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authorOvidiu Panait <ovidiu.panait@windriver.com>2021-04-29 22:57:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 11:20:39 -0700
commitf9001107820c647f65b57fb9c1ca2c0908b5fede (patch)
tree9c4e03d18638cdb5e4013cf999ca50e09ee184a5 /include/trace
parentfaf1c0008a33d4ac6336f63a358641cf86926fc0 (diff)
mm, tracing: improve rss_stat tracepoint message
Adjust the rss_stat tracepoint to print the name of the resident page type that got updated (e.g. MM_ANONPAGES/MM_FILEPAGES), rather than the numeric index corresponding to it (the __entry->member value): Before this patch: ------------------ rss_stat: mm_id=1216113068 curr=0 member=1 size=28672B rss_stat: mm_id=1216113068 curr=0 member=1 size=0B rss_stat: mm_id=534402304 curr=1 member=0 size=188416B rss_stat: mm_id=534402304 curr=1 member=1 size=40960B After this patch: ----------------- rss_stat: mm_id=1726253524 curr=1 type=MM_ANONPAGES size=40960B rss_stat: mm_id=1726253524 curr=1 type=MM_FILEPAGES size=663552B rss_stat: mm_id=1726253524 curr=1 type=MM_ANONPAGES size=65536B rss_stat: mm_id=1726253524 curr=1 type=MM_FILEPAGES size=647168B Use TRACE_DEFINE_ENUM()/__print_symbolic() logic to map the enum values to the strings they represent, so that userspace tools can also parse the raw data correctly. Link: https://lkml.kernel.org/r/20210310162305.4862-1-ovidiu.panait@windriver.com Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com> Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/kmem.h24
1 files changed, 22 insertions, 2 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 3a60b6b6db32..829a75692cc0 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -343,6 +343,26 @@ static unsigned int __maybe_unused mm_ptr_to_hash(const void *ptr)
#define __PTR_TO_HASHVAL
#endif
+#define TRACE_MM_PAGES \
+ EM(MM_FILEPAGES) \
+ EM(MM_ANONPAGES) \
+ EM(MM_SWAPENTS) \
+ EMe(MM_SHMEMPAGES)
+
+#undef EM
+#undef EMe
+
+#define EM(a) TRACE_DEFINE_ENUM(a);
+#define EMe(a) TRACE_DEFINE_ENUM(a);
+
+TRACE_MM_PAGES
+
+#undef EM
+#undef EMe
+
+#define EM(a) { a, #a },
+#define EMe(a) { a, #a }
+
TRACE_EVENT(rss_stat,
TP_PROTO(struct mm_struct *mm,
@@ -365,10 +385,10 @@ TRACE_EVENT(rss_stat,
__entry->size = (count << PAGE_SHIFT);
),
- TP_printk("mm_id=%u curr=%d member=%d size=%ldB",
+ TP_printk("mm_id=%u curr=%d type=%s size=%ldB",
__entry->mm_id,
__entry->curr,
- __entry->member,
+ __print_symbolic(__entry->member, TRACE_MM_PAGES),
__entry->size)
);
#endif /* _TRACE_KMEM_H */