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perf symbols: Rename kthreads to kmaps, using another abstraction for it

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Using a struct thread instance just to hold the kernel space maps
(vmlinux + modules) is overkill and confuses people trying to
understand the perf symbols abstractions.

The kernel maps are really present in all threads, i.e. the kernel
is a library, not a separate thread.

So introduce the 'map_groups' abstraction and use it for the kernel
maps, now in the kmaps global variable.

It, in turn, will move, together with the threads list to the
perf_file abstraction, so that we can support multiple perf_file
instances, needed by perf diff.

Brainstormed-with: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260550239-5372-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2009-12-11 14:50:36 -02:00
committed by Ingo Molnar
parent 58e9f94138
commit 9958e1f0ae
6 changed files with 108 additions and 87 deletions
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4
tools/perf/util/symbol.h
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@@ -113,8 +113,8 @@ size_t kernel_maps__fprintf(FILE *fp);
int symbol__init(struct symbol_conf *conf);
struct thread;
struct thread *kthread;
struct map_groups;
struct map_groups *kmaps;
extern struct list_head dsos__user, dsos__kernel;
extern struct dso *vdso;
#endif /* __PERF_SYMBOL */