kernel/linux.git/tools/perf/util/intel-pt.c, branch v5.18

perf intel-pt: Force 'quick' mode when TNT (Taken/Not-Taken packet) is disabled

2022-02-15T20:13:43+00:00

It is not possible to walk the executable code without TNT packets, so force 'quick' mode when TNT is disabled, because 'quick' mode does not walk the code. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-18-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Synthesize new D (Intr Disabled) and t (Intr Toggle) flags

2022-02-15T20:13:23+00:00

Update sample flags to represent the state and changes to the interrupt flag. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-17-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Synthesize iflag event

2022-02-15T20:13:02+00:00

Synthesize an attribute event and sample events for changes to the interrupt flag represented by the MODE.Exec packet. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-16-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Synthesize CFE (Control Flow Event) / EVD (Event Data) event

2022-02-15T20:12:13+00:00

Synthesize an attribute event and sample events for Intel PT Event Trace events represented by CFE and EVD packets. Committer notes: Make 'struct perf_synth_intel_evd evd[]' evd[0] at the end of 'struct perf_synth_intel_evt' as it is breaking the build with in many compilers with (e.g. clang version 13.0.0 (Fedora 13.0.0-3.fc35)): util/intel-pt.c:2213:31: error: field 'cfe' with variable sized type 'struct perf_synth_intel_evt' not at the end of a struct or class is a GNU extension [-Werror,-Wgnu-variable-sized-type-not-at-end] struct perf_synth_intel_evt cfe; ^ Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-15-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Record Event Trace capability flag

2022-02-15T20:11:16+00:00

The change to the MODE.Exec packet means processing must distinguish between the old and new cases. Record the Event Trace capability flag to make that possible. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-14-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: decoder: Add config bit definitions

2022-02-15T20:06:32+00:00

Tidy up config bit constants to use #define. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20220124084201.2699795-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix parsing of VM time correlation arguments

2021-12-28T20:26:25+00:00

Parser did not take ':' into account. Example: Before: $ perf record -e intel_pt//u uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.026 MB perf.data ] $ perf inject -i perf.data --vm-time-correlation="dry-run 123" $ perf inject -i perf.data --vm-time-correlation="dry-run 123:456" Failed to parse VM Time Correlation options 0x620 [0x98]: failed to process type: 70 [Invalid argument] $ After: $ perf inject -i perf.data --vm-time-correlation="dry-run 123:456" $ Fixes: e3ff42bdebcfeb5f ("perf intel-pt: Parse VM Time Correlation options and set up decoding") Signed-off-by: Adrian Hunter Acked-by: Namhyung Kim Cc: Jiri Olsa Cc: Riccardo Mancini Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20211215080636.149562-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix error timestamp setting on the decoder error path

2021-12-11T11:19:47+00:00

An error timestamp shows the last known timestamp for the queue, but this is not updated on the error path. Fix by setting it. Fixes: f4aa081949e7b6 ("perf tools: Add Intel PT decoder") Signed-off-by: Adrian Hunter Cc: Jiri Olsa Cc: stable@vger.kernel.org # v5.15+ Link: https://lore.kernel.org/r/20211210162303.2288710-8-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Support itrace d+o option to direct debug log to stdout

2021-10-27T19:21:01+00:00

It can be useful to see debug output in between normal output. Add support for AUXTRACE_LOG_FLG_USE_STDOUT to Intel PT. Reviewed-by: Andi Kleen Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: https://lore.kernel.org/r/20211027080334.365596-7-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Support itrace A option to approximate IPC

2021-10-27T19:20:18+00:00

Normally, for cycle-acccurate mode, IPC values are an exact number of instructions and cycles. Due to the granularity of timestamps, that happens only when a CYC packet correlates to the event. Support the itrace 'A' option, to use instead, the number of cycles associated with the current timestamp. This provides IPC information for every change of timestamp, but at the expense of accuracy. Due to the granularity of timestamps, the actual number of cycles increases even though the cycles reported does not. The number of instructions is known, but if IPC is reported, cycles can be too low and so IPC is too high. Note that inaccuracy decreases as the period of sampling increases i.e. if the number of cycles is too low by a small amount, that becomes less significant if the number of cycles is large. Furthermore, it can be used in conjunction with dlfilter-show-cycles.so to provide higher granularity cycle information. Reviewed-by: Andi Kleen Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: https://lore.kernel.org/r/20211027080334.365596-4-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo