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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-03-08 09:38:44 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-03-31 15:52:24 +0200 |
| commit | 46bc29b970f0011a9099077f1db8f3540aa829fe (patch) | |
| tree | 938c97e15993470419809aa90273f7311e2180d6 /tools/perf/util/tsc.h | |
| parent | perf trace: Pretty print getrandom() args (diff) | |
| download | linux-46bc29b970f0011a9099077f1db8f3540aa829fe.tar.xz linux-46bc29b970f0011a9099077f1db8f3540aa829fe.zip | |
perf tools: Add time conversion event
Intel PT uses the time members from the perf_event_mmap_page to convert
between TSC and perf time.
Due to a lack of foresight when Intel PT was implemented, those time
members were recorded in the (implementation dependent) AUXTRACE_INFO
event, the structure of which is generally inaccessible outside of the
Intel PT decoder. However now the conversion between TSC and perf time
is needed when processing a jitdump file when Intel PT has been used for
tracing.
So add a user event to record the time members. 'perf record' will
synthesize the event if the information is available. And session
processing will put a copy of the event on the session so that tools
like 'perf inject' can easily access it.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1457426324-30158-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/tsc.h')
| -rw-r--r-- | tools/perf/util/tsc.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/tsc.h b/tools/perf/util/tsc.h index a8b78f1b3243..280ddc067556 100644 --- a/tools/perf/util/tsc.h +++ b/tools/perf/util/tsc.h @@ -3,10 +3,20 @@ #include <linux/types.h> +#include "event.h" #include "../arch/x86/util/tsc.h" u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); u64 rdtsc(void); +struct perf_event_mmap_page; +struct perf_tool; +struct machine; + +int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc, + struct perf_tool *tool, + perf_event__handler_t process, + struct machine *machine); + #endif |