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pull: Ensure queued filemeta requests don't starve everything else 

We need this hack for "archive mode" repositories; otherwise,
what ends up happening is that we get 10000+ requests pending
for .filemeta files, which we can't process until we also get
the .filecontent.

Note this hack is unneccessary when fetching from archive-z
repositories.
This commit is contained in:
Colin Walters 2012-10-04 18:23:18 -04:00
parent 4e51701bea
commit f1b4db15a2
1 changed files with 48 additions and 16 deletions
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64
src/ostree/ostree-pull.c
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@ -100,6 +100,7 @@ typedef struct {
guint n_fetched_metadata;
guint outstanding_uri_requests;
GQueue queued_filemeta;
GThread *metadata_scan_thread;
OtWorkerQueue *metadata_objects_to_scan;
GHashTable *scanned_metadata; /* Maps object name to itself */
@ -583,6 +584,33 @@ content_fetch_on_checksum_complete (GObject *object,
destroy_fetch_one_content_item_data (data);
}
static void
content_fetch_on_complete (GObject *object,
GAsyncResult *result,
gpointer user_data);
static void
process_one_file_request (OtFetchOneContentItemData *data)
{
OtPullData *pull_data = data->pull_data;
const char *checksum = data->checksum;
gboolean compressed = pull_data->remote_mode == OSTREE_REPO_MODE_ARCHIVE_Z;
ot_lfree char *objpath = NULL;
SoupURI *obj_uri = NULL;
objpath = ostree_get_relative_object_path (checksum, OSTREE_OBJECT_TYPE_FILE, compressed);
obj_uri = suburi_new (pull_data->base_uri, objpath, NULL);
ostree_fetcher_request_uri_async (pull_data->fetcher, obj_uri, pull_data->cancellable,
content_fetch_on_complete, data);
soup_uri_free (obj_uri);
if (compressed)
pull_data->outstanding_filecontent_requests++;
else
pull_data->outstanding_filemeta_requests++;
}
static void
content_fetch_on_complete (GObject *object,
GAsyncResult *result,
@ -690,6 +718,16 @@ content_fetch_on_complete (GObject *object,
content_fetch_on_checksum_complete, data);
}
while (data->pull_data->outstanding_filemeta_requests < 10)
{
OtFetchOneContentItemData *queued_data = g_queue_pop_head (&data->pull_data->queued_filemeta);
if (!queued_data)
break;
process_one_file_request (queued_data);
}
out:
if (was_content_fetch)
data->pull_data->outstanding_filecontent_requests--;
@ -703,23 +741,17 @@ idle_queue_content_request (gpointer user_data)
{
OtFetchOneContentItemData *data = user_data;
OtPullData *pull_data = data->pull_data;
const char *checksum = data->checksum;
ot_lfree char *objpath = NULL;
SoupURI *obj_uri = NULL;
gboolean compressed = pull_data->remote_mode == OSTREE_REPO_MODE_ARCHIVE_Z;
objpath = ostree_get_relative_object_path (checksum, OSTREE_OBJECT_TYPE_FILE, compressed);
obj_uri = suburi_new (pull_data->base_uri, objpath, NULL);
ostree_fetcher_request_uri_async (pull_data->fetcher, obj_uri, pull_data->cancellable,
content_fetch_on_complete, data);
soup_uri_free (obj_uri);
if (compressed)
pull_data->outstanding_filecontent_requests++;
/* Don't allow file meta requests to back up everything else */
if (pull_data->outstanding_filemeta_requests > 10)
{
g_queue_push_tail (&pull_data->queued_filemeta, data);
}
else
pull_data->outstanding_filemeta_requests++;
{
process_one_file_request (data);
}
ot_worker_queue_release (pull_data->metadata_objects_to_scan);
return FALSE;