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| author | Robert Richter <robert.richter@amd.com> | 2008-09-26 17:50:31 -0400 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2008-12-10 14:20:09 +0100 |
| commit | fd7826d56bde11ab142d2431093773ad2b3f0a59 (patch) | |
| tree | 35f84fb4a49fbbec86fba399181cbac015e9e3f9 /drivers/oprofile/buffer_sync.c | |
| parent | fe615cbf34fc6a1c53c359417da4696328a488ed (diff) | |
| download | linux-fd7826d56bde11ab142d2431093773ad2b3f0a59.tar.bz2 | |
oprofile: implement switch/case in buffer_sync.c
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile/buffer_sync.c')
| -rw-r--r-- | drivers/oprofile/buffer_sync.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index 774b081b9b7f..7d61ae8ee8cf 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -561,6 +561,7 @@ void sync_buffer(int cpu) { struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu); struct mm_struct *mm = NULL; + struct mm_struct *oldmm; struct task_struct *new; unsigned long cookie = 0; int in_kernel = 1; @@ -586,34 +587,39 @@ void sync_buffer(int cpu) struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos]; if (is_code(s->eip)) { - if (s->event <= CPU_IS_KERNEL) { + switch (s->event) { + case 0: + case CPU_IS_KERNEL: /* kernel/userspace switch */ in_kernel = s->event; if (state == sb_buffer_start) state = sb_sample_start; add_kernel_ctx_switch(s->event); - } else if (s->event == CPU_TRACE_BEGIN) { + break; + case CPU_TRACE_BEGIN: state = sb_bt_start; add_trace_begin(); + break; #ifdef CONFIG_OPROFILE_IBS - } else if (s->event == IBS_FETCH_BEGIN) { + case IBS_FETCH_BEGIN: state = sb_bt_start; add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm); - } else if (s->event == IBS_OP_BEGIN) { + break; + case IBS_OP_BEGIN: state = sb_bt_start; add_ibs_begin(cpu_buf, IBS_OP_CODE, mm); + break; #endif - } else { - struct mm_struct *oldmm = mm; - + default: /* userspace context switch */ + oldmm = mm; new = (struct task_struct *)s->event; - release_mm(oldmm); mm = take_tasks_mm(new); if (mm != oldmm) cookie = get_exec_dcookie(mm); add_user_ctx_switch(new, cookie); + break; } } else if (state >= sb_bt_start && !add_sample(mm, s, in_kernel)) { |