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7da36e94e7
linux_dsm_epyc7002/tools/perf
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Arnaldo Carvalho de Melo 7da36e94e7 perf evsel: Fix write_backwards fallback 
Commit b90dc17a5d "perf evsel: Add overwrite attribute and check
write_backward" misunderstood the 'order' should be obeyed in
__perf_evsel__open.

But the way this was done for attr.write_backwards was buggy, as we need
to check features in the inverse order of their introduction to the
kernel, so that a newer tool checks first the newest perf_event_attr
fields, detecting that the older kernel doesn't have support for them.

Also, we can avoid calling sys_perf_event_open() if we have already
detected the missing of write_backward.

Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Fixes: b90dc17a5d ("perf evsel: Add overwrite attribute and check write_backward")
Link: http://lkml.kernel.org/r/1466419645-75551-2-git-send-email-wangnan0@huawei.com
Link: http://lkml.kernel.org/r/20160616214724.GI13337@kernel.org
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-06-21 13:18:35 -03:00
..
arch perf/core improvements and fixes: 2016-06-08 09:34:15 +02:00
bench perf bench: Remove one more die() call 2016-04-26 13:28:40 -03:00
config kbuild: List libelf-devel as an alternative 2016-06-21 13:18:32 -03:00
Documentation perf record: Add --dry-run option to check cmdline options 2016-06-21 13:18:35 -03:00
jvmti perf jit: Add support for using TSC as a timestamp 2016-04-01 18:42:55 -03:00
python perf python: Support the PERF_RECORD_SWITCH event 2015-10-07 19:41:50 -03:00
scripts perf script: Update export-to-postgresql to support callchain export 2016-05-06 13:00:55 -03:00
tests perf hists: Rename __hists__add_entry to hists__add_entry 2016-06-21 13:18:33 -03:00
trace perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/ 2016-05-11 13:06:00 -03:00
ui perf hists: Replace perf_evsel arg perf_hpp_fmt's width callback 2016-06-15 10:50:04 -03:00
util perf evsel: Fix write_backwards fallback 2016-06-21 13:18:35 -03:00
.gitignore perf tools: Add arch/*/include/generated/ to .gitignore 2016-05-30 12:41:46 -03:00
Build perf tools: Set and pass DOCDIR to builtin-report.c 2016-01-12 12:42:07 -03:00
builtin-annotate.c perf hists: Rename __hists__add_entry to hists__add_entry 2016-06-21 13:18:33 -03:00
builtin-bench.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-buildid-cache.c perf symbols: Introduce DSO__NAME_KALLSYMS and DSO__NAME_KCORE 2016-05-16 23:11:48 -03:00
builtin-buildid-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-config.c perf config: Make show_config() use perf_config_set 2016-04-14 09:15:47 -03:00
builtin-data.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-diff.c perf hists: Rename __hists__add_entry to hists__add_entry 2016-06-21 13:18:33 -03:00
builtin-evlist.c perf evlist: Add --trace-fields option to show trace fields 2016-01-08 14:23:02 -03:00
builtin-help.c perf help: Make check_emacsclient_version to check strbuf APIs 2016-05-10 11:56:14 -03:00
builtin-inject.c perf tools: Add time conversion event 2016-03-31 10:52:24 -03:00
builtin-kmem.c perf callchain: Start moving away from global per thread cursors 2016-04-14 14:48:07 -03:00
builtin-kvm.c perf evsel: Do not use globals in config() 2016-04-11 22:18:20 -03:00
builtin-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-lock.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-mem.c perf mem: Add --ldlat option 2016-06-15 10:35:27 -03:00
builtin-probe.c perf probe: Add --cache option to cache the probe definitions 2016-06-15 14:34:42 -03:00
builtin-record.c perf record: Add --dry-run option to check cmdline options 2016-06-21 13:18:35 -03:00
builtin-report.c perf stdio: Add use_callchain parameter to hists__fprintf 2016-06-15 10:48:02 -03:00
builtin-sched.c perf sched map: Display only given cpus 2016-04-13 10:11:52 -03:00
builtin-script.c perf script: Show call graphs when 1st event doesn't have it but some other has 2016-06-03 14:53:46 -03:00
builtin-stat.c perf stat: Add missing aggregation headers for --metric-only CSV 2016-06-06 17:43:12 -03:00
builtin-timechart.c perf tools: Set buildid dir under symfs when --symfs is provided 2016-05-20 11:43:58 -03:00
builtin-top.c perf stdio: Add use_callchain parameter to hists__fprintf 2016-06-15 10:48:02 -03:00
builtin-trace.c perf trace: Use the ptr->name beautifier as default for "filename" args 2016-05-23 16:41:00 -03:00
builtin-version.c perf tools: Move cmd_version() to builtin-version.c 2015-12-09 13:42:03 -03:00
builtin.h perf tools: Remove needless 'extern' from function prototypes 2016-03-23 15:06:35 -03:00
command-list.txt perf tools: Do not show trace command if it's not compiled in 2016-01-08 12:46:17 -03:00
CREDITS
design.txt
Makefile perf build tests: Do parallell builds with 'build-test' 2016-02-04 15:57:00 -03:00
Makefile.perf perf tools: Build syscall table .c header from kernel's syscall_64.tbl 2016-04-08 09:58:14 -03:00
MANIFEST perf bench: Fix detached tarball building due to missing 'perf bench memcpy' headers 2016-03-24 12:28:57 -03:00
perf-archive.sh
perf-completion.sh perf tools: Avoid confusion with preloaded bash function for perf bash completion 2015-03-19 13:53:27 -03:00
perf-read-vdso.c
perf-sys.h perf tools: Move generic barriers out of perf-sys.h 2015-05-08 16:05:08 -03:00
perf-with-kcore.sh perf tools: Fix perf-with-kcore handling of arguments containing spaces 2015-08-06 16:48:27 -03:00
perf.c perf tools: Remove --perf-dir and --work-dir 2016-06-21 13:18:34 -03:00
perf.h perf tools: Ditch record_opts.callgraph_set 2016-04-18 12:26:27 -03:00