perf auxtrace: Add auxtrace_cache__remove() (fd62c109) · Commits · 戴 / test

Add auxtrace_cache__remove(). Intel PT uses an auxtrace_cache to store the results of code-walking, so that the same block of instructions does not have to be decoded repeatedly. However, when there are text poke events, the associated cache entries need to be removed. Signed-off-by:

Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: x86@kernel.org Link: http://lore.kernel.org/lkml/20191025130000.13032-6-adrian.hunter@intel.com Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/auxtrace.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -1457,6 +1457,34 @@ int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
		return 0;
		}

		static struct auxtrace_cache_entry auxtrace_cache__rm(struct auxtrace_cache c,
		u32 key)
		{
		struct auxtrace_cache_entry *entry;
		struct hlist_head *hlist;
		struct hlist_node *n;

		if (!c)
		return NULL;

		hlist = &c->hashtable[hash_32(key, c->bits)];
		hlist_for_each_entry_safe(entry, n, hlist, hash) {
		if (entry->key == key) {
		hlist_del(&entry->hash);
		return entry;
		}
		}

		return NULL;
		}

		void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key)
		{
		struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key);

		auxtrace_cache__free_entry(c, entry);
		}

		void auxtrace_cache__lookup(struct auxtrace_cache c, u32 key)
		{
		struct auxtrace_cache_entry *entry;

tools/perf/util/auxtrace.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -489,6 +489,7 @@ void auxtrace_cache__alloc_entry(struct auxtrace_cache c);
		void auxtrace_cache__free_entry(struct auxtrace_cache c, void entry);
		int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
		struct auxtrace_cache_entry *entry);
		void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key);
		void auxtrace_cache__lookup(struct auxtrace_cache c, u32 key);

		struct auxtrace_record auxtrace_record__init(struct evlist evlist,

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