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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![]() User visible: . Initial support for namespaces, using setns to access files in namespaces, grabbing their build-ids, etc. We still need to work more to deal with namespaces that vanish before we can get the needed data to do analysis, but this should be as good as what is in bcc now (Krister Johansen) . Add header record types to pipe-mode, now this command: $ perf record -o - -e cycles sleep 1 | perf report --stdio --header Will show the same as in non-pipe mode, i.e. involving a perf.data file (David Carrillo-Cisneros) . Implement a visual marker for fused x86 instructions in the annotate TUI browser, available now in 'perf report', more work needed to have it available as well in 'perf top' (Jin Yao) Further explanation from one of Jin's patches: │ ┌──cmpl $0x0,argp_program_version_hook 81.93 │ ├──je 20 │ │ lock cmpxchg %esi,0x38a9a4(%rip) │ │↓ jne 29 │ │↓ jmp 43 11.47 │20:└─→cmpxch %esi,0x38a999(%rip) That means the cmpl+je is a fused instruction pair and they should be considered together. . Record the branch type and then show statistics and info about in callchain entries (Jin Yao) Example from one of Jin's patches: # perf record -g -j any,save_type # perf report --branch-history --stdio --no-children 38.50% div.c:45 [.] main div | ---main div.c:42 (RET CROSS_2M cycles:2) compute_flag div.c:28 (cycles:2) compute_flag div.c:27 (RET CROSS_2M cycles:1) rand rand.c:28 (cycles:1) rand rand.c:28 (RET CROSS_2M cycles:1) __random random.c:298 (cycles:1) __random random.c:297 (COND_BWD CROSS_2M cycles:1) __random random.c:295 (cycles:1) __random random.c:295 (COND_BWD CROSS_2M cycles:1) __random random.c:295 (cycles:1) __random random.c:295 (RET CROSS_2M cycles:9) . Beautify the fcntl syscall, which is an interesting one in the sense that infrastructure had to be put in place to change the formatters of some arguments according to the value in a previous one, i.e. cmd dictates how arg and the syscall return will be formatted. (Arnaldo Carvalho de Melo Infrastructure: . 'perf test attr' fixes (Jiri Olsa) Vendor events: - Add POWER9 PMU events Sukadev (Bhattiprolu) - Support additional POWER8+ PVR in PMU mapfile (Shriya) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJZbsEtAAoJENZQFvNTUqpA0rIP/j8pJ2uzOpaAqioWsqrVAY1q y1ezQxv9z6Saifa4nd8Li2fAoYMi7JeMQaTWl9GahNypTyafjWGn/i8Of0ajHh4m iRrEWEXh6DmSfHjt1Kh4hdFUQ+Au2p52Rcdu1BUnQR0+y9CJpaCuktnnkkp1bNq6 U56GKU/c5lXdHZtBenX86712eTZcG+ZfucdlhsZOdXEzgLtlkjbKtZ50wIt+tLjO dVg22hKoDDF71sxzakiSQQR8VrUrhlygd5jP3L62W2i1inVjJTGJ1rGyPOtBandX pqFitDLkZn8CzpBq4snzrUtctDLevsyy27YqPMRKbErmtnhGtTARm3utFvJkqFPE YNVYDf5Clnw9SCimY0GQE5OF9ZnmmIHzJp7Tu4cD3fVb6FTDf5q6Xy9Vlc5oOKDe ea+EEwXEeJPLZKfIuwW3osK7ukmDtN+KDO52Fw4etkvdDwzitXqLT4vDWSz3tLxj bFMr5g07cZ5t/7+0/fDfQJHhpeg5yEbNIcIkkYfEMwNFUBTLjoMoB67CNnCpa/d8 2PMsw6BEoGUV4tigI2L9jEkEiZwqIu51tgRlOHn1BZzW192egF/1R+pj4vrsZxM9 D2T98CEsbgJ1+NHXfALMcwhEsGBy3iQ34qyUpCeQi5+t/T3lCoyCJ6jRPjUC4deN +zlBbJNNNRcV53w08koC =eFUO -----END PGP SIGNATURE----- Merge tag 'perf-core-for-mingo-4.13-20170718' 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: User visible changes: - Initial support for namespaces, using setns to access files in namespaces, grabbing their build-ids, etc. We still need to work more to deal with namespaces that vanish before we can get the needed data to do analysis, but this should be as good as what is in bcc now (Krister Johansen) - Add header record types to pipe-mode, now this command: $ perf record -o - -e cycles sleep 1 | perf report --stdio --header Will show the same as in non-pipe mode, i.e. involving a perf.data file (David Carrillo-Cisneros) - Implement a visual marker for fused x86 instructions in the annotate TUI browser, available now in 'perf report', more work needed to have it available as well in 'perf top' (Jin Yao) Further explanation from one of Jin's patches: │ ┌──cmpl $0x0,argp_program_version_hook 81.93 │ ├──je 20 │ │ lock cmpxchg %esi,0x38a9a4(%rip) │ │↓ jne 29 │ │↓ jmp 43 11.47 │20:└─→cmpxch %esi,0x38a999(%rip) That means the cmpl+je is a fused instruction pair and they should be considered together. - Record the branch type and then show statistics and info about in callchain entries (Jin Yao) Example from one of Jin's patches: # perf record -g -j any,save_type # perf report --branch-history --stdio --no-children 38.50% div.c:45 [.] main div | ---main div.c:42 (RET CROSS_2M cycles:2) compute_flag div.c:28 (cycles:2) compute_flag div.c:27 (RET CROSS_2M cycles:1) rand rand.c:28 (cycles:1) rand rand.c:28 (RET CROSS_2M cycles:1) __random random.c:298 (cycles:1) __random random.c:297 (COND_BWD CROSS_2M cycles:1) __random random.c:295 (cycles:1) __random random.c:295 (COND_BWD CROSS_2M cycles:1) __random random.c:295 (cycles:1) __random random.c:295 (RET CROSS_2M cycles:9) - Beautify the fcntl syscall, which is an interesting one in the sense that infrastructure had to be put in place to change the formatters of some arguments according to the value in a previous one, i.e. cmd dictates how arg and the syscall return will be formatted. (Arnaldo Carvalho de Melo Infrastructure changes: - 'perf test attr' fixes (Jiri Olsa) Vendor events changes: - Add POWER9 PMU events Sukadev (Bhattiprolu) - Support additional POWER8+ PVR in PMU mapfile (Shriya) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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