@@ -655,6 +655,85 @@ void osnoise_put_print_stack(struct osnoise_context *context)
context->orig_print_stack = OSNOISE_OPTION_INIT_VAL;
}
+/*
+ * osnoise_get_tracing_thresh - read and save the original "tracing_thresh"
+ */
+static long long
+osnoise_get_tracing_thresh(struct osnoise_context *context)
+{
+ long long tracing_thresh;
+
+ if (context->tracing_thresh != OSNOISE_OPTION_INIT_VAL)
+ return context->tracing_thresh;
+
+ if (context->orig_tracing_thresh != OSNOISE_OPTION_INIT_VAL)
+ return context->orig_tracing_thresh;
+
+ tracing_thresh = osnoise_read_ll_config("tracing_thresh");
+ if (tracing_thresh < 0)
+ goto out_err;
+
+ context->orig_tracing_thresh = tracing_thresh;
+ return tracing_thresh;
+
+out_err:
+ return OSNOISE_OPTION_INIT_VAL;
+}
+
+/*
+ * osnoise_set_tracing_thresh - set "tracing_thresh"
+ */
+int osnoise_set_tracing_thresh(struct osnoise_context *context, long long tracing_thresh)
+{
+ long long curr_tracing_thresh = osnoise_get_tracing_thresh(context);
+ int retval;
+
+ if (curr_tracing_thresh == OSNOISE_OPTION_INIT_VAL)
+ return -1;
+
+ retval = osnoise_write_ll_config("tracing_thresh", tracing_thresh);
+ if (retval < 0)
+ return -1;
+
+ context->tracing_thresh = tracing_thresh;
+
+ return 0;
+}
+
+/*
+ * osnoise_restore_tracing_thresh - restore the original "tracing_thresh"
+ */
+void osnoise_restore_tracing_thresh(struct osnoise_context *context)
+{
+ int retval;
+
+ if (context->orig_tracing_thresh == OSNOISE_OPTION_INIT_VAL)
+ return;
+
+ if (context->orig_tracing_thresh == context->tracing_thresh)
+ goto out_done;
+
+ retval = osnoise_write_ll_config("tracing_thresh", context->orig_tracing_thresh);
+ if (retval < 0)
+ err_msg("Could not restore original tracing_thresh\n");
+
+out_done:
+ context->tracing_thresh = OSNOISE_OPTION_INIT_VAL;
+}
+
+/*
+ * osnoise_put_tracing_thresh - restore original values and cleanup data
+ */
+void osnoise_put_tracing_thresh(struct osnoise_context *context)
+{
+ osnoise_restore_tracing_thresh(context);
+
+ if (context->orig_tracing_thresh == OSNOISE_OPTION_INIT_VAL)
+ return;
+
+ context->orig_tracing_thresh = OSNOISE_OPTION_INIT_VAL;
+}
+
/*
* enable_osnoise - enable osnoise tracer in the trace_instance
*/
@@ -716,6 +795,9 @@ struct osnoise_context *osnoise_context_alloc(void)
context->orig_print_stack = OSNOISE_OPTION_INIT_VAL;
context->print_stack = OSNOISE_OPTION_INIT_VAL;
+ context->orig_tracing_thresh = OSNOISE_OPTION_INIT_VAL;
+ context->tracing_thresh = OSNOISE_OPTION_INIT_VAL;
+
osnoise_get_context(context);
return context;
@@ -741,6 +823,7 @@ void osnoise_put_context(struct osnoise_context *context)
osnoise_put_stop_total_us(context);
osnoise_put_timerlat_period_us(context);
osnoise_put_print_stack(context);
+ osnoise_put_tracing_thresh(context);
free(context);
}
@@ -23,6 +23,10 @@ struct osnoise_context {
long long orig_timerlat_period_us;
long long timerlat_period_us;
+ /* 0 as init value */
+ long long orig_tracing_thresh;
+ long long tracing_thresh;
+
/* -1 as init value because 0 is disabled */
long long orig_stop_us;
long long stop_us;
@@ -67,6 +71,10 @@ int osnoise_set_timerlat_period_us(struct osnoise_context *context,
long long timerlat_period_us);
void osnoise_restore_timerlat_period_us(struct osnoise_context *context);
+int osnoise_set_tracing_thresh(struct osnoise_context *context,
+ long long tracing_thresh);
+void osnoise_restore_tracing_thresh(struct osnoise_context *context);
+
void osnoise_restore_print_stack(struct osnoise_context *context);
int osnoise_set_print_stack(struct osnoise_context *context,
long long print_stack);
osnoise uses the tracing_thresh parameter to define the delta between two reads of the time to be considered a noise. Add support to get and set the tracing_thresh from osnoise tools. Cc: Daniel Bristot de Oliveira <bristot@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> --- tools/tracing/rtla/src/osnoise.c | 83 ++++++++++++++++++++++++++++++++ tools/tracing/rtla/src/osnoise.h | 8 +++ 2 files changed, 91 insertions(+)