Adrian Hunter b1d528d090 perf intel-pt: Fix MTC timestamp calculation for large MTC periods
commit 3bccbe20f6d188ce7b00326e776b745cfd35b10a upstream.

The MTC packet provides a 8-bit slice of CTC which is related to TSC by
the TMA packet, however the TMA packet only provides the lower 16 bits
of CTC.  If mtc_shift > 8 then some of the MTC bits are not in the CTC
provided by the TMA packet. Fix-up the last_mtc calculated from the TMA
packet by copying the missing bits from the current MTC assuming the
least difference between the two, and that the current MTC comes after
last_mtc.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1475062896-22274-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28 03:01:27 -04:00
..
2015-08-26 06:12:35 +02:00
2015-11-16 22:57:02 +01:00
2015-10-22 17:19:33 -07:00
2015-12-07 17:28:10 +02:00
2015-11-12 18:58:10 -03:00