diff options
Diffstat (limited to 'arch/cris')
| -rw-r--r-- | arch/cris/kernel/profile.c | 73 | ||||
| -rw-r--r-- | arch/cris/kernel/time.c | 18 |
2 files changed, 90 insertions, 1 deletions
diff --git a/arch/cris/kernel/profile.c b/arch/cris/kernel/profile.c new file mode 100644 index 0000000..69c5218 --- /dev/null +++ b/arch/cris/kernel/profile.c @@ -0,0 +1,73 @@ +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/proc_fs.h> +#include <linux/types.h> +#include <asm/ptrace.h> +#include <asm/uaccess.h> + +#define SAMPLE_BUFFER_SIZE 8192 + +static char* sample_buffer; +static char* sample_buffer_pos; +static int prof_running = 0; + +void +cris_profile_sample(struct pt_regs* regs) +{ + if (!prof_running) + return; + if (user_mode(regs)) + *(unsigned int*)sample_buffer_pos = current->pid; + else + *(unsigned int*)sample_buffer_pos = 0; + *(unsigned int*)(sample_buffer_pos + 4) = instruction_pointer(regs); + sample_buffer_pos += 8; + if (sample_buffer_pos == sample_buffer + SAMPLE_BUFFER_SIZE) + sample_buffer_pos = sample_buffer; +} + +static ssize_t +read_cris_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos) +{ + unsigned long p = *ppos; + if (p > SAMPLE_BUFFER_SIZE) + return 0; + if (p + count > SAMPLE_BUFFER_SIZE) + count = SAMPLE_BUFFER_SIZE - p; + if (copy_to_user(buf, sample_buffer + p,count)) + return -EFAULT; + memset(sample_buffer + p, 0, count); + *ppos += count; + return count; +} + +static ssize_t +write_cris_profile(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + sample_buffer_pos = sample_buffer; + memset(sample_buffer, 0, SAMPLE_BUFFER_SIZE); +} + +static struct file_operations cris_proc_profile_operations = { + .read = read_cris_profile, + .write = write_cris_profile, +}; + +static int +__init init_cris_profile(void) +{ + struct proc_dir_entry *entry; + sample_buffer = (char*)kmalloc(SAMPLE_BUFFER_SIZE, GFP_KERNEL); + sample_buffer_pos = sample_buffer; + entry = create_proc_entry("system_profile", S_IWUSR | S_IRUGO, NULL); + if (entry) { + entry->proc_fops = &cris_proc_profile_operations; + entry->size = SAMPLE_BUFFER_SIZE; + } + prof_running = 1; + return 0; +} + +__initcall(init_cris_profile); diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c index 6c28b0e..fa2d432 100644 --- a/arch/cris/kernel/time.c +++ b/arch/cris/kernel/time.c @@ -1,4 +1,4 @@ -/* $Id: time.c,v 1.14 2004/06/01 05:38:11 starvik Exp $ +/* $Id: time.c,v 1.18 2005/03/04 08:16:17 starvik Exp $ * * linux/arch/cris/kernel/time.c * @@ -30,6 +30,7 @@ #include <linux/bcd.h> #include <linux/timex.h> #include <linux/init.h> +#include <linux/profile.h> u64 jiffies_64 = INITIAL_JIFFIES; @@ -214,6 +215,21 @@ update_xtime_from_cmos(void) } } +extern void cris_profile_sample(struct pt_regs* regs); + +void +cris_do_profile(struct pt_regs* regs) +{ + +#if CONFIG_SYSTEM_PROFILER + cris_profile_sample(regs); +#endif + +#if CONFIG_PROFILING + profile_tick(CPU_PROFILING, regs); +#endif +} + /* * Scheduler clock - returns current time in nanosec units. */ |
