[PATCH 35/43] perf cs-etm: Modularize auxtrace_buffer fetch function
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From: Arnaldo Carvalho de Melo <acme@kernel.org>
Date: 2019-02-15 00:48:30
Also in:
linux-perf-users, lkml
Subsystem:
arm/coresight framework and drivers, performance events subsystem, performance events tooling arm64, the rest · Maintainers:
Suzuki K Poulose, Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
From: Mathieu Poirier <mathieu.poirier@linaro.org> 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 <redacted> Cc: Leo Yan <redacted> 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 <redacted> --- tools/perf/util/cs-etm.c | 41 ++++++++++++++++++++++++++++------------ 1 file changed, 29 insertions(+), 12 deletions(-)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index f607bc58bd03..110804936fc3 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c@@ -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 {
--
2.19.1
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