@@ -177,6 +177,7 @@ struct tracecmd_input {
bool cpu_compressed;
int file_version;
unsigned int cpustats_size;
+ struct cpu_zdata latz;
struct cpu_data *cpu_data;
long long ts_offset;
struct tsc2nsec tsc_calc;
@@ -3465,20 +3466,52 @@ static int read_options_type(struct tracecmd_input *handle)
int tracecmd_latency_data_read(struct tracecmd_input *handle, char **buf, size_t *size)
{
+ struct cpu_zdata *zdata = &handle->latz;
+ void *data;
+ int rsize;
+ int fd = -1;
+ int id;
+
if (!handle || !buf || !size)
return -1;
if (handle->file_state != TRACECMD_FILE_CPU_LATENCY)
return -1;
- /* Read data from a file */
- if (!(*buf)) {
- *size = BUFSIZ;
- *buf = malloc(*size);
- if (!(*buf))
+ if (!handle->cpu_compressed) {
+ fd = handle->fd;
+ } else if (!handle->read_zpage) {
+ if (zdata->fd < 0)
return -1;
+ fd = zdata->fd;
}
- return do_read(handle, *buf, *size);
+ /* Read data from a file */
+ if (fd >= 0) {
+ if (!(*buf)) {
+ *size = BUFSIZ;
+ *buf = malloc(*size);
+ if (!(*buf))
+ return -1;
+ }
+ return do_read_fd(fd, *buf, *size);
+ }
+
+ /* Uncompress data in memory */
+ if (zdata->last_chunk >= zdata->count)
+ return 0;
+ id = zdata->last_chunk;
+ if (!*buf || *size < zdata->chunks[id].size) {
+ data = realloc(*buf, zdata->chunks[id].size);
+ if (!data)
+ return -1;
+ *buf = data;
+ *size = zdata->chunks[id].size;
+ }
+ if (tracecmd_uncompress_chunk(handle->compress, &zdata->chunks[id], *buf))
+ return -1;
+ rsize = zdata->chunks[id].size;
+ zdata->last_chunk++;
+ return rsize;
}
static int init_cpu_data(struct tracecmd_input *handle)
@@ -3546,7 +3579,27 @@ static int init_cpu_data(struct tracecmd_input *handle)
int init_latency_data(struct tracecmd_input *handle)
{
- /* To do */
+ unsigned long long wsize;
+ int ret;
+
+ if (!handle->cpu_compressed)
+ return 0;
+
+ if (handle->read_zpage) {
+ handle->latz.count = tracecmd_load_chunks_info(handle->compress, &handle->latz.chunks);
+ if (handle->latz.count < 0)
+ return -1;
+ } else {
+ strcpy(handle->latz.file, COMPR_TEMP_FILE);
+ handle->latz.fd = mkstemp(handle->latz.file);
+ if (handle->latz.fd < 0)
+ return -1;
+ ret = tracecmd_uncompress_copy_to(handle->compress, handle->latz.fd, NULL, &wsize);
+ if (ret)
+ return -1;
+ lseek64(handle->latz.fd, 0, SEEK_SET);
+ }
+
return 0;
}
@@ -4058,6 +4111,7 @@ struct tracecmd_input *tracecmd_alloc_fd(int fd, int flags)
handle->fd = fd;
handle->ref = 1;
+ handle->latz.fd = -1;
/* By default, use usecs, unless told otherwise */
handle->flags |= TRACECMD_FL_IN_USECS;
@@ -4349,7 +4403,11 @@ void tracecmd_close(struct tracecmd_input *handle)
free(handle->strings);
free(handle->version);
close(handle->fd);
-
+ free(handle->latz.chunks);
+ if (handle->latz.fd >= 0) {
+ close(handle->latz.fd);
+ unlink(handle->latz.file);
+ }
while (handle->sections) {
del_sec = handle->sections;
handle->sections = handle->sections->next;
Extended the latency read logic for reading comperssed latency trace data. Both decompressing approaches are supported: in-memory and using temporary file. Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> --- lib/trace-cmd/trace-input.c | 74 +++++++++++++++++++++++++++++++++---- 1 file changed, 66 insertions(+), 8 deletions(-)