util/cbfstool: Add cbfs-compression-tool

cbfs-compression-tool provides a way to benchmark the compression
algorithms as used by cbfstool (and coreboot) and allows to
pre-compress data for later consumption by cbfstool (once it supports
the format).

For an impression, the benchmark's results on my machine:

measuring 'none'
compressing 10485760 bytes to 10485760 took 0 seconds
measuring 'LZMA'
compressing 10485760 bytes to 1736 took 2 seconds
measuring 'LZ4'
compressing 10485760 bytes to 41880 took 0 seconds

And a possible use for external compression, parallel and non-parallel
(60MB in 53 files compressed to 650KB on a machine with 40 threads):

$ time (ls -1 *.* |xargs -n 1 -P $(nproc) -I '{}' cbfs-compression-tool compress '{}' out/'{}' LZMA)

real	0m0.786s
user	0m11.440s
sys	0m0.044s

$ time (ls -1 *.* |xargs -n 1 -P 1 -I '{}' cbfs-compression-tool compress '{}' out/'{}' LZMA)

real	0m10.444s
user	0m10.280s
sys	0m0.064s

Change-Id: I40be087e85d09a895b1ed277270350ab65a4d6d4
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/18099
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/util/cbfstool/common.h b/util/cbfstool/common.h
index d4b70214287a..85dfdeb5894a 100644
--- a/util/cbfstool/common.h
+++ b/util/cbfstool/common.h
@@ -166,6 +166,18 @@ enum comp_algo {
 	CBFS_COMPRESS_LZ4 = 2,
 };
 
+struct typedesc_t {
+	uint32_t type;
+	const char *name;
+};
+
+static const struct typedesc_t types_cbfs_compression[] = {
+	{CBFS_COMPRESS_NONE, "none"},
+	{CBFS_COMPRESS_LZMA, "LZMA"},
+	{CBFS_COMPRESS_LZ4, "LZ4"},
+	{0, NULL},
+};
+
 comp_func_ptr compression_function(enum comp_algo algo);
 decomp_func_ptr decompression_function(enum comp_algo algo);