Revert "Oprofile Multiplexing Patch"
Reverting commit 1a960b402a for the main
branch. Multiplexing will be tracked on a separate feature branch.
Conflicts:
arch/x86/oprofile/nmi_int.c
This commit is contained in:
Robert Richter
Родитель
45f197ade7
Коммит
4c168eaf7e
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@ -23,18 +23,12 @@
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#include "op_counter.h"
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#include "op_x86_model.h"
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DEFINE_PER_CPU(int, switch_index);
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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_save_mpx_registers(struct op_msrs *msrs);
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static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs);
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static void nmi_cpu_stop(void *dummy);
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static void nmi_cpu_start(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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@ -87,47 +81,6 @@ static void exit_sysfs(void)
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#define exit_sysfs() do { } while (0)
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#endif /* CONFIG_PM */
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static void nmi_cpu_switch(void *dummy)
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{
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int cpu = smp_processor_id();
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int si = per_cpu(switch_index, cpu);
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struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
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nmi_cpu_stop(NULL);
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nmi_cpu_save_mpx_registers(msrs);
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/* move to next set */
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si += model->num_hardware_counters;
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if ((si > model->num_counters) || (counter_config[si].count == 0))
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per_cpu(switch_index, smp_processor_id()) = 0;
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else
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per_cpu(switch_index, smp_processor_id()) = si;
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nmi_cpu_restore_mpx_registers(msrs);
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model->setup_ctrs(msrs);
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nmi_cpu_start(NULL);
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}
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/*
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* Quick check to see if multiplexing is necessary.
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* The check should be sufficient since counters are used
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* in ordre.
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*/
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static int nmi_multiplex_on(void)
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{
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return counter_config[model->num_hardware_counters].count ? 0 : -EINVAL;
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}
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static int nmi_switch_event(void)
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{
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if (nmi_multiplex_on() < 0)
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return -EINVAL;
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on_each_cpu(nmi_cpu_switch, NULL, 1);
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return 0;
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}
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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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@ -191,10 +144,11 @@ static void free_msrs(void)
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static int allocate_msrs(void)
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{
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int i, success = 1;
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int success = 1;
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size_t controls_size = sizeof(struct op_msr) * model->num_controls;
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size_t counters_size = sizeof(struct op_msr) * model->num_counters;
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int i;
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for_each_possible_cpu(i) {
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per_cpu(cpu_msrs, i).counters = kmalloc(counters_size,
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GFP_KERNEL);
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@ -202,8 +156,8 @@ static int allocate_msrs(void)
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success = 0;
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break;
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}
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per_cpu(cpu_msrs, i).controls =
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kmalloc(controls_size, GFP_KERNEL);
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per_cpu(cpu_msrs, i).controls = kmalloc(controls_size,
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GFP_KERNEL);
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if (!per_cpu(cpu_msrs, i).controls) {
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success = 0;
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break;
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@ -247,8 +201,7 @@ static int nmi_setup(void)
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return err;
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}
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/*
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* We need to serialize save and setup for HT because the subset
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/* We need to serialize save and setup for HT because the subset
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* of msrs are distinct for save and setup operations
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*/
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@ -264,6 +217,7 @@ static int nmi_setup(void)
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per_cpu(cpu_msrs, 0).controls,
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sizeof(struct op_msr) * model->num_controls);
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}
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}
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on_each_cpu(nmi_save_registers, NULL, 1);
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on_each_cpu(nmi_cpu_setup, NULL, 1);
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@ -271,41 +225,7 @@ static int nmi_setup(void)
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return 0;
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}
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static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
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{
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unsigned int si = __get_cpu_var(switch_index);
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unsigned int const nr_ctrs = model->num_hardware_counters;
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struct op_msr *counters = &msrs->counters[si];
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unsigned int i;
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for (i = 0; i < nr_ctrs; ++i) {
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int offset = i + si;
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if (counters[offset].addr) {
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rdmsr(counters[offset].addr,
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counters[offset].multiplex.low,
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counters[offset].multiplex.high);
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}
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}
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}
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static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
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{
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unsigned int si = __get_cpu_var(switch_index);
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unsigned int const nr_ctrs = model->num_hardware_counters;
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struct op_msr *counters = &msrs->counters[si];
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unsigned int i;
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for (i = 0; i < nr_ctrs; ++i) {
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int offset = i + si;
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if (counters[offset].addr) {
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wrmsr(counters[offset].addr,
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counters[offset].multiplex.low,
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counters[offset].multiplex.high);
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}
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}
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}
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static void nmi_cpu_restore_registers(struct op_msrs *msrs)
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static void nmi_restore_registers(struct op_msrs *msrs)
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{
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unsigned int const nr_ctrs = model->num_counters;
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unsigned int const nr_ctrls = model->num_controls;
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@ -345,8 +265,7 @@ static void nmi_cpu_shutdown(void *dummy)
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apic_write(APIC_LVTERR, v | APIC_LVT_MASKED);
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apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu));
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apic_write(APIC_LVTERR, v);
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nmi_cpu_restore_registers(msrs);
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__get_cpu_var(switch_index) = 0;
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nmi_restore_registers(msrs);
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}
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static void nmi_shutdown(void)
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@ -409,7 +328,6 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
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oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
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oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
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oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
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counter_config[i].save_count_low = 0;
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}
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return 0;
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@ -551,14 +469,12 @@ int __init op_nmi_init(struct oprofile_operations *ops)
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}
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/* default values, can be overwritten by model */
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__raw_get_cpu_var(switch_index) = 0;
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ops->create_files = nmi_create_files;
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ops->setup = nmi_setup;
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ops->shutdown = nmi_shutdown;
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ops->start = nmi_start;
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ops->stop = nmi_stop;
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ops->cpu_type = cpu_type;
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ops->switch_events = nmi_switch_event;
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if (model->init)
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ret = model->init(ops);
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@ -10,14 +10,13 @@
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#ifndef OP_COUNTER_H
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#define OP_COUNTER_H
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#define OP_MAX_COUNTER 32
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#define OP_MAX_COUNTER 8
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/* Per-perfctr configuration as set via
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* oprofilefs.
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*/
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struct op_counter_config {
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unsigned long count;
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unsigned long save_count_low;
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unsigned long enabled;
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unsigned long event;
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unsigned long kernel;
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@ -15,7 +15,6 @@
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#include <linux/oprofile.h>
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#include <linux/device.h>
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#include <linux/pci.h>
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#include <linux/percpu.h>
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#include <asm/ptrace.h>
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#include <asm/msr.h>
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@ -24,10 +23,8 @@
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#include "op_x86_model.h"
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#include "op_counter.h"
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#define NUM_COUNTERS 32
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#define NUM_HARDWARE_COUNTERS 4
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#define NUM_CONTROLS 32
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#define NUM_HARDWARE_CONTROLS 4
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#define NUM_COUNTERS 4
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#define NUM_CONTROLS 4
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#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
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#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
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@ -51,7 +48,6 @@
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#define CTRL_SET_GUEST_ONLY(val, h) (val |= ((h & 1) << 8))
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static unsigned long reset_value[NUM_COUNTERS];
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DECLARE_PER_CPU(int, switch_index);
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#ifdef CONFIG_OPROFILE_IBS
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@ -134,17 +130,15 @@ static void op_amd_fill_in_addresses(struct op_msrs * const msrs)
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int i;
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for (i = 0; i < NUM_COUNTERS; i++) {
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int hw_counter = i % NUM_HARDWARE_COUNTERS;
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if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + hw_counter))
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msrs->counters[i].addr = MSR_K7_PERFCTR0 + hw_counter;
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if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
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msrs->counters[i].addr = MSR_K7_PERFCTR0 + i;
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else
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msrs->counters[i].addr = 0;
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}
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for (i = 0; i < NUM_CONTROLS; i++) {
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int hw_control = i % NUM_HARDWARE_CONTROLS;
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if (reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + hw_control))
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msrs->controls[i].addr = MSR_K7_EVNTSEL0 + hw_control;
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if (reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i))
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msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i;
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else
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msrs->controls[i].addr = 0;
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}
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@ -156,16 +150,8 @@ static void op_amd_setup_ctrs(struct op_msrs const * const msrs)
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unsigned int low, high;
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int i;
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for (i = 0; i < NUM_HARDWARE_CONTROLS; ++i) {
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int offset = i + __get_cpu_var(switch_index);
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if (counter_config[offset].enabled)
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reset_value[offset] = counter_config[offset].count;
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else
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reset_value[offset] = 0;
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}
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/* clear all counters */
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for (i = 0 ; i < NUM_HARDWARE_CONTROLS; ++i) {
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for (i = 0 ; i < NUM_CONTROLS; ++i) {
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if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
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continue;
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CTRL_READ(low, high, msrs, i);
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@ -175,31 +161,34 @@ static void op_amd_setup_ctrs(struct op_msrs const * const msrs)
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}
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/* avoid a false detection of ctr overflows in NMI handler */
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for (i = 0; i < NUM_HARDWARE_COUNTERS; ++i) {
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for (i = 0; i < NUM_COUNTERS; ++i) {
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if (unlikely(!CTR_IS_RESERVED(msrs, i)))
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continue;
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CTR_WRITE(1, msrs, i);
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}
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/* enable active counters */
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for (i = 0; i < NUM_HARDWARE_COUNTERS; ++i) {
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int offset = i + __get_cpu_var(switch_index);
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if ((counter_config[offset].enabled) && (CTR_IS_RESERVED(msrs, i))) {
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CTR_WRITE(counter_config[offset].count, msrs, i);
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for (i = 0; i < NUM_COUNTERS; ++i) {
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if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
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reset_value[i] = counter_config[i].count;
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CTR_WRITE(counter_config[i].count, msrs, i);
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CTRL_READ(low, high, msrs, i);
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CTRL_CLEAR_LO(low);
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CTRL_CLEAR_HI(high);
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CTRL_SET_ENABLE(low);
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CTRL_SET_USR(low, counter_config[offset].user);
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CTRL_SET_KERN(low, counter_config[offset].kernel);
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CTRL_SET_UM(low, counter_config[offset].unit_mask);
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CTRL_SET_EVENT_LOW(low, counter_config[offset].event);
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CTRL_SET_EVENT_HIGH(high, counter_config[offset].event);
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CTRL_SET_USR(low, counter_config[i].user);
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CTRL_SET_KERN(low, counter_config[i].kernel);
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CTRL_SET_UM(low, counter_config[i].unit_mask);
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CTRL_SET_EVENT_LOW(low, counter_config[i].event);
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CTRL_SET_EVENT_HIGH(high, counter_config[i].event);
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CTRL_SET_HOST_ONLY(high, 0);
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CTRL_SET_GUEST_ONLY(high, 0);
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CTRL_WRITE(low, high, msrs, i);
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} else {
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reset_value[i] = 0;
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}
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}
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}
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@ -287,14 +276,13 @@ static int op_amd_check_ctrs(struct pt_regs * const regs,
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unsigned int low, high;
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int i;
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for (i = 0 ; i < NUM_HARDWARE_COUNTERS ; ++i) {
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int offset = i + __get_cpu_var(switch_index);
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if (!reset_value[offset])
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for (i = 0 ; i < NUM_COUNTERS; ++i) {
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if (!reset_value[i])
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continue;
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CTR_READ(low, high, msrs, i);
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if (CTR_OVERFLOWED(low)) {
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oprofile_add_sample(regs, offset);
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CTR_WRITE(reset_value[offset], msrs, i);
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oprofile_add_sample(regs, i);
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CTR_WRITE(reset_value[i], msrs, i);
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}
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}
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@ -310,10 +298,8 @@ static void op_amd_start(struct op_msrs const * const msrs)
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{
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unsigned int low, high;
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int i;
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for (i = 0 ; i < NUM_HARDWARE_COUNTERS ; ++i) {
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int offset = i + __get_cpu_var(switch_index);
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if (reset_value[offset]) {
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for (i = 0 ; i < NUM_COUNTERS ; ++i) {
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if (reset_value[i]) {
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CTRL_READ(low, high, msrs, i);
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CTRL_SET_ACTIVE(low);
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CTRL_WRITE(low, high, msrs, i);
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@ -343,8 +329,8 @@ static void op_amd_stop(struct op_msrs const * const msrs)
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/* Subtle: stop on all counters to avoid race with
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* setting our pm callback */
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for (i = 0 ; i < NUM_HARDWARE_COUNTERS ; ++i) {
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if (!reset_value[i + per_cpu(switch_index, smp_processor_id())])
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for (i = 0 ; i < NUM_COUNTERS ; ++i) {
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if (!reset_value[i])
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continue;
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CTRL_READ(low, high, msrs, i);
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CTRL_SET_INACTIVE(low);
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@ -370,11 +356,11 @@ static void op_amd_shutdown(struct op_msrs const * const msrs)
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{
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int i;
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for (i = 0 ; i < NUM_HARDWARE_COUNTERS ; ++i) {
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for (i = 0 ; i < NUM_COUNTERS ; ++i) {
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if (CTR_IS_RESERVED(msrs, i))
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release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
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}
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for (i = 0 ; i < NUM_HARDWARE_COUNTERS ; ++i) {
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for (i = 0 ; i < NUM_CONTROLS ; ++i) {
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if (CTRL_IS_RESERVED(msrs, i))
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release_evntsel_nmi(MSR_K7_EVNTSEL0 + i);
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}
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@ -548,8 +534,6 @@ struct op_x86_model_spec const op_amd_spec = {
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.exit = op_amd_exit,
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.num_counters = NUM_COUNTERS,
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.num_controls = NUM_CONTROLS,
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.num_hardware_counters = NUM_HARDWARE_COUNTERS,
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.num_hardware_controls = NUM_HARDWARE_CONTROLS,
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.fill_in_addresses = &op_amd_fill_in_addresses,
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.setup_ctrs = &op_amd_setup_ctrs,
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.check_ctrs = &op_amd_check_ctrs,
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@ -700,8 +700,6 @@ static void p4_shutdown(struct op_msrs const * const msrs)
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struct op_x86_model_spec const op_p4_ht2_spec = {
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.num_counters = NUM_COUNTERS_HT2,
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.num_controls = NUM_CONTROLS_HT2,
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.num_hardware_counters = NUM_COUNTERS_HT2,
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.num_hardware_controls = NUM_CONTROLS_HT2,
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.fill_in_addresses = &p4_fill_in_addresses,
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.setup_ctrs = &p4_setup_ctrs,
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.check_ctrs = &p4_check_ctrs,
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@ -714,8 +712,6 @@ struct op_x86_model_spec const op_p4_ht2_spec = {
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struct op_x86_model_spec const op_p4_spec = {
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.num_counters = NUM_COUNTERS_NON_HT,
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.num_controls = NUM_CONTROLS_NON_HT,
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.num_hardware_counters = NUM_COUNTERS_NON_HT,
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.num_hardware_controls = NUM_CONTROLS_NON_HT,
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.fill_in_addresses = &p4_fill_in_addresses,
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.setup_ctrs = &p4_setup_ctrs,
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.check_ctrs = &p4_check_ctrs,
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|
|
|||
|
|
@ -183,8 +183,6 @@ static void ppro_shutdown(struct op_msrs const * const msrs)
|
|||
struct op_x86_model_spec const op_ppro_spec = {
|
||||
.num_counters = NUM_COUNTERS,
|
||||
.num_controls = NUM_CONTROLS,
|
||||
.num_hardware_counters = NUM_COUNTERS,
|
||||
.num_hardware_controls = NUM_CONTROLS,
|
||||
.fill_in_addresses = &ppro_fill_in_addresses,
|
||||
.setup_ctrs = &ppro_setup_ctrs,
|
||||
.check_ctrs = &ppro_check_ctrs,
|
||||
|
|
|
|||
|
|
@ -19,7 +19,6 @@ struct op_saved_msr {
|
|||
struct op_msr {
|
||||
unsigned long addr;
|
||||
struct op_saved_msr saved;
|
||||
struct op_saved_msr multiplex;
|
||||
};
|
||||
|
||||
struct op_msrs {
|
||||
|
|
@ -35,8 +34,6 @@ struct pt_regs;
|
|||
struct op_x86_model_spec {
|
||||
int (*init)(struct oprofile_operations *ops);
|
||||
void (*exit)(void);
|
||||
unsigned int const num_hardware_counters;
|
||||
unsigned int const num_hardware_controls;
|
||||
unsigned int const num_counters;
|
||||
unsigned int const num_controls;
|
||||
void (*fill_in_addresses)(struct op_msrs * const msrs);
|
||||
|
|
|
|||
|
|
@ -12,8 +12,6 @@
|
|||
#include <linux/init.h>
|
||||
#include <linux/oprofile.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/time.h>
|
||||
#include <asm/mutex.h>
|
||||
|
||||
#include "oprof.h"
|
||||
|
|
@ -21,18 +19,13 @@
|
|||
#include "cpu_buffer.h"
|
||||
#include "buffer_sync.h"
|
||||
#include "oprofile_stats.h"
|
||||
|
||||
static unsigned long is_setup;
|
||||
static void switch_worker(struct work_struct *work);
|
||||
static DECLARE_DELAYED_WORK(switch_work, switch_worker);
|
||||
static DEFINE_MUTEX(start_mutex);
|
||||
|
||||
struct oprofile_operations oprofile_ops;
|
||||
|
||||
unsigned long timeout_jiffies;
|
||||
unsigned long oprofile_started;
|
||||
unsigned long backtrace_depth;
|
||||
/* Multiplexing defaults at 1 msec*/
|
||||
static unsigned long is_setup;
|
||||
static DEFINE_MUTEX(start_mutex);
|
||||
|
||||
/* timer
|
||||
0 - use performance monitoring hardware if available
|
||||
|
|
@ -94,16 +87,6 @@ out:
|
|||
return err;
|
||||
}
|
||||
|
||||
static void start_switch_worker(void)
|
||||
{
|
||||
schedule_delayed_work(&switch_work, timeout_jiffies);
|
||||
}
|
||||
|
||||
static void switch_worker(struct work_struct *work)
|
||||
{
|
||||
if (!oprofile_ops.switch_events())
|
||||
start_switch_worker();
|
||||
}
|
||||
|
||||
/* Actually start profiling (echo 1>/dev/oprofile/enable) */
|
||||
int oprofile_start(void)
|
||||
|
|
@ -111,6 +94,7 @@ int oprofile_start(void)
|
|||
int err = -EINVAL;
|
||||
|
||||
mutex_lock(&start_mutex);
|
||||
|
||||
if (!is_setup)
|
||||
goto out;
|
||||
|
||||
|
|
@ -124,9 +108,6 @@ int oprofile_start(void)
|
|||
if ((err = oprofile_ops.start()))
|
||||
goto out;
|
||||
|
||||
if (oprofile_ops.switch_events)
|
||||
start_switch_worker();
|
||||
|
||||
oprofile_started = 1;
|
||||
out:
|
||||
mutex_unlock(&start_mutex);
|
||||
|
|
@ -142,7 +123,6 @@ void oprofile_stop(void)
|
|||
goto out;
|
||||
oprofile_ops.stop();
|
||||
oprofile_started = 0;
|
||||
cancel_delayed_work_sync(&switch_work);
|
||||
/* wake up the daemon to read what remains */
|
||||
wake_up_buffer_waiter();
|
||||
out:
|
||||
|
|
@ -175,32 +155,6 @@ post_sync:
|
|||
mutex_unlock(&start_mutex);
|
||||
}
|
||||
|
||||
/* User inputs in ms, converts to jiffies */
|
||||
int oprofile_set_timeout(unsigned long val_msec)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
mutex_lock(&start_mutex);
|
||||
|
||||
if (oprofile_started) {
|
||||
err = -EBUSY;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!oprofile_ops.switch_events) {
|
||||
err = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
timeout_jiffies = msecs_to_jiffies(val_msec);
|
||||
if (timeout_jiffies == MAX_JIFFY_OFFSET)
|
||||
timeout_jiffies = msecs_to_jiffies(1);
|
||||
|
||||
out:
|
||||
mutex_unlock(&start_mutex);
|
||||
return err;
|
||||
|
||||
}
|
||||
|
||||
int oprofile_set_backtrace(unsigned long val)
|
||||
{
|
||||
|
|
@ -225,16 +179,10 @@ out:
|
|||
return err;
|
||||
}
|
||||
|
||||
static void __init oprofile_switch_timer_init(void)
|
||||
{
|
||||
timeout_jiffies = msecs_to_jiffies(1);
|
||||
}
|
||||
|
||||
static int __init oprofile_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
oprofile_switch_timer_init();
|
||||
err = oprofile_arch_init(&oprofile_ops);
|
||||
|
||||
if (err < 0 || timer) {
|
||||
|
|
|
|||
|
|
@ -27,8 +27,7 @@ extern unsigned long fs_buffer_watershed;
|
|||
extern struct oprofile_operations oprofile_ops;
|
||||
extern unsigned long oprofile_started;
|
||||
extern unsigned long backtrace_depth;
|
||||
extern unsigned long timeout_jiffies;
|
||||
|
||||
|
||||
struct super_block;
|
||||
struct dentry;
|
||||
|
||||
|
|
@ -36,6 +35,5 @@ void oprofile_create_files(struct super_block * sb, struct dentry * root);
|
|||
void oprofile_timer_init(struct oprofile_operations * ops);
|
||||
|
||||
int oprofile_set_backtrace(unsigned long depth);
|
||||
int oprofile_set_timeout(unsigned long time);
|
||||
|
||||
#endif /* OPROF_H */
|
||||
|
|
|
|||
|
|
@ -9,7 +9,6 @@
|
|||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/oprofile.h>
|
||||
#include <linux/jiffies.h>
|
||||
|
||||
#include "event_buffer.h"
|
||||
#include "oprofile_stats.h"
|
||||
|
|
@ -19,40 +18,6 @@ unsigned long fs_buffer_size = 131072;
|
|||
unsigned long fs_cpu_buffer_size = 8192;
|
||||
unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
|
||||
|
||||
static ssize_t timeout_read(struct file *file, char __user *buf,
|
||||
size_t count, loff_t *offset)
|
||||
{
|
||||
return oprofilefs_ulong_to_user(jiffies_to_msecs(timeout_jiffies),
|
||||
buf, count, offset);
|
||||
}
|
||||
|
||||
|
||||
static ssize_t timeout_write(struct file *file, char const __user *buf,
|
||||
size_t count, loff_t *offset)
|
||||
{
|
||||
unsigned long val;
|
||||
int retval;
|
||||
|
||||
if (*offset)
|
||||
return -EINVAL;
|
||||
|
||||
retval = oprofilefs_ulong_from_user(&val, buf, count);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
retval = oprofile_set_timeout(val);
|
||||
|
||||
if (retval)
|
||||
return retval;
|
||||
return count;
|
||||
}
|
||||
|
||||
static const struct file_operations timeout_fops = {
|
||||
.read = timeout_read,
|
||||
.write = timeout_write,
|
||||
};
|
||||
|
||||
|
||||
static ssize_t depth_read(struct file * file, char __user * buf, size_t count, loff_t * offset)
|
||||
{
|
||||
return oprofilefs_ulong_to_user(backtrace_depth, buf, count, offset);
|
||||
|
|
@ -120,10 +85,11 @@ static ssize_t enable_write(struct file * file, char const __user * buf, size_t
|
|||
|
||||
if (*offset)
|
||||
return -EINVAL;
|
||||
|
||||
retval = oprofilefs_ulong_from_user(&val, buf, count);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
|
||||
if (val)
|
||||
retval = oprofile_start();
|
||||
else
|
||||
|
|
@ -163,7 +129,6 @@ void oprofile_create_files(struct super_block * sb, struct dentry * root)
|
|||
oprofilefs_create_file(sb, root, "cpu_type", &cpu_type_fops);
|
||||
oprofilefs_create_file(sb, root, "backtrace_depth", &depth_fops);
|
||||
oprofilefs_create_file(sb, root, "pointer_size", &pointer_size_fops);
|
||||
oprofilefs_create_file(sb, root, "timeout_ms", &timeout_fops);
|
||||
oprofile_create_stats_files(sb, root);
|
||||
if (oprofile_ops.create_files)
|
||||
oprofile_ops.create_files(sb, root);
|
||||
|
|
|
|||
|
|
@ -67,9 +67,6 @@ struct oprofile_operations {
|
|||
|
||||
/* Initiate a stack backtrace. Optional. */
|
||||
void (*backtrace)(struct pt_regs * const regs, unsigned int depth);
|
||||
|
||||
/* Multiplex between different events. Optional. */
|
||||
int (*switch_events)(void);
|
||||
/* CPU identification string. */
|
||||
char * cpu_type;
|
||||
};
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче