kernel/tools/perf/util/intel-pt.c, branch linux-5.2.y

perf intel-pt: Fix itrace defaults for perf script

2019-07-14T06:01:08Z

commit 26f19c2eb7e54015564ff133b91983a74e84541b upstream. Commit 4eb068157121 ("perf script: Make itrace script default to all calls") does not work because 'use_browser' is being used to determine whether to default to periodic sampling (i.e. better for perf report). The result is that nothing but CBR events display for perf script when no --itrace option is specified. Fix by using 'default_no_sample' and 'inject' instead. Example: Before: $ perf record -e intel_pt/cyc/u ls $ perf script > cmp1.txt $ perf script --itrace=cepwx > cmp2.txt $ diff -sq cmp1.txt cmp2.txt Files cmp1.txt and cmp2.txt differ After: $ perf script > cmp1.txt $ perf script --itrace=cepwx > cmp2.txt $ diff -sq cmp1.txt cmp2.txt Files cmp1.txt and cmp2.txt are identical Signed-off-by: Adrian Hunter Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: stable@vger.kernel.org # v4.20+ Fixes: 90e457f7be08 ("perf tools: Add Intel PT support") Link: http://lkml.kernel.org/r/20190520113728.14389-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288

2019-06-05T15:36:37Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman

perf intel-pt: Fix divide by zero when TSC is not available

2019-03-01T17:48:30Z

When TSC is not available, "timeless" decoding is used but a divide by zero occurs if perf_time_to_tsc() is called. Ensure the divisor is not zero. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Cc: stable@vger.kernel.org # v4.9+ Link: https://lkml.kernel.org/n/tip-1i4j0wqoc8vlbkcizqqxpsf4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf auxtrace: Add timestamp to auxtrace errors

2019-02-06T14:20:32Z

The timestamp can use useful to find part of a trace that has an error without outputting all of the trace e.g. using the itrace 's' option to skip initial number of events. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/20190206103947.15750-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf thread-stack: Fix thread stack processing for the idle task

2019-01-02T14:03:17Z

perf creates a single 'struct thread' to represent the idle task. That is because threads are identified by PID and TID, and the idle task always has PID == TID == 0. However, there are actually separate idle tasks for each CPU. That creates a problem for thread stack processing which assumes that each thread has a single stack, not one stack per CPU. Fix that by passing through the CPU number, and in the case of the idle "thread", pick the thread stack from an array based on the CPU number. Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20181221120620.9659-8-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Add more event information to debug log

2018-11-05T17:53:37Z

More event information is useful for debugging, especially MMAP events. Signed-off-by: Adrian Hunter Link: http://lkml.kernel.org/r/20181105073505.8129-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt/bts: Calculate cpumode for synthesized samples

2018-10-31T15:56:26Z

In the absence of a fallback, samples must provide a correct cpumode for the 'ip'. Do that now there is no fallback. Signed-off-by: Adrian Hunter Reviewed-by: Jiri Olsa Cc: Andi Kleen Cc: David S. Miller Cc: Leo Yan Cc: Mathieu Poirier Cc: stable@vger.kernel.org # 4.19 Link: http://lkml.kernel.org/r/20181031091043.23465-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Insert callchain context into synthesized callchains

2018-10-31T15:54:27Z

In the absence of a fallback, callchains must encode also the callchain context. Do that now there is no fallback. Signed-off-by: Adrian Hunter Reviewed-by: Jiri Olsa Cc: Andi Kleen Cc: David S. Miller Cc: Leo Yan Cc: Mathieu Poirier Cc: stable@vger.kernel.org # 4.19 Link: http://lkml.kernel.org/r/100ea2ec-ed14-b56d-d810-e0a6d2f4b069@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf script: Make itrace script default to all calls

2018-10-24T18:29:54Z

By default 'perf script' for itrace outputs sampled instructions or branches. In my experience this is confusing to users because it's hard to correlate with real program behavior. The sampling makes sense for tools like 'perf report' that actually sample to reduce the run time, but run time is normally not a problem for 'perf script'. It's better to give an accurate representation of the program flow. Default 'perf script' to output all calls for itrace. That's a much saner default. The old behavior can be still requested with 'perf script' --itrace=ibxwpe100000 v2: Fix ETM build failure v3: Really fix ETM build failure (Kim Phillips) Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Cc: Kim Phillips Cc: Leo Yan Link: http://lkml.kernel.org/r/20180920180540.14039-3-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Add decoder flags for trace begin / end

2018-09-20T18:19:51Z

Previously, the decoder would indicate begin / end by a branch from / to zero. That hides useful information, in particular when a trace ends with a call. To prepare for remedying that, add Intel PT decoder flags for trace begin / end and map them to the existing sample flags. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/20180920130048.31432-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo