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perf cs-etm: Modularize auxtrace_buffer fetch function

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Making the auxtrace_buffer fetch function modular so that it can be
called from different decoding context (timeless vs. non-timeless),
avoiding to repeat code.

No change in functionality is introduced by this patch.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-14-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2019-02-12 10:16:18 -07:00 committed by Arnaldo Carvalho de Melo
parent 3fa0e83e29
commit 8224531cf5
1 changed files with 29 additions and 12 deletions
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41
tools/perf/util/cs-etm.c
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@ -1152,6 +1152,32 @@ static int cs_etm__end_block(struct cs_etm_queue *etmq)
return 0;
}
/*
* cs_etm__get_data_block: Fetch a block from the auxtrace_buffer queue
* if need be.
* Returns: < 0 if error
* = 0 if no more auxtrace_buffer to read
* > 0 if the current buffer isn't empty yet
*/
static int cs_etm__get_data_block(struct cs_etm_queue *etmq)
{
int ret;
if (!etmq->buf_len) {
ret = cs_etm__get_trace(etmq);
if (ret <= 0)
return ret;
/*
* We cannot assume consecutive blocks in the data file
* are contiguous, reset the decoder to force re-sync.
*/
ret = cs_etm_decoder__reset(etmq->decoder);
if (ret)
return ret;
}
return etmq->buf_len;
}
static bool cs_etm__is_svc_instr(struct cs_etm_queue *etmq,
struct cs_etm_packet *packet,
@ -1591,18 +1617,9 @@ static int cs_etm__run_decoder(struct cs_etm_queue *etmq)
/* Go through each buffer in the queue and decode them one by one */
while (1) {
if (!etmq->buf_len) {
err = cs_etm__get_trace(etmq);
if (err <= 0)
return err;
/*
* We cannot assume consecutive blocks in the data file
* are contiguous, reset the decoder to force re-sync.
*/
err = cs_etm_decoder__reset(etmq->decoder);
if (err != 0)
return err;
}
err = cs_etm__get_data_block(etmq);
if (err <= 0)
return err;
/* Run trace decoder until buffer consumed or end of trace */
do {