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Sun, 2 Aug 2026 18:08:27 +0000 (GMT) From: Tanushree Shah To: acme@kernel.org, jolsa@kernel.org, adrian.hunter@intel.com, vmolnaro@redhat.com, mpetlan@redhat.com, tmricht@linux.ibm.com, maddy@linux.ibm.com, irogers@google.com, namhyung@kernel.org Cc: linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, atrajeev@linux.ibm.com, hbathini@linux.ibm.com, Tejas.Manhas1@ibm.com, Tanushree.Shah@ibm.com, rostedt@goodmis.org, Tanushree Shah Subject: [RFC PATCH v2 4/5] perf data: Add --to-trace-dat option for converting perf.data tracepoint events into trace.dat format Date: Sun, 2 Aug 2026 23:37:59 +0530 Message-ID: <20260802180801.65183-5-tshah@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260802180801.65183-1-tshah@linux.ibm.com> References: <20260802180801.65183-1-tshah@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Info: AW1haW4tMjYwODAyMDE2MiBTYWx0ZWRfXyc2nnHf3YvN9 LSvhVbz61Y0GmzQjAdKEg09UBa/a714R+UiPmipxfhL5HQMv7W9adFbfM7EWKqRc3PVKetadocD uWxNPLomZfArgXKBTOu+fYuLBM05TOA= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODAyMDE2MiBTYWx0ZWRfX8FgBt1HjaDQh PZB5ONhkunSetTBog/SDq3gNrd5AlVuTjHVNELaKKyEQhOlrZvM1mwRc+SXQktsXPezBRh9GW4T jiPUf3vpVFvL5hP1hUJz8JaJ/K0bi77jlqGyOuSPnQk8Duh+brm74KOxYsBpSrtCsu0YnvGU6nH oTvcnUbXY7WOoTsV1s/kGpvtWcaELyni2aov/3KE7FV9/jmt+9iO2NUqvttpS6B1K1TZC05BlHb zCNggvm/me8bsKHiRZ9qSSVypbZ485+aDmU+TIYLPsmkikirtl9vTK+SB0HDmhmO16iADa+zhmY 0g//9DXF/LaAzOdI4P6LVEeJOjde1B1r0ec4x9wI06LVRrCykbZM/0C8XWUS4cfszQlDhnp4JO1 rZzl8er7BZ4MoxdeqR1/ymWD3ybtxrVDCp55pHWGtcB+rtrOyOcxGPpf32ZR+8SSJdTWS/KXkLT H/UnhwrCtCQuCAc5YaA== X-Authority-Analysis: v=2.4 cv=SI1ykuvH c=1 sm=1 tr=0 ts=6a6f87a5 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=bBqKyimmlcDRj2OxEasA:9 X-Proofpoint-ORIG-GUID: 4rv2lrKpg_CyX089Mk5kLncyiWTW2Dzs X-Proofpoint-GUID: s0F9CQDvn1lqAI4vrTNMtGdWkwwDPX1R X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-02_05,2026-07-30_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 suspectscore=0 impostorscore=0 spamscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608020162 Add new command-line option to perf data convert for generating trace.dat output files. The --to-trace-dat option: - Accepts output filename for trace.dat format - Mutually exclusive with --to-ctf and --to-json - Calls trace_convert__perf2dat() to perform conversion Usage: $ perf record -e sched:* -a sleep 1 $ perf data convert --to-trace-dat=trace.dat $ trace-cmd report trace.dat Document the new option in Documentation/perf-data.txt alongside the existing --to-ctf and --to-json entries. Signed-off-by: Tanushree Shah --- tools/perf/Documentation/perf-data.txt | 7 +++++ tools/perf/builtin-data.c | 40 ++++++++++++++++++++++++-- tools/perf/util/trace-dat.c | 3 ++ 3 files changed, 48 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-data.txt b/tools/perf/Documentation/perf-data.txt index 20f178d61ed7..578ba6357183 100644 --- a/tools/perf/Documentation/perf-data.txt +++ b/tools/perf/Documentation/perf-data.txt @@ -30,6 +30,13 @@ OPTIONS for 'convert' --to-json:: Triggers JSON conversion. Specify the JSON filename to output. +--to-trace-dat:: + Triggers trace.dat conversion. Converts perf.data tracepoint events + to trace.dat format v7, compatible with trace-cmd and KernelShark. + Only PERF_TYPE_TRACEPOINT events are converted. Specify the + trace.dat filename to output. Requires libtraceevent support. + Mutually exclusive with --to-ctf and --to-json. + --tod:: Convert time to wall clock time. diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c index 4c08ccb8c06b..194537503ba9 100644 --- a/tools/perf/builtin-data.c +++ b/tools/perf/builtin-data.c @@ -30,6 +30,11 @@ static const char *data_usage[] = { static const char *to_json; static const char *to_ctf; + +#ifdef HAVE_LIBTRACEEVENT +static const char *trace_dat_output; +#endif + static struct perf_data_convert_opts opts = { .force = false, .all = false, @@ -48,6 +53,10 @@ static const struct option data_options[] = { OPT_BOOLEAN(0, "all", &opts.all, "Convert all events"), OPT_STRING(0, "time", &opts.time_str, "str", "Time span of interest (start,stop)"), +#ifdef HAVE_LIBTRACEEVENT + OPT_STRING(0, "to-trace-dat", &trace_dat_output, + "file", "Convert to trace.dat format using perf.data tracepoints"), +#endif OPT_END() }; @@ -65,16 +74,43 @@ static int cmd_data_convert(int argc, const char **argv) pr_err("You cannot specify both --to-ctf and --to-json.\n"); return -1; } +#ifdef HAVE_LIBTRACEEVENT + if (trace_dat_output && (to_json || to_ctf)) { + pr_err("You cannot specify --to-trace-dat with --to-ctf or --to-json.\n"); + return -1; + } +#endif + #ifdef HAVE_LIBBABELTRACE_SUPPORT + #ifdef HAVE_LIBTRACEEVENT + if (!to_json && !to_ctf && !trace_dat_output) { + pr_err("You must specify one of --to-ctf, --to-json, or --to-trace-dat.\n"); + return -1; + } + #else if (!to_json && !to_ctf) { pr_err("You must specify one of --to-ctf or --to-json.\n"); return -1; } + #endif #else + #ifdef HAVE_LIBTRACEEVENT + if (!to_json && !trace_dat_output) { + pr_err("You must specify --to-json or --to-trace-dat.\n"); + return -1; + } + #else if (!to_json) { pr_err("You must specify --to-json.\n"); - return -1; -} + return -1; + } + #endif +#endif + +#ifdef HAVE_LIBTRACEEVENT + if (trace_dat_output) + return trace_convert__perf2dat(input_name ? input_name : "perf.data", + trace_dat_output, &opts); #endif if (to_json) diff --git a/tools/perf/util/trace-dat.c b/tools/perf/util/trace-dat.c index f71e03716e27..5598496c9a61 100644 --- a/tools/perf/util/trace-dat.c +++ b/tools/perf/util/trace-dat.c @@ -861,6 +861,9 @@ void trace_dat__free_cpu_buffers(void) for (cpu = 0; cpu < trace_dat_nr_cpus; cpu++) { int i; + if (!trace_cpu_data[cpu].events) + continue; + for (i = 0; i < trace_cpu_data[cpu].count; i++) free(trace_cpu_data[cpu].events[i].raw); free(trace_cpu_data[cpu].events); -- 2.47.3