled) {
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low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF) + IBS_OP_LOW_ENABLE;
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low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF)
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+ ((ibs_config.dispatched_ops & 0x1) << 19) /* bit 19 */
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+ IBS_OP_LOW_ENABLE;
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high = 0;
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wrmsr(MSR_AMD64_IBSOPCTL, low, high);
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}
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@ -472,7 +476,6 @@ static int (*create_arch_files)(struct super_block * sb, struct dentry * root);
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static int setup_ibs_files(struct super_block *sb, struct dentry *root)
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{
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char buf[12];
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struct dentry *dir;
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int ret = 0;
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@ -494,16 +497,16 @@ static int setup_ibs_files(struct super_block * sb, struct dentry * root)
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ibs_config.max_cnt_op = 250000;
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ibs_config.op_enabled = 0;
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ibs_config.dispatched_ops = 1;
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snprintf(buf, sizeof(buf), "ibs_fetch");
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dir = oprofilefs_mkdir(sb, root, buf);
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oprofilefs_create_ulong(sb, dir, "rand_enable",
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&ibs_config.rand_en);
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dir = oprofilefs_mkdir(sb, root, "ibs_fetch");
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oprofilefs_create_ulong(sb, dir, "enable",
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&ibs_config.fetch_enabled);
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oprofilefs_create_ulong(sb, dir, "max_count",
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&ibs_config.max_cnt_fetch);
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snprintf(buf, sizeof(buf), "ibs_uops");
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dir = oprofilefs_mkdir(sb, root, buf);
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oprofilefs_create_ulong(sb, dir, "rand_enable",
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&ibs_config.rand_en);
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dir = oprofilefs_mkdir(sb, root, "ibs_op");
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oprofilefs_create_ulong(sb, dir, "enable",
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&ibs_config.op_enabled);
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oprofilefs_create_ulong(sb, dir, "max_count",
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|
|
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|
|
@ -1,32 +1,34 @@
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/*
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* @file op_model_ppro.h
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* pentium pro / P6 model-specific MSR operations
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* Family 6 perfmon and architectural perfmon MSR operations
|
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*
|
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* @remark Copyright 2002 OProfile authors
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* @remark Copyright 2008 Intel Corporation
|
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* @remark Read the file COPYING
|
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*
|
||||
* @author John Levon
|
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* @author Philippe Elie
|
||||
* @author Graydon Hoare
|
||||
* @author Andi Kleen
|
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*/
|
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|
||||
#include <linux/oprofile.h>
|
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#include <linux/slab.h>
|
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#include <asm/ptrace.h>
|
||||
#include <asm/msr.h>
|
||||
#include <asm/apic.h>
|
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#include <asm/nmi.h>
|
||||
#include <asm/intel_arch_perfmon.h>
|
||||
|
||||
#include "op_x86_model.h"
|
||||
#include "op_counter.h"
|
||||
|
||||
#define NUM_COUNTERS 2
|
||||
#define NUM_CONTROLS 2
|
||||
static int num_counters = 2;
|
||||
static int counter_width = 32;
|
||||
|
||||
#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
|
||||
#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
|
||||
#define CTR_32BIT_WRITE(l, msrs, c) \
|
||||
do {wrmsr(msrs->counters[(c)].addr, -(u32)(l), 0); } while (0)
|
||||
#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
|
||||
#define CTR_OVERFLOWED(n) (!((n) & (1U<<(counter_width-1))))
|
||||
|
||||
#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
|
||||
#define CTRL_READ(l, h, msrs, c) do {rdmsr((msrs->controls[(c)].addr), (l), (h)); } while (0)
|
||||
|
|
@ -40,20 +42,20 @@
|
|||
#define CTRL_SET_UM(val, m) (val |= (m << 8))
|
||||
#define CTRL_SET_EVENT(val, e) (val |= e)
|
||||
|
||||
static unsigned long reset_value[NUM_COUNTERS];
|
||||
static u64 *reset_value;
|
||||
|
||||
static void ppro_fill_in_addresses(struct op_msrs * const msrs)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < NUM_COUNTERS; i++) {
|
||||
for (i = 0; i < num_counters; i++) {
|
||||
if (reserve_perfctr_nmi(MSR_P6_PERFCTR0 + i))
|
||||
msrs->counters[i].addr = MSR_P6_PERFCTR0 + i;
|
||||
else
|
||||
msrs->counters[i].addr = 0;
|
||||
}
|
||||
|
||||
for (i = 0; i < NUM_CONTROLS; i++) {
|
||||
for (i = 0; i < num_counters; i++) {
|
||||
if (reserve_evntsel_nmi(MSR_P6_EVNTSEL0 + i))
|
||||
msrs->controls[i].addr = MSR_P6_EVNTSEL0 + i;
|
||||
else
|
||||
|
|
@ -67,8 +69,22 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
|
|||
unsigned int low, high;
|
||||
int i;
|
||||
|
||||
if (!reset_value) {
|
||||
reset_value = kmalloc(sizeof(unsigned) * num_counters,
|
||||
GFP_ATOMIC);
|
||||
if (!reset_value)
|
||||
return;
|
||||
}
|
||||
|
||||
if (cpu_has_arch_perfmon) {
|
||||
union cpuid10_eax eax;
|
||||
eax.full = cpuid_eax(0xa);
|
||||
if (counter_width < eax.split.bit_width)
|
||||
counter_width = eax.split.bit_width;
|
||||
}
|
||||
|
||||
/* clear all counters */
|
||||
for (i = 0 ; i < NUM_CONTROLS; ++i) {
|
||||
for (i = 0 ; i < num_counters; ++i) {
|
||||
if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
|
||||
continue;
|
||||
CTRL_READ(low, high, msrs, i);
|
||||
|
|
@ -77,18 +93,18 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
|
|||
}
|
||||
|
||||
/* avoid a false detection of ctr overflows in NMI handler */
|
||||
for (i = 0; i < NUM_COUNTERS; ++i) {
|
||||
for (i = 0; i < num_counters; ++i) {
|
||||
if (unlikely(!CTR_IS_RESERVED(msrs, i)))
|
||||
continue;
|
||||
CTR_32BIT_WRITE(1, msrs, i);
|
||||
wrmsrl(msrs->counters[i].addr, -1LL);
|
||||
}
|
||||
|
||||
/* enable active counters */
|
||||
for (i = 0; i < NUM_COUNTERS; ++i) {
|
||||
for (i = 0; i < num_counters; ++i) {
|
||||
if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
|
||||
reset_value[i] = counter_config[i].count;
|
||||
|
||||
CTR_32BIT_WRITE(counter_config[i].count, msrs, i);
|
||||
wrmsrl(msrs->counters[i].addr, -reset_value[i]);
|
||||
|
||||
CTRL_READ(low, high, msrs, i);
|
||||
CTRL_CLEAR(low);
|
||||
|
|
@ -111,13 +127,13 @@ static int ppro_check_ctrs(struct pt_regs * const regs,
|
|||
unsigned int low, high;
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < NUM_COUNTERS; ++i) {
|
||||
for (i = 0 ; i < num_counters; ++i) {
|
||||
if (!reset_value[i])
|
||||
continue;
|
||||
CTR_READ(low, high, msrs, i);
|
||||
if (CTR_OVERFLOWED(low)) {
|
||||
oprofile_add_sample(regs, i);
|
||||
CTR_32BIT_WRITE(reset_value[i], msrs, i);
|
||||
wrmsrl(msrs->counters[i].addr, -reset_value[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -141,7 +157,7 @@ static void ppro_start(struct op_msrs const * const msrs)
|
|||
unsigned int low, high;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < NUM_COUNTERS; ++i) {
|
||||
for (i = 0; i < num_counters; ++i) {
|
||||
if (reset_value[i]) {
|
||||
CTRL_READ(low, high, msrs, i);
|
||||
CTRL_SET_ACTIVE(low);
|
||||
|
|
@ -156,7 +172,7 @@ static void ppro_stop(struct op_msrs const * const msrs)
|
|||
unsigned int low, high;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < NUM_COUNTERS; ++i) {
|
||||
for (i = 0; i < num_counters; ++i) {
|
||||
if (!reset_value[i])
|
||||
continue;
|
||||
CTRL_READ(low, high, msrs, i);
|
||||
|
|
@ -169,20 +185,24 @@ static void ppro_shutdown(struct op_msrs const * const msrs)
|
|||
{
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < NUM_COUNTERS ; ++i) {
|
||||
for (i = 0 ; i < num_counters ; ++i) {
|
||||
if (CTR_IS_RESERVED(msrs, i))
|
||||
release_perfctr_nmi(MSR_P6_PERFCTR0 + i);
|
||||
}
|
||||
for (i = 0 ; i < NUM_CONTROLS ; ++i) {
|
||||
for (i = 0 ; i < num_counters ; ++i) {
|
||||
if (CTRL_IS_RESERVED(msrs, i))
|
||||
release_evntsel_nmi(MSR_P6_EVNTSEL0 + i);
|
||||
}
|
||||
if (reset_value) {
|
||||
kfree(reset_value);
|
||||
reset_value = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
struct op_x86_model_spec const op_ppro_spec = {
|
||||
.num_counters = NUM_COUNTERS,
|
||||
.num_controls = NUM_CONTROLS,
|
||||
struct op_x86_model_spec op_ppro_spec = {
|
||||
.num_counters = 2, /* can be overriden */
|
||||
.num_controls = 2, /* dito */
|
||||
.fill_in_addresses = &ppro_fill_in_addresses,
|
||||
.setup_ctrs = &ppro_setup_ctrs,
|
||||
.check_ctrs = &ppro_check_ctrs,
|
||||
|
|
@ -190,3 +210,45 @@ struct op_x86_model_spec const op_ppro_spec = {
|
|||
.stop = &ppro_stop,
|
||||
.shutdown = &ppro_shutdown
|
||||
};
|
||||
|
||||
/*
|
||||
* Architectural performance monitoring.
|
||||
*
|
||||
* Newer Intel CPUs (Core1+) have support for architectural
|
||||
* events described in CPUID 0xA. See the IA32 SDM Vol3b.18 for details.
|
||||
* The advantage of this is that it can be done without knowing about
|
||||
* the specific CPU.
|
||||
*/
|
||||
|
||||
void arch_perfmon_setup_counters(void)
|
||||
{
|
||||
union cpuid10_eax eax;
|
||||
|
||||
eax.full = cpuid_eax(0xa);
|
||||
|
||||
/* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */
|
||||
if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 &&
|
||||
current_cpu_data.x86_model == 15) {
|
||||
eax.split.version_id = 2;
|
||||
eax.split.num_counters = 2;
|
||||
eax.split.bit_width = 40;
|
||||
}
|
||||
|
||||
num_counters = eax.split.num_counters;
|
||||
|
||||
op_arch_perfmon_spec.num_counters = num_counters;
|
||||
op_arch_perfmon_spec.num_controls = num_counters;
|
||||
op_ppro_spec.num_counters = num_counters;
|
||||
op_ppro_spec.num_controls = num_counters;
|
||||
}
|
||||
|
||||
struct op_x86_model_spec op_arch_perfmon_spec = {
|
||||
/* num_counters/num_controls filled in at runtime */
|
||||
.fill_in_addresses = &ppro_fill_in_addresses,
|
||||
/* user space does the cpuid check for available events */
|
||||
.setup_ctrs = &ppro_setup_ctrs,
|
||||
.check_ctrs = &ppro_check_ctrs,
|
||||
.start = &ppro_start,
|
||||
.stop = &ppro_stop,
|
||||
.shutdown = &ppro_shutdown
|
||||
};
|
||||
|
|
|
|||
|
|
@ -34,8 +34,8 @@ struct pt_regs;
|
|||
struct op_x86_model_spec {
|
||||
int (*init)(struct oprofile_operations *ops);
|
||||
void (*exit)(void);
|
||||
unsigned int const num_counters;
|
||||
unsigned int const num_controls;
|
||||
unsigned int num_counters;
|
||||
unsigned int num_controls;
|
||||
void (*fill_in_addresses)(struct op_msrs * const msrs);
|
||||
void (*setup_ctrs)(struct op_msrs const * const msrs);
|
||||
int (*check_ctrs)(struct pt_regs * const regs,
|
||||
|
|
@ -45,9 +45,12 @@ struct op_x86_model_spec {
|
|||
void (*shutdown)(struct op_msrs const * const msrs);
|
||||
};
|
||||
|
||||
extern struct op_x86_model_spec const op_ppro_spec;
|
||||
extern struct op_x86_model_spec op_ppro_spec;
|
||||
extern struct op_x86_model_spec const op_p4_spec;
|
||||
extern struct op_x86_model_spec const op_p4_ht2_spec;
|
||||
extern struct op_x86_model_spec const op_amd_spec;
|
||||
extern struct op_x86_model_spec op_arch_perfmon_spec;
|
||||
|
||||
extern void arch_perfmon_setup_counters(void);
|
||||
|
||||
#endif /* OP_X86_MODEL_H */
|
||||
|
|
|
|||
|
|
@ -41,7 +41,6 @@ static cpumask_t marked_cpus = CPU_MASK_NONE;
|
|||
static DEFINE_SPINLOCK(task_mortuary);
|
||||
static void process_task_mortuary(void);
|
||||
|
||||
|
||||
/* Take ownership of the task struct and place it on the
|
||||
* list for processing. Only after two full buffer syncs
|
||||
* does the task eventually get freed, because by then
|
||||
|
|
@ -341,7 +340,7 @@ static void add_trace_begin(void)
|
|||
* Add IBS fetch and op entries to event buffer
|
||||
*/
|
||||
static void add_ibs_begin(struct oprofile_cpu_buffer *cpu_buf, int code,
|
||||
int in_kernel, struct mm_struct *mm)
|
||||
struct mm_struct *mm)
|
||||
{
|
||||
unsigned long rip;
|
||||
int i, count;
|
||||
|
|
@ -565,9 +564,11 @@ void sync_buffer(int cpu)
|
|||
struct task_struct *new;
|
||||
unsigned long cookie = 0;
|
||||
int in_kernel = 1;
|
||||
unsigned int i;
|
||||
sync_buffer_state state = sb_buffer_start;
|
||||
#ifndef CONFIG_OPROFILE_IBS
|
||||
unsigned int i;
|
||||
unsigned long available;
|
||||
#endif
|
||||
|
||||
mutex_lock(&buffer_mutex);
|
||||
|
||||
|
|
@ -575,9 +576,13 @@ void sync_buffer(int cpu)
|
|||
|
||||
/* Remember, only we can modify tail_pos */
|
||||
|
||||
#ifndef CONFIG_OPROFILE_IBS
|
||||
available = get_slots(cpu_buf);
|
||||
|
||||
for (i = 0; i < available; ++i) {
|
||||
#else
|
||||
while (get_slots(cpu_buf)) {
|
||||
#endif
|
||||
struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
|
||||
|
||||
if (is_code(s->eip)) {
|
||||
|
|
@ -593,12 +598,10 @@ void sync_buffer(int cpu)
|
|||
#ifdef CONFIG_OPROFILE_IBS
|
||||
} else if (s->event == IBS_FETCH_BEGIN) {
|
||||
state = sb_bt_start;
|
||||
add_ibs_begin(cpu_buf,
|
||||
IBS_FETCH_CODE, in_kernel, mm);
|
||||
add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm);
|
||||
} else if (s->event == IBS_OP_BEGIN) {
|
||||
state = sb_bt_start;
|
||||
add_ibs_begin(cpu_buf,
|
||||
IBS_OP_CODE, in_kernel, mm);
|
||||
add_ibs_begin(cpu_buf, IBS_OP_CODE, mm);
|
||||
#endif
|
||||
} else {
|
||||
struct mm_struct *oldmm = mm;
|
||||
|
|
|
|||
|
|
@ -39,7 +39,7 @@ void free_cpu_buffers(void)
|
|||
{
|
||||
int i;
|
||||
|
||||
for_each_online_cpu(i) {
|
||||
for_each_possible_cpu(i) {
|
||||
vfree(per_cpu(cpu_buffer, i).buffer);
|
||||
per_cpu(cpu_buffer, i).buffer = NULL;
|
||||
}
|
||||
|
|
@ -64,7 +64,7 @@ int alloc_cpu_buffers(void)
|
|||
|
||||
unsigned long buffer_size = fs_cpu_buffer_size;
|
||||
|
||||
for_each_online_cpu(i) {
|
||||
for_each_possible_cpu(i) {
|
||||
struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
|
||||
|
||||
b->buffer = vmalloc_node(sizeof(struct op_sample) * buffer_size,
|
||||
|
|
@ -271,20 +271,22 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
|
|||
#ifdef CONFIG_OPROFILE_IBS
|
||||
|
||||
#define MAX_IBS_SAMPLE_SIZE 14
|
||||
static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
|
||||
unsigned long pc, int is_kernel, unsigned int *ibs, int ibs_code)
|
||||
|
||||
void oprofile_add_ibs_sample(struct pt_regs *const regs,
|
||||
unsigned int *const ibs_sample, int ibs_code)
|
||||
{
|
||||
int is_kernel = !user_mode(regs);
|
||||
struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
|
||||
struct task_struct *task;
|
||||
|
||||
cpu_buf->sample_received++;
|
||||
|
||||
if (nr_available_slots(cpu_buf) < MAX_IBS_SAMPLE_SIZE) {
|
||||
/* we can't backtrace since we lost the source of this event */
|
||||
cpu_buf->sample_lost_overflow++;
|
||||
return 0;
|
||||
return;
|
||||
}
|
||||
|
||||
is_kernel = !!is_kernel;
|
||||
|
||||
/* notice a switch from user->kernel or vice versa */
|
||||
if (cpu_buf->last_is_kernel != is_kernel) {
|
||||
cpu_buf->last_is_kernel = is_kernel;
|
||||
|
|
@ -294,7 +296,6 @@ static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
|
|||
/* notice a task switch */
|
||||
if (!is_kernel) {
|
||||
task = current;
|
||||
|
||||
if (cpu_buf->last_task != task) {
|
||||
cpu_buf->last_task = task;
|
||||
add_code(cpu_buf, (unsigned long)task);
|
||||
|
|
@ -302,36 +303,17 @@ static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
|
|||
}
|
||||
|
||||
add_code(cpu_buf, ibs_code);
|
||||
add_sample(cpu_buf, ibs[0], ibs[1]);
|
||||
add_sample(cpu_buf, ibs[2], ibs[3]);
|
||||
add_sample(cpu_buf, ibs[4], ibs[5]);
|
||||
add_sample(cpu_buf, ibs_sample[0], ibs_sample[1]);
|
||||
add_sample(cpu_buf, ibs_sample[2], ibs_sample[3]);
|
||||
add_sample(cpu_buf, ibs_sample[4], ibs_sample[5]);
|
||||
|
||||
if (ibs_code == IBS_OP_BEGIN) {
|
||||
add_sample(cpu_buf, ibs[6], ibs[7]);
|
||||
add_sample(cpu_buf, ibs[8], ibs[9]);
|
||||
add_sample(cpu_buf, ibs[10], ibs[11]);
|
||||
add_sample(cpu_buf, ibs_sample[6], ibs_sample[7]);
|
||||
add_sample(cpu_buf, ibs_sample[8], ibs_sample[9]);
|
||||
add_sample(cpu_buf, ibs_sample[10], ibs_sample[11]);
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
void oprofile_add_ibs_sample(struct pt_regs *const regs,
|
||||
unsigned int * const ibs_sample, u8 code)
|
||||
{
|
||||
int is_kernel = !user_mode(regs);
|
||||
unsigned long pc = profile_pc(regs);
|
||||
|
||||
struct oprofile_cpu_buffer *cpu_buf =
|
||||
&per_cpu(cpu_buffer, smp_processor_id());
|
||||
|
||||
if (!backtrace_depth) {
|
||||
log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code);
|
||||
return;
|
||||
}
|
||||
|
||||
/* if log_sample() fails we can't backtrace since we lost the source
|
||||
* of this event */
|
||||
if (log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code))
|
||||
if (backtrace_depth)
|
||||
oprofile_ops.backtrace(regs, backtrace_depth);
|
||||
}
|
||||
|
||||
|
|
@ -381,6 +363,11 @@ static void wq_sync_buffer(struct work_struct *work)
|
|||
if (b->cpu != smp_processor_id()) {
|
||||
printk(KERN_DEBUG "WQ on CPU%d, prefer CPU%d\n",
|
||||
smp_processor_id(), b->cpu);
|
||||
|
||||
if (!cpu_online(b->cpu)) {
|
||||
cancel_delayed_work(&b->work);
|
||||
return;
|
||||
}
|
||||
}
|
||||
sync_buffer(b->cpu);
|
||||
|
||||
|
|
|
|||
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