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Merge branch 'core' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/urgent

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This commit is contained in:
Ingo Molnar 2011-03-17 13:38:41 +01:00
commit 8df341cf25
7 changed files with 1558 additions and 13 deletions
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2
arch/s390/oprofile/Makefile
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@ -6,4 +6,4 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
oprofilefs.o oprofile_stats.o \
timer_int.o )
oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
oprofile-y := $(DRIVER_OBJS) init.o backtrace.o hwsampler.o

1256
arch/s390/oprofile/hwsampler.c Normal file
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113
arch/s390/oprofile/hwsampler.h Normal file
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@ -0,0 +1,113 @@
/*
* CPUMF HW sampler functions and internal structures
*
* Copyright IBM Corp. 2010
* Author(s): Heinz Graalfs <graalfs@de.ibm.com>
*/
#ifndef HWSAMPLER_H_
#define HWSAMPLER_H_
#include <linux/workqueue.h>
struct hws_qsi_info_block /* QUERY SAMPLING information block */
{ /* Bit(s) */
unsigned int b0_13:14; /* 0-13: zeros */
unsigned int as:1; /* 14: sampling authorisation control*/
unsigned int b15_21:7; /* 15-21: zeros */
unsigned int es:1; /* 22: sampling enable control */
unsigned int b23_29:7; /* 23-29: zeros */
unsigned int cs:1; /* 30: sampling activation control */
unsigned int:1; /* 31: reserved */
unsigned int bsdes:16; /* 4-5: size of sampling entry */
unsigned int:16; /* 6-7: reserved */
unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
unsigned long tear; /* 24-31: TEAR contents */
unsigned long dear; /* 32-39: DEAR contents */
unsigned int rsvrd0; /* 40-43: reserved */
unsigned int cpu_speed; /* 44-47: CPU speed */
unsigned long long rsvrd1; /* 48-55: reserved */
unsigned long long rsvrd2; /* 56-63: reserved */
};
struct hws_ssctl_request_block /* SET SAMPLING CONTROLS req block */
{ /* bytes 0 - 7 Bit(s) */
unsigned int s:1; /* 0: maximum buffer indicator */
unsigned int h:1; /* 1: part. level reserved for VM use*/
unsigned long b2_53:52; /* 2-53: zeros */
unsigned int es:1; /* 54: sampling enable control */
unsigned int b55_61:7; /* 55-61: - zeros */
unsigned int cs:1; /* 62: sampling activation control */
unsigned int b63:1; /* 63: zero */
unsigned long interval; /* 8-15: sampling interval */
unsigned long tear; /* 16-23: TEAR contents */
unsigned long dear; /* 24-31: DEAR contents */
/* 32-63: */
unsigned long rsvrd1; /* reserved */
unsigned long rsvrd2; /* reserved */
unsigned long rsvrd3; /* reserved */
unsigned long rsvrd4; /* reserved */
};
struct hws_cpu_buffer {
unsigned long first_sdbt; /* @ of 1st SDB-Table for this CP*/
unsigned long worker_entry;
unsigned long sample_overflow; /* taken from SDB ... */
struct hws_qsi_info_block qsi;
struct hws_ssctl_request_block ssctl;
struct work_struct worker;
atomic_t ext_params;
unsigned long req_alert;
unsigned long loss_of_sample_data;
unsigned long invalid_entry_address;
unsigned long incorrect_sdbt_entry;
unsigned long sample_auth_change_alert;
unsigned int finish:1;
unsigned int oom:1;
unsigned int stop_mode:1;
};
struct hws_data_entry {
unsigned int def:16; /* 0-15 Data Entry Format */
unsigned int R:4; /* 16-19 reserved */
unsigned int U:4; /* 20-23 Number of unique instruct. */
unsigned int z:2; /* zeros */
unsigned int T:1; /* 26 PSW DAT mode */
unsigned int W:1; /* 27 PSW wait state */
unsigned int P:1; /* 28 PSW Problem state */
unsigned int AS:2; /* 29-30 PSW address-space control */
unsigned int I:1; /* 31 entry valid or invalid */
unsigned int:16;
unsigned int prim_asn:16; /* primary ASN */
unsigned long long ia; /* Instruction Address */
unsigned long long lpp; /* Logical-Partition Program Param. */
unsigned long long vpp; /* Virtual-Machine Program Param. */
};
struct hws_trailer_entry {
unsigned int f:1; /* 0 - Block Full Indicator */
unsigned int a:1; /* 1 - Alert request control */
unsigned long:62; /* 2 - 63: Reserved */
unsigned long overflow; /* 64 - sample Overflow count */
unsigned long timestamp; /* 16 - time-stamp */
unsigned long timestamp1; /* */
unsigned long reserved1; /* 32 -Reserved */
unsigned long reserved2; /* */
unsigned long progusage1; /* 48 - reserved for programming use */
unsigned long progusage2; /* */
};
int hwsampler_setup(void);
int hwsampler_shutdown(void);
int hwsampler_allocate(unsigned long sdbt, unsigned long sdb);
int hwsampler_deallocate(void);
long hwsampler_query_min_interval(void);
long hwsampler_query_max_interval(void);
int hwsampler_start_all(unsigned long interval);
int hwsampler_stop_all(void);
int hwsampler_deactivate(unsigned int cpu);
int hwsampler_activate(unsigned int cpu);
unsigned long hwsampler_get_sample_overflow_count(unsigned int cpu);
#endif /*HWSAMPLER_H_*/

165
arch/s390/oprofile/init.c
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@ -4,23 +4,182 @@
* S390 Version
* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Thomas Spatzier (tspat@de.ibm.com)
* Author(s): Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com)
* Author(s): Heinz Graalfs (graalfs@linux.vnet.ibm.com)
*
* @remark Copyright 2002 OProfile authors
* @remark Copyright 2002-2011 OProfile authors
*/
#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/oprofile.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include "../../../drivers/oprofile/oprof.h"
#include "hwsampler.h"
#define DEFAULT_INTERVAL 4096
#define DEFAULT_SDBT_BLOCKS 1
#define DEFAULT_SDB_BLOCKS 511
static unsigned long oprofile_hw_interval = DEFAULT_INTERVAL;
static unsigned long oprofile_min_interval;
static unsigned long oprofile_max_interval;
static unsigned long oprofile_sdbt_blocks = DEFAULT_SDBT_BLOCKS;
static unsigned long oprofile_sdb_blocks = DEFAULT_SDB_BLOCKS;
static int hwsampler_file;
static int hwsampler_running; /* start_mutex must be held to change */
static struct oprofile_operations timer_ops;
extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth);
int __init oprofile_arch_init(struct oprofile_operations* ops)
static int oprofile_hwsampler_start(void)
{
int retval;
hwsampler_running = hwsampler_file;
if (!hwsampler_running)
return timer_ops.start();
retval = hwsampler_allocate(oprofile_sdbt_blocks, oprofile_sdb_blocks);
if (retval)
return retval;
retval = hwsampler_start_all(oprofile_hw_interval);
if (retval)
hwsampler_deallocate();
return retval;
}
static void oprofile_hwsampler_stop(void)
{
if (!hwsampler_running) {
timer_ops.stop();
return;
}
hwsampler_stop_all();
hwsampler_deallocate();
return;
}
static ssize_t hwsampler_read(struct file *file, char __user *buf,
size_t count, loff_t *offset)
{
return oprofilefs_ulong_to_user(hwsampler_file, buf, count, offset);
}
static ssize_t hwsampler_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;
if (oprofile_started)
/*
* save to do without locking as we set
* hwsampler_running in start() when start_mutex is
* held
*/
return -EBUSY;
hwsampler_file = val;
return count;
}
static const struct file_operations hwsampler_fops = {
.read = hwsampler_read,
.write = hwsampler_write,
};
static int oprofile_create_hwsampling_files(struct super_block *sb,
struct dentry *root)
{
struct dentry *hw_dir;
/* reinitialize default values */
hwsampler_file = 1;
hw_dir = oprofilefs_mkdir(sb, root, "hwsampling");
if (!hw_dir)
return -EINVAL;
oprofilefs_create_file(sb, hw_dir, "hwsampler", &hwsampler_fops);
oprofilefs_create_ulong(sb, hw_dir, "hw_interval",
&oprofile_hw_interval);
oprofilefs_create_ro_ulong(sb, hw_dir, "hw_min_interval",
&oprofile_min_interval);
oprofilefs_create_ro_ulong(sb, hw_dir, "hw_max_interval",
&oprofile_max_interval);
oprofilefs_create_ulong(sb, hw_dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
return 0;
}
static int oprofile_hwsampler_init(struct oprofile_operations *ops)
{
if (hwsampler_setup())
return -ENODEV;
/*
* create hwsampler files only if hwsampler_setup() succeeds.
*/
oprofile_min_interval = hwsampler_query_min_interval();
if (oprofile_min_interval < 0) {
oprofile_min_interval = 0;
return -ENODEV;
}
oprofile_max_interval = hwsampler_query_max_interval();
if (oprofile_max_interval < 0) {
oprofile_max_interval = 0;
return -ENODEV;
}
if (oprofile_timer_init(ops))
return -ENODEV;
printk(KERN_INFO "oprofile: using hardware sampling\n");
memcpy(&timer_ops, ops, sizeof(timer_ops));
ops->start = oprofile_hwsampler_start;
ops->stop = oprofile_hwsampler_stop;
ops->create_files = oprofile_create_hwsampling_files;
return 0;
}
static void oprofile_hwsampler_exit(void)
{
oprofile_timer_exit();
hwsampler_shutdown();
}
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
ops->backtrace = s390_backtrace;
return -ENODEV;
return oprofile_hwsampler_init(ops);
}
void oprofile_arch_exit(void)
{
oprofile_hwsampler_exit();
}

24
drivers/oprofile/cpu_buffer.c
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@ -258,8 +258,10 @@ op_add_sample(struct oprofile_cpu_buffer *cpu_buf,
*/
static int
log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
unsigned long backtrace, int is_kernel, unsigned long event)
unsigned long backtrace, int is_kernel, unsigned long event,
struct task_struct *task)
{
struct task_struct *tsk = task ? task : current;
cpu_buf->sample_received++;
if (pc == ESCAPE_CODE) {
@ -267,7 +269,7 @@ log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
return 0;
}
if (op_add_code(cpu_buf, backtrace, is_kernel, current))
if (op_add_code(cpu_buf, backtrace, is_kernel, tsk))
goto fail;
if (op_add_sample(cpu_buf, pc, event))
@ -292,7 +294,8 @@ static inline void oprofile_end_trace(struct oprofile_cpu_buffer *cpu_buf)
static inline void
__oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel)
unsigned long event, int is_kernel,
struct task_struct *task)
{
struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
unsigned long backtrace = oprofile_backtrace_depth;
@ -301,7 +304,7 @@ __oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
* if log_sample() fail we can't backtrace since we lost the
* source of this event
*/
if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event))
if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event, task))
/* failed */
return;
@ -313,10 +316,17 @@ __oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
oprofile_end_trace(cpu_buf);
}
void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel,
struct task_struct *task)
{
__oprofile_add_ext_sample(pc, regs, event, is_kernel, task);
}
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel)
{
__oprofile_add_ext_sample(pc, regs, event, is_kernel);
__oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
}
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
@ -332,7 +342,7 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
pc = ESCAPE_CODE; /* as this causes an early return. */
}
__oprofile_add_ext_sample(pc, regs, event, is_kernel);
__oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
}
/*
@ -403,7 +413,7 @@ int oprofile_write_commit(struct op_entry *entry)
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
{
struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
log_sample(cpu_buf, pc, 0, is_kernel, event);
log_sample(cpu_buf, pc, 0, is_kernel, event, NULL);
}
void oprofile_add_trace(unsigned long pc)

4
drivers/oprofile/timer_int.c
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@ -97,7 +97,7 @@ static struct notifier_block __refdata oprofile_cpu_notifier = {
.notifier_call = oprofile_cpu_notify,
};
int __init oprofile_timer_init(struct oprofile_operations *ops)
int oprofile_timer_init(struct oprofile_operations *ops)
{
int rc;
@ -113,7 +113,7 @@ int __init oprofile_timer_init(struct oprofile_operations *ops)
return 0;
}
void __exit oprofile_timer_exit(void)
void oprofile_timer_exit(void)
{
unregister_hotcpu_notifier(&oprofile_cpu_notifier);
}

7
include/linux/oprofile.h
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@ -106,6 +106,13 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event);
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel);
/**
* Add an hardware sample.
*/
void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel,
struct task_struct *task);
/* Use this instead when the PC value is not from the regs. Doesn't
* backtrace. */
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event);