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Adrian Hunter 0fe681f4ef perf intel-pt: Fix TSC slip 
commit f3b4e06b3bda759afd042d3d5fa86bea8f1fe278 upstream.

A TSC packet can slip past MTC packets so that the timestamp appears to
go backwards. One estimate is that can be up to about 40 CPU cycles,
which is certainly less than 0x1000 TSC ticks, but accept slippage an
order of magnitude more to be on the safe side.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 79b58424b8 ("perf tools: Add Intel PT support for decoding MTC packets")
Link: http://lkml.kernel.org/r/20190325135135.18348-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-03 06:23:28 +02:00
..
arch perf bench: Copy kernel files needed to build mem{cpy,set} x86_64 benchmarks 2019-03-23 08:44:37 +01:00
build Kbuild: fix # escaping in .cmd files for future Make 2018-07-19 15:35:57 +02:00
cgroup
firewire
hv Tools: hv: Fix a bug in the key delete code 2018-09-26 08:35:07 +02:00
iio
include perf bench: Copy kernel files needed to build mem{cpy,set} x86_64 benchmarks 2019-03-23 08:44:37 +01:00
laptop/freefall
lguest
lib tools/libbpf: handle issues with bpf ELF objects containing .eh_frames 2018-05-30 07:48:57 +02:00
net tools/net: Use include/uapi with __EXPORTED_HEADERS__ 2015-11-15 17:24:33 -05:00
nfsd
perf perf intel-pt: Fix TSC slip 2019-04-03 06:23:28 +02:00
power tools/power turbostat: Read extended processor family from CPUID 2018-09-05 09:18:36 +02:00
scripts Kbuild: fix # escaping in .cmd files for future Make 2018-07-19 15:35:57 +02:00
testing selftests: Move networking/timestamping from Documentation 2018-12-17 21:55:17 +01:00
thermal/tmon tools/thermal: tmon: fix for segfault 2018-05-30 07:49:10 +02:00
time
usb tools: usb: ffs-test: Fix build on big endian systems 2018-09-05 09:18:34 +02:00
virtio tools/virtio: fix byteswap logic 2015-12-07 17:28:10 +02:00
vm tools/vm/page-types.c: fix "defined but not used" warning 2018-10-10 08:52:11 +02:00
Makefile tools: Add a "make all" rule 2015-11-12 18:58:10 -03:00