perf tools: Use O_LARGEFILE to open perf data file
Xiao Guangrong [Wed, 3 Feb 2010 03:53:14 +0000 (11:53 +0800)]
Open perf data file with O_LARGEFILE flag since its size is
easily larger that 2G.

For example:

 # rm -rf perf.data
 # ./perf kmem record sleep 300

 [ perf record: Woken up 0 times to write data ]
 [ perf record: Captured and wrote 3142.147 MB perf.data
 (~137282513 samples) ]

 # ll -h perf.data
 -rw------- 1 root root 3.1G .....

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B68F32A.9040203@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

tools/perf/builtin-record.c
tools/perf/util/header.c
tools/perf/util/session.c
tools/perf/util/trace-event-read.c

index eea5691..949167e 100644 (file)
@@ -5,6 +5,9 @@
  * (or a CPU, or a PID) into the perf.data output file - for
  * later analysis via perf report.
  */
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
 #include "builtin.h"
 
 #include "perf.h"
@@ -451,7 +454,7 @@ static int __cmd_record(int argc, const char **argv)
                append_file = 0;
        }
 
-       flags = O_CREAT|O_RDWR;
+       flags = O_CREAT|O_RDWR|O_LARGEFILE;
        if (append_file)
                file_new = 0;
        else
index 2bb2bdb..ed3efd7 100644 (file)
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
 #include <sys/types.h>
 #include <byteswap.h>
 #include <unistd.h>
@@ -382,7 +385,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
        sec_size = sizeof(*feat_sec) * nr_sections;
 
        sec_start = self->data_offset + self->data_size;
-       lseek(fd, sec_start + sec_size, SEEK_SET);
+       lseek64(fd, sec_start + sec_size, SEEK_SET);
 
        if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
                struct perf_file_section *trace_sec;
@@ -390,9 +393,9 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
                trace_sec = &feat_sec[idx++];
 
                /* Write trace info */
-               trace_sec->offset = lseek(fd, 0, SEEK_CUR);
+               trace_sec->offset = lseek64(fd, 0, SEEK_CUR);
                read_tracing_data(fd, attrs, nr_counters);
-               trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
+               trace_sec->size = lseek64(fd, 0, SEEK_CUR) - trace_sec->offset;
        }
 
 
@@ -402,17 +405,18 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
                buildid_sec = &feat_sec[idx++];
 
                /* Write build-ids */
-               buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
+               buildid_sec->offset = lseek64(fd, 0, SEEK_CUR);
                err = dsos__write_buildid_table(fd);
                if (err < 0) {
                        pr_debug("failed to write buildid table\n");
                        goto out_free;
                }
-               buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+               buildid_sec->size = lseek64(fd, 0, SEEK_CUR) -
+                                           buildid_sec->offset;
                dsos__cache_build_ids();
        }
 
-       lseek(fd, sec_start, SEEK_SET);
+       lseek64(fd, sec_start, SEEK_SET);
        err = do_write(fd, feat_sec, sec_size);
        if (err < 0)
                pr_debug("failed to write feature section\n");
@@ -506,7 +510,7 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit)
                pr_debug("failed to write perf header\n");
                return err;
        }
-       lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+       lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
 
        self->frozen = 1;
        return 0;
@@ -560,7 +564,7 @@ int perf_header__process_sections(struct perf_header *self, int fd,
 
        sec_size = sizeof(*feat_sec) * nr_sections;
 
-       lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+       lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
 
        if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
                goto out_free;
@@ -634,7 +638,7 @@ static int perf_file_section__process(struct perf_file_section *self,
                                      struct perf_header *ph,
                                      int feat, int fd)
 {
-       if (lseek(fd, self->offset, SEEK_SET) < 0) {
+       if (lseek64(fd, self->offset, SEEK_SET) < 0) {
                pr_debug("Failed to lseek to %Ld offset for feature %d, "
                         "continuing...\n", self->offset, feat);
                return 0;
index 8e7c189..cf91d09 100644 (file)
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
 #include <linux/kernel.h>
 
 #include <byteswap.h>
@@ -12,7 +15,7 @@ static int perf_session__open(struct perf_session *self, bool force)
 {
        struct stat input_stat;
 
-       self->fd = open(self->filename, O_RDONLY);
+       self->fd = open(self->filename, O_RDONLY|O_LARGEFILE);
        if (self->fd < 0) {
                pr_err("failed to open file: %s", self->filename);
                if (!strcmp(self->filename, "perf.data"))
index 1744422..ca3c26d 100644 (file)
@@ -83,7 +83,7 @@ static char *read_string(void)
        char *str = NULL;
        int size = 0;
        int i;
-       int r;
+       s64 r;
 
        for (;;) {
                r = read(input_fd, buf, BUFSIZ);
@@ -117,7 +117,7 @@ static char *read_string(void)
        i++;
 
        /* move the file descriptor to the end of the string */
-       r = lseek(input_fd, -(r - i), SEEK_CUR);
+       r = lseek64(input_fd, -(r - i), SEEK_CUR);
        if (r < 0)
                die("lseek");