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static-delta: Add --disable-bsdiff option 

A builder may not want to pay the CPU penalty.  Also it's useful for
evaluating performance.
This commit is contained in:
Colin Walters 2015-03-02 18:31:23 -05:00
parent 9843c4c245
commit 392929d9bc
2 changed files with 28 additions and 6 deletions
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29
src/libostree/ostree-repo-static-delta-compilation.c
View File

@ -848,10 +848,16 @@ process_one_bsdiff (OstreeRepo *repo,
return ret;
}
typedef enum {
DELTAOPT_FLAG_NONE = (1 << 0),
DELTAOPT_FLAG_DISABLE_BSDIFF = (1 << 1)
} DeltaOpts;
static gboolean
generate_delta_lowlatency (OstreeRepo *repo,
const char *from,
const char *to,
DeltaOpts opts,
OstreeStaticDeltaBuilder *builder,
GCancellable *cancellable,
GError **error)
@ -988,12 +994,15 @@ generate_delta_lowlatency (OstreeRepo *repo,
continue;
}
if (!try_content_bsdiff (repo, from_checksum, to_checksum,
&bsdiff, cancellable, error))
goto out;
if (!(opts & DELTAOPT_FLAG_DISABLE_BSDIFF))
{
if (!try_content_bsdiff (repo, from_checksum, to_checksum,
&bsdiff, cancellable, error))
goto out;
if (bsdiff)
g_hash_table_insert (bsdiff_optimized_content_objects, g_strdup (to_checksum), bsdiff);
if (bsdiff)
g_hash_table_insert (bsdiff_optimized_content_objects, g_strdup (to_checksum), bsdiff);
}
}
g_printerr ("rollsum for %u/%u modified\n",
@ -1215,6 +1224,7 @@ ostree_repo_static_delta_generate (OstreeRepo *self,
guint min_fallback_size;
guint max_chunk_size;
GVariant *metadata_source;
DeltaOpts delta_opts = DELTAOPT_FLAG_NONE;
guint64 total_compressed_size = 0;
guint64 total_uncompressed_size = 0;
gs_unref_variant_builder GVariantBuilder *part_headers = NULL;
@ -1238,12 +1248,19 @@ ostree_repo_static_delta_generate (OstreeRepo *self,
max_chunk_size = 32;
builder.max_chunk_size_bytes = ((guint64)max_chunk_size) * 1000 * 1000;
{ gboolean use_bsdiff;
if (!g_variant_lookup (params, "bsdiff-enabled", "b", &use_bsdiff))
use_bsdiff = TRUE;
if (!use_bsdiff)
delta_opts |= DELTAOPT_FLAG_DISABLE_BSDIFF;
}
if (!ostree_repo_load_variant (self, OSTREE_OBJECT_TYPE_COMMIT, to,
&to_commit, error))
goto out;
/* Ignore optimization flags */
if (!generate_delta_lowlatency (self, from, to, &builder,
if (!generate_delta_lowlatency (self, from, to, delta_opts, &builder,
cancellable, error))
goto out;

5
src/ostree/ot-builtin-static-delta.c
View File

@ -33,6 +33,7 @@ static char *opt_gpg_homedir;
static char *opt_min_fallback_size;
static char *opt_max_chunk_size;
static gboolean opt_empty;
static gboolean opt_disable_bsdiff;
#define BUILTINPROTO(name) static gboolean ot_static_delta_builtin_ ## name (int argc, char **argv, GCancellable *cancellable, GError **error)
@ -54,6 +55,7 @@ static GOptionEntry generate_options[] = {
{ "from", 0, 0, G_OPTION_ARG_STRING, &opt_from_rev, "Create delta from revision REV", "REV" },
{ "empty", 0, 0, G_OPTION_ARG_NONE, &opt_empty, "Create delta from scratch", NULL },
{ "to", 0, 0, G_OPTION_ARG_STRING, &opt_to_rev, "Create delta to revision REV", "REV" },
{ "disable-bsdiff", 0, 0, G_OPTION_ARG_NONE, &opt_disable_bsdiff, "Disable use of bsdiff", NULL },
{ "gpg-sign", 0, 0, G_OPTION_ARG_STRING_ARRAY, &opt_key_ids, "GPG Key ID to sign the delta with", "key-id"},
{ "gpg-homedir", 0, 0, G_OPTION_ARG_STRING, &opt_gpg_homedir, "GPG Homedir to use when looking for keyrings", "homedir"},
{ "min-fallback-size", 0, 0, G_OPTION_ARG_STRING, &opt_min_fallback_size, "Minimum uncompressed size in megabytes for individual HTTP request", NULL},
@ -192,6 +194,9 @@ ot_static_delta_builtin_generate (int argc, char **argv, GCancellable *cancellab
if (opt_max_chunk_size)
g_variant_builder_add (parambuilder, "{sv}",
"max-chunk-size", g_variant_new_uint32 (g_ascii_strtoull (opt_max_chunk_size, NULL, 10)));
if (opt_disable_bsdiff)
g_variant_builder_add (parambuilder, "{sv}",
"bsdiff-enabled", g_variant_new_boolean (FALSE));
g_print ("Generating static delta:\n");
g_print (" From: %s\n", from_resolved ? from_resolved : "empty");