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perf/core improvements and fixes:
- The 'perf test bpf' entry hooked a eBPF proggie to the SyS_epoll_wait() kernel function and expected it to be hit when calling the epoll_wait() libc wrapper, which changed recently, in systems such as Fedora 27, with the glibc wrapper calling instead the epoll_pwait() syscall, so switch to epoll_pwait() for both the kernel and libc function, getting it to work both in old and new systems (Arnaldo Carvalho de Melo) - Beautify 'gettid' syscall result in 'perf trace', and in doing so noticed that we need to handle namespaces in 'perf trace', will be dealt with in follow up patches where we'll try to figure out if the recent support for namespace in tools/perf/ can be used for this purpose as well. (Arnaldo Carvalho de Melo) - Introduce 'perf report --mmaps' and 'perf report --tasks' to show info present in 'perf.data' (Jiri Olsa, Arnaldo Carvalho de Melo) - Synchronize kernel <-> tooling headers wrt meltdown/spectre changes (Arnaldo Carvalho de Melo) - Fix a wrong offset issue when using /proc/kcore (Jin Yao) - Fix bug that prevented annotating symbols in perf.data files generated with 'perf record --branch-any' (Jin Yao) - Add infrastructure to record first and last sample time to the perf.data file header, so that when processing all samples in a 'perf record' session, such as when doing build-id processing, or when specifically requesting that that info be recorded, use that in 'perf report --time', that also got support for percent slices in addition to absolute ones. I.e. now it is possible to ask for the samples in the 10%-20% time slice of a perf.data file (Jin Yao) - Enable building with libbabeltrace by default (Jiri Olsa) - Display perf_event_attr::namespaces when duping the attributes in verbose mode (Jiri Olsa) - Allocate context task_ctx_data for child event (Jiri Olsa) - Update comments for PERF_RECORD_ITRACE_START and PERF_RECORD_MISC_* (Jiri Olsa) - Add support for showing PERF_RECORD_LOST events in 'perf script' (Jiri Olsa) - Add 'perf report --stats' option to display quick statistics about metadata events (PERF_RECORD_*) i.e. what we get at the end of 'perf report -D' (Jiri Olsa) - Fix compile error with libunwind x86 (Wang Nan) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEELb9bqkb7Te0zijNb1lAW81NSqkAFAlpWguYACgkQ1lAW81NS qkAa3Q//VQONL12l24Z5GoCch9/rMK8EqLSTWTvO/K1r9YMdgSf+iEPXCJOpLMp5 uImViefuxTsUg+lBWIHwmhzDVqK2Za5VjoqUhfWB69AdhosO9TILtPYBoipuTBUP 6BTHpZp65L63JnISJiD/+kckBvrcIJv0L73/CWxbJDeprqsJIPKf1d6biXRVq9YO WCE+acoLCWq+4quYiArggCjBbL5DgqA5R+XodODGy6372f1bXCJ7rUjio/R045l3 f+CLuBP6zaGrWav9JJBmfAckp7g4HVRCqsJrCOyRIy8Z3s91wlWlDyitJgpE/ftv uj8mrO8entx7tncKjiPRq+a1CCXhJpOkCGzSDT8NsE2FBbqqrsyP3VESQbyG2GG0 RegLBRUfedHvTyGQMvJ3pcSPkgtsXMvKHNPv7ahzGUAutCGeivunXgtWgeYlDiIc /bVfDXegrBIQITkHsSwLl9KGz0HyXn8pB3zoLHsBPhAvdGoeyuwCLS88fWoVkOrR BisxS4dDWbdHhuBOeFg3LCd7q1nRPx2TS7LAxY+3r7ZIsqyUNuYqiEq0kj+kqedK HIeLmjwTHWNi+Yec0ZWlaYKy8E4bg1f+OYgWbaaIHI7vZzxq1x/C7LZ9/APUfsfB 2AWLJrP6y961FQvh/7dUjMlXKpAQZhmZw/NmZmMY6OWLgkUKnRk= =Ncst -----END PGP SIGNATURE----- Merge tag 'perf-core-for-mingo-4.16-20180110' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: - The 'perf test bpf' entry hooked a eBPF proggie to the SyS_epoll_wait() kernel function and expected it to be hit when calling the epoll_wait() libc wrapper, which changed recently, in systems such as Fedora 27, with the glibc wrapper calling instead the epoll_pwait() syscall, so switch to epoll_pwait() for both the kernel and libc function, getting it to work both in old and new systems (Arnaldo Carvalho de Melo) - Beautify 'gettid' syscall result in 'perf trace', and in doing so noticed that we need to handle namespaces in 'perf trace', will be dealt with in follow up patches where we'll try to figure out if the recent support for namespace in tools/perf/ can be used for this purpose as well. (Arnaldo Carvalho de Melo) - Introduce 'perf report --mmaps' and 'perf report --tasks' to show info present in 'perf.data' (Jiri Olsa, Arnaldo Carvalho de Melo) - Synchronize kernel <-> tooling headers wrt meltdown/spectre changes (Arnaldo Carvalho de Melo) - Fix a wrong offset issue when using /proc/kcore (Jin Yao) - Fix bug that prevented annotating symbols in perf.data files generated with 'perf record --branch-any' (Jin Yao) - Add infrastructure to record first and last sample time to the perf.data file header, so that when processing all samples in a 'perf record' session, such as when doing build-id processing, or when specifically requesting that that info be recorded, use that in 'perf report --time', that also got support for percent slices in addition to absolute ones. I.e. now it is possible to ask for the samples in the 10%-20% time slice of a perf.data file (Jin Yao) - Enable building with libbabeltrace by default (Jiri Olsa) - Display perf_event_attr::namespaces when duping the attributes in verbose mode (Jiri Olsa) - Allocate context task_ctx_data for child event (Jiri Olsa) - Update comments for PERF_RECORD_ITRACE_START and PERF_RECORD_MISC_* (Jiri Olsa) - Add support for showing PERF_RECORD_LOST events in 'perf script' (Jiri Olsa) - Add 'perf report --stats' option to display quick statistics about metadata events (PERF_RECORD_*) i.e. what we get at the end of 'perf report -D' (Jiri Olsa) - Fix compile error with libunwind x86 (Wang Nan) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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