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util/cbfstool: Add cbfs-compression-tool

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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>
This commit is contained in:
Patrick Georgi
2017-01-11 15:26:58 +01:00
committed by Patrick Georgi
parent 8474e7d7e8
commit c88d16baaf
6 changed files with 230 additions and 28 deletions
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9
util/cbfstool/cbfs_image.c
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@@ -50,15 +50,6 @@
* (old) cbfstool. */
#define CBFS_FILENAME_ALIGN (16)
/* Type and format */
static const struct typedesc_t types_cbfs_compression[] = {
{CBFS_COMPRESS_NONE, "none"},
{CBFS_COMPRESS_LZMA, "LZMA"},
{CBFS_COMPRESS_LZ4, "LZ4"},
{0, NULL},
};
static const char *lookup_name_by_type(const struct typedesc_t *desc, uint32_t type,
const char *default_value)
{