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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id n12sm21573191pgr.2.2021.07.19.12.39.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Jul 2021 12:39:31 -0700 (PDT) Date: Mon, 19 Jul 2021 13:39:29 -0600 From: Mathieu Poirier To: James Clark Cc: acme@kernel.org, coresight@lists.linaro.org, leo.yan@linaro.org, al.grant@arm.com, branislav.rankov@arm.com, suzuki.poulose@arm.com, anshuman.khandual@arm.com, Mike Leach , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , John Garry , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/6] perf cs-etm: Suppress printing when resetting decoder Message-ID: <20210719193929.GE2255168@p14s> References: <20210713154008.29656-1-james.clark@arm.com> <20210713154008.29656-5-james.clark@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210713154008.29656-5-james.clark@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 13, 2021 at 04:40:06PM +0100, James Clark wrote: > The decoder is quite noisy when being reset. In a future commit, > dump-raw-trace will use a code path that resets the decoder rather than > creating a new one, so printing has to be suppressed to not flood the > output. > > Signed-off-by: James Clark > --- > tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > Reviewed-by: Mathieu Poirier > diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > index 3e1a05bc82cc..ed1f0326f859 100644 > --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > @@ -35,6 +35,7 @@ > struct cs_etm_decoder { > void *data; > void (*packet_printer)(const char *msg); > + bool suppress_printing; > dcd_tree_handle_t dcd_tree; > cs_etm_mem_cb_type mem_access; > ocsd_datapath_resp_t prev_return; > @@ -74,9 +75,10 @@ int cs_etm_decoder__reset(struct cs_etm_decoder *decoder) > ocsd_datapath_resp_t dp_ret; > > decoder->prev_return = OCSD_RESP_CONT; > - > + decoder->suppress_printing = true; > dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET, > 0, 0, NULL, NULL); > + decoder->suppress_printing = false; > if (OCSD_DATA_RESP_IS_FATAL(dp_ret)) > return -1; > > @@ -146,8 +148,10 @@ static void cs_etm_decoder__print_str_cb(const void *p_context, > const char *msg, > const int str_len) > { > - if (p_context && str_len) > - ((struct cs_etm_decoder *)p_context)->packet_printer(msg); > + const struct cs_etm_decoder *decoder = p_context; > + > + if (p_context && str_len && !decoder->suppress_printing) > + decoder->packet_printer(msg); > } > > static int > -- > 2.28.0 >