[PATCH v9 02/15] tools/libperf: add properties to struct pollfd *entries objects

From: Alexey Budankov
Date: Fri Jul 03 2020 - 03:41:52 EST


Store boolean properties per struct pollfd *entries object in a
bitmap of int size. Implement fdarray_prop__nonfilterable property
to skip object from counting by fdarray_filter().

Signed-off-by: Alexey Budankov <alexey.budankov@xxxxxxxxxxxxxxx>
---
tools/lib/api/fd/array.c | 17 +++++++++--------
tools/lib/api/fd/array.h | 18 +++++++++++++-----
tools/lib/perf/evlist.c | 10 +++++-----
tools/lib/perf/include/internal/evlist.h | 2 +-
tools/perf/tests/fdarray.c | 2 +-
tools/perf/util/evlist.c | 2 +-
6 files changed, 30 insertions(+), 21 deletions(-)

diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c
index 89f9a2193c2d..a4223f8cb1ce 100644
--- a/tools/lib/api/fd/array.c
+++ b/tools/lib/api/fd/array.c
@@ -12,31 +12,31 @@
void fdarray__init(struct fdarray *fda, int nr_autogrow)
{
fda->entries = NULL;
- fda->priv = NULL;
+ fda->prop = NULL;
fda->nr = fda->nr_alloc = 0;
fda->nr_autogrow = nr_autogrow;
}

int fdarray__grow(struct fdarray *fda, int nr)
{
- void *priv;
+ void *prop;
int nr_alloc = fda->nr_alloc + nr;
- size_t psize = sizeof(fda->priv[0]) * nr_alloc;
+ size_t psize = sizeof(fda->prop[0]) * nr_alloc;
size_t size = sizeof(struct pollfd) * nr_alloc;
struct pollfd *entries = realloc(fda->entries, size);

if (entries == NULL)
return -ENOMEM;

- priv = realloc(fda->priv, psize);
- if (priv == NULL) {
+ prop = realloc(fda->prop, psize);
+ if (prop == NULL) {
free(entries);
return -ENOMEM;
}

fda->nr_alloc = nr_alloc;
fda->entries = entries;
- fda->priv = priv;
+ fda->prop = prop;
return 0;
}

@@ -59,7 +59,7 @@ struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow)
void fdarray__exit(struct fdarray *fda)
{
free(fda->entries);
- free(fda->priv);
+ free(fda->prop);
fdarray__init(fda, 0);
}

@@ -69,7 +69,7 @@ void fdarray__delete(struct fdarray *fda)
free(fda);
}

-int fdarray__add(struct fdarray *fda, int fd, short revents)
+int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_props props)
{
int pos = fda->nr;

@@ -79,6 +79,7 @@ int fdarray__add(struct fdarray *fda, int fd, short revents)

fda->entries[fda->nr].fd = fd;
fda->entries[fda->nr].events = revents;
+ fda->prop[fda->nr].bits = props;
fda->nr++;
return pos;
}
diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h
index b39557d1a88f..19b6a34aeea5 100644
--- a/tools/lib/api/fd/array.h
+++ b/tools/lib/api/fd/array.h
@@ -21,10 +21,18 @@ struct fdarray {
int nr_alloc;
int nr_autogrow;
struct pollfd *entries;
- union {
- int idx;
- void *ptr;
- } *priv;
+ struct {
+ union {
+ int idx;
+ void *ptr;
+ } priv;
+ int bits;
+ } *prop;
+};
+
+enum fdarray_props {
+ fdarray_prop__default = 0x00000000,
+ fdarray_prop__nonfilterable = 0x00000001
};

void fdarray__init(struct fdarray *fda, int nr_autogrow);
@@ -33,7 +41,7 @@ void fdarray__exit(struct fdarray *fda);
struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow);
void fdarray__delete(struct fdarray *fda);

-int fdarray__add(struct fdarray *fda, int fd, short revents);
+int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_props props);
int fdarray__poll(struct fdarray *fda, int timeout);
int fdarray__filter(struct fdarray *fda, short revents,
void (*entry_destructor)(struct fdarray *fda, int fd, void *arg),
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index 6a875a0f01bb..25e76e458afb 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -305,12 +305,12 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
}

int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
- void *ptr, short revent)
+ void *ptr, short revent, enum fdarray_props props)
{
- int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP);
+ int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP, props);

if (pos >= 0) {
- evlist->pollfd.priv[pos].ptr = ptr;
+ evlist->pollfd.prop[pos].priv.ptr = ptr;
fcntl(fd, F_SETFL, O_NONBLOCK);
}

@@ -320,7 +320,7 @@ int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
void *arg __maybe_unused)
{
- struct perf_mmap *map = fda->priv[fd].ptr;
+ struct perf_mmap *map = fda->prop[fd].priv.ptr;

if (map)
perf_mmap__put(map);
@@ -488,7 +488,7 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
revent = !overwrite ? POLLIN : 0;

if (!evsel->system_wide &&
- perf_evlist__add_pollfd(evlist, fd, map, revent) < 0) {
+ perf_evlist__add_pollfd(evlist, fd, map, revent, fdarray_prop__default) < 0) {
perf_mmap__put(map);
return -1;
}
diff --git a/tools/lib/perf/include/internal/evlist.h b/tools/lib/perf/include/internal/evlist.h
index 74dc8c3f0b66..87bc0fa7293c 100644
--- a/tools/lib/perf/include/internal/evlist.h
+++ b/tools/lib/perf/include/internal/evlist.h
@@ -45,7 +45,7 @@ struct perf_evlist_mmap_ops {

int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
- void *ptr, short revent);
+ void *ptr, short revent, enum fdarray_props props);

int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_evlist_mmap_ops *ops,
diff --git a/tools/perf/tests/fdarray.c b/tools/perf/tests/fdarray.c
index d0c8a05aab2f..b573f386ab2f 100644
--- a/tools/perf/tests/fdarray.c
+++ b/tools/perf/tests/fdarray.c
@@ -112,7 +112,7 @@ int test__fdarray__add(struct test *test __maybe_unused, int subtest __maybe_unu
}

#define FDA_ADD(_idx, _fd, _revents, _nr) \
- if (fdarray__add(fda, _fd, _revents) < 0) { \
+ if (fdarray__add(fda, _fd, _revents, fdarray_prop__default) < 0) { \
pr_debug("\n%d: fdarray__add(fda, %d, %d) failed!", \
__LINE__,_fd, _revents); \
goto out_delete; \
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1b884695b4d3..7b1beffec6a1 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -497,7 +497,7 @@ int perf_evlist__enable_event_idx(struct evlist *evlist,

int evlist__add_pollfd(struct evlist *evlist, int fd)
{
- return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN);
+ return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, fdarray_prop__default);
}

int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
--
2.24.1