Commit 4cde998d authored Sep 09, 2015 by Arnaldo Carvalho de Melo

perf machine: Add pointer to sample's environment



The 'struct machine' represents the machine where the samples were/are
being collected, and we also have a 'struct perf_env' with extra details
about such machine, that we were collecting at 'perf.data' creation time
but we also needed when no perf.data file is being used, such as in
'perf top'.

So, get those structs closer together, as they provide a bigger picture
of the sample's environment.

In 'perf session', when the file argument is NULL, we can assume that
the tool is sampling the running machine, so point machine->env to
the global put in place in previous patches, while set it to the
perf_header.env one when reading from a file.

This paves the way for machine->env to be used in
perf_event__preprocess_sample to populate addr_location.socket.

Tested-by: Wang Nan <wangnan0@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2ajotl0khscutm68exictoy9@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent aa36ddd7

tools/perf/util/header.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2564,6 +2564,7 @@ int perf_session__read_header(struct perf_session *session)
		return -ENOMEM;

		session->evlist->env = &header->env;
		session->machines.host.env = &header->env;
		if (perf_data_file__is_pipe(file))
		return perf_header__read_pipe(session);

tools/perf/util/machine.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@ int machine__init(struct machine machine, const char root_dir, pid_t pid)
		machine->last_match = NULL;

		machine->vdso_info = NULL;
		machine->env = NULL;

		machine->pid = pid;

tools/perf/util/machine.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ struct machine {
		struct list_head dead_threads;
		struct thread *last_match;
		struct vdso_info *vdso_info;
		struct perf_env *env;
		struct dsos dsos;
		struct map_groups kmaps;
		struct map *vmlinux_maps[MAP__NR_TYPES];

tools/perf/util/session.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -138,6 +138,8 @@ struct perf_session perf_session__new(struct perf_data_file file,
		perf_session__set_id_hdr_size(session);
		perf_session__set_comm_exec(session);
		}
		} else {
		session->machines.host.env = &perf_env;
		}

		if (!file \|\| perf_data_file__is_write(file)) {

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