From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Adrian Hunter <adrian.hunter@intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 15/18] perf intel-pt: Add MTC and CYC timestamps to debug log
Date: Tue, 6 Nov 2018 09:06:09 -0300 [thread overview]
Message-ID: <20181106120612.8262-16-acme@kernel.org> (raw)
In-Reply-To: <20181106120612.8262-1-acme@kernel.org>
From: Adrian Hunter <adrian.hunter@intel.com>
One cause of decoding errors is un-synchronized side-band data.
Timestamps are needed to debug such cases. TSC packet timestamps are
logged. Log also MTC and CYC timestamps.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/20181105073505.8129-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 58f6a9ceb590..4503f3ca45ab 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1474,6 +1474,8 @@ static void intel_pt_calc_mtc_timestamp(struct intel_pt_decoder *decoder)
decoder->have_calc_cyc_to_tsc = false;
intel_pt_calc_cyc_to_tsc(decoder, true);
}
+
+ intel_pt_log_to("Setting timestamp", decoder->timestamp);
}
static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)
@@ -1514,6 +1516,8 @@ static void intel_pt_calc_cyc_timestamp(struct intel_pt_decoder *decoder)
decoder->timestamp = timestamp;
decoder->timestamp_insn_cnt = 0;
+
+ intel_pt_log_to("Setting timestamp", decoder->timestamp);
}
/* Walk PSB+ packets when already in sync. */
--
2.14.4
next prev parent reply other threads:[~2018-11-06 12:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-06 12:05 [GIT PULL 00/18] perf/urgent improvements and fixes Arnaldo Carvalho de Melo
2018-11-06 12:05 ` Arnaldo Carvalho de Melo
2018-11-06 12:05 ` [PATCH 01/18] tools headers barrier: Fix arm64 tools build failure wrt smp_load_{acquire,release} Arnaldo Carvalho de Melo
2018-11-06 12:05 ` [PATCH 02/18] perf examples bpf: Start augmenting raw_syscalls:sys_{start,exit} Arnaldo Carvalho de Melo
2018-11-06 12:05 ` [PATCH 03/18] perf trace: When augmenting raw_syscalls plug raw_syscalls:sys_exit too Arnaldo Carvalho de Melo
2018-11-06 12:05 ` [PATCH 04/18] perf trace: Fix setting of augmented payload when using eBPF + raw_syscalls Arnaldo Carvalho de Melo
2018-11-06 12:05 ` [PATCH 05/18] perf augmented_syscalls: Start collecting pathnames in the BPF program Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 06/18] perf evlist: Move perf_evsel__reset_weak_group into evlist Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 07/18] perf record: Support weak groups Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 08/18] perf stat: Handle different PMU names with common prefix Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 09/18] perf top: Display the LBR stats in callchain entry Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 10/18] perf scripts python: exported-sql-viewer.py: Fall back to /usr/local/lib/libxed.so Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 11/18] perf scripts python: exported-sql-viewer.py: Add Selected branches report Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 12/18] perf scripts python: exported-sql-viewer.py: Add help window Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 13/18] perf scripts python: exported-sql-viewer.py: Fix table find when table re-ordered Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 14/18] perf intel-pt: Add more event information to debug log Arnaldo Carvalho de Melo
2018-11-06 12:06 ` Arnaldo Carvalho de Melo [this message]
2018-11-06 12:06 ` [PATCH 16/18] perf beauty: Use SRCARCH, ARCH=x86_64 must map to "x86" to find the headers Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 17/18] perf tools: Fix undefined symbol scnprintf in libperf-jvmti.so Arnaldo Carvalho de Melo
2018-11-06 12:06 ` [PATCH 18/18] perf tools: Do not zero sample_id_all for group members Arnaldo Carvalho de Melo
2018-11-06 19:06 ` [GIT PULL 00/18] perf/urgent improvements and fixes Ingo Molnar
2018-11-06 19:06 ` Ingo Molnar
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