Commit-ID: d7e404af115bb4996afa4a0236020969ab007554 Gitweb: http://git.kernel.org/tip/d7e404af115bb4996afa4a0236020969ab007554 Author: Wang Nan <[email protected]> AuthorDate: Tue, 6 Sep 2016 04:58:29 +0000 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Thu, 8 Sep 2016 12:36:01 -0300
perf record: Mark MAP_HUGETLB when synthesizing mmap events When synthesizing mmap events, add MAP_HUGETLB map flag if the source of mapping is file in hugetlbfs. After this patch, perf can identify hugetlb mapping even if perf is started after the mapping of huge pages (like with 'perf top'). Signed-off-by: Wang Nan <[email protected]> Reviewed-by: Nilay Vaish <[email protected]> Cc: He Kuang <[email protected]> Cc: Hou Pengyang <[email protected]> Cc: Zefan Li <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/event.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 9ad7d32..6c30171 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -1,5 +1,6 @@ #include <linux/types.h> #include <sys/mman.h> +#include <api/fs/fs.h> #include "event.h" #include "debug.h" #include "hist.h" @@ -248,6 +249,10 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool, bool truncation = false; unsigned long long timeout = proc_map_timeout * 1000000ULL; int rc = 0; +#ifdef MAP_HUGETLB + const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); + int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; +#endif if (machine__is_default_guest(machine)) return 0; @@ -342,6 +347,12 @@ out: if (!strcmp(execname, "")) strcpy(execname, anonstr); +#ifdef MAP_HUGETLB + if (!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { + strcpy(execname, anonstr); + event->mmap2.flags |= MAP_HUGETLB; + } +#endif size = strlen(execname) + 1; memcpy(event->mmap2.filename, execname, size);
