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dsp: Replace wall clock for KPI calculations

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Replace clock reference from wall clock to MONOTONIC.
This is to avoid getting impacted when system time is
set backwards or forwards (either through network or manually).

Change-Id: I98625b033f689002c9334633cf3944608d5a77d3
Signed-off-by: Md Mansoor Ahmed <mansoor@codeaurora.org>
This commit is contained in:
Md Mansoor Ahmed 2019-03-12 11:13:11 +05:30 • committed by Gerrit - the friendly Code Review server
commit be50237438
1 changed files with 32 additions and 5 deletions
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37
dsp/q6asm.c
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@ -389,6 +389,33 @@ static const struct file_operations audio_input_latency_debug_fops = {
.write = audio_input_latency_dbgfs_write
};
/*
* get_monotonic_timeval -
* This method returns a structure in timeval
* format (sec,microsec) by using ktime kernel
* API to get time in nano secs and then converts
* it to timeval format
*
* ktime_get [nsec]-> ktime_to_timespec [sec,nsec]-> timeval[sec,usec]
*
* Returns struct timeval
*/
static struct timeval get_monotonic_timeval(void)
{
static struct timeval out_tval;
/* Get time from monotonic clock in nanoseconds */
ktime_t kTimeNsec = ktime_get();
/* Convert it to timespec format and later to timeval as expected by audio HAL */
struct timespec temp_tspec = ktime_to_timespec(kTimeNsec);
/* Time returned above is in sec,nanosec format, needs to convert to sec,microsec */
out_tval.tv_usec = temp_tspec.tv_nsec/1000;
out_tval.tv_sec = temp_tspec.tv_sec;
return out_tval;
}
static void config_debug_fs_write_cb(void)
{
if (out_enable_flag) {
@ -396,7 +423,7 @@ static void config_debug_fs_write_cb(void)
* out_cold_index
*/
if (out_cold_index != 1) {
do_gettimeofday(&out_cold_tv);
out_cold_tv = get_monotonic_timeval();
pr_debug("COLD: apr_send_pkt at %ld sec %ld microsec\n",
out_cold_tv.tv_sec,
out_cold_tv.tv_usec);
@ -421,7 +448,7 @@ static void config_debug_fs_read_cb(void)
* Hence continuous input latency
*/
if (in_cont_index == 7) {
do_gettimeofday(&in_cont_tv);
in_cont_tv = get_monotonic_timeval();
pr_info("%s: read buffer at %ld sec %ld microsec\n",
__func__,
in_cont_tv.tv_sec, in_cont_tv.tv_usec);
@ -438,7 +465,7 @@ static void config_debug_fs_reset_index(void)
static void config_debug_fs_run(void)
{
if (out_enable_flag) {
do_gettimeofday(&out_cold_tv);
out_cold_tv = get_monotonic_timeval();
pr_debug("%s: COLD apr_send_pkt at %ld sec %ld microsec\n",
__func__, out_cold_tv.tv_sec, out_cold_tv.tv_usec);
}
@ -453,7 +480,7 @@ static void config_debug_fs_write(struct audio_buffer *ab)
*/
if ((strcmp(((char *)ab->data), zero_pattern)) &&
(!strcmp(((char *)ab->data + 2), zero_pattern))) {
do_gettimeofday(&out_warm_tv);
out_warm_tv = get_monotonic_timeval();
pr_debug("%s: WARM:apr_send_pkt at %ld sec %ld microsec\n",
__func__,
out_warm_tv.tv_sec,
@ -465,7 +492,7 @@ static void config_debug_fs_write(struct audio_buffer *ab)
*/
else if ((!strcmp(((char *)ab->data), zero_pattern))
&& (strcmp(((char *)ab->data + 2), zero_pattern))) {
do_gettimeofday(&out_cont_tv);
out_cont_tv = get_monotonic_timeval();
pr_debug("%s: CONT:apr_send_pkt at %ld sec %ld microsec\n",
__func__,
out_cont_tv.tv_sec,