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| author | Barry Kasindorf <barry.kasindorf@amd.com> | 2008-07-15 00:10:36 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2008-10-20 13:44:21 +0200 |
| commit | 9b1f261166f56d4b2c33fdf5aad64edd5e30b46f (patch) | |
| tree | 748011b45dc178a218df9146921ca027fa99b2cc /drivers | |
| parent | oprofile: hotplug cpu fix (diff) | |
| download | linux-9b1f261166f56d4b2c33fdf5aad64edd5e30b46f.tar.xz linux-9b1f261166f56d4b2c33fdf5aad64edd5e30b46f.zip | |
OProfile: Fix buffer synchronization for IBS
The patch is needed since there is some IBS code in add_ibs_begin()
that handles more than one sample per iteration. This requires calling
get_slots() during each loop.
This fixes the current problem, but a proper solution that reworks the
cpu buffer synchronization is needed here in the future.
Signed-off-by: Barry Kasindorf <barry.kasindorf@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/oprofile/buffer_sync.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index 33bfa60b0c66..6c0c92a745dd 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -564,9 +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); @@ -574,9 +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)) { |