From: Raphael Moreira Zinsly Date: Mon, 20 Apr 2020 20:55:38 +0000 (-0300) Subject: selftests/powerpc: Add README for GZIP engine tests X-Git-Tag: v5.10.7~2436^2~206 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=722c1963aba5a86778f7d044116e10e1c73e87a8;p=platform%2Fkernel%2Flinux-rpi.git selftests/powerpc: Add README for GZIP engine tests Include a README file with the instructions to use the testcases at selftests/powerpc/nx-gzip. Signed-off-by: Bulent Abali Signed-off-by: Raphael Moreira Zinsly Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200420205538.25181-6-rzinsly@linux.ibm.com --- diff --git a/tools/testing/selftests/powerpc/nx-gzip/99-nx-gzip.rules b/tools/testing/selftests/powerpc/nx-gzip/99-nx-gzip.rules new file mode 100644 index 0000000..5a71184 --- /dev/null +++ b/tools/testing/selftests/powerpc/nx-gzip/99-nx-gzip.rules @@ -0,0 +1 @@ +SUBSYSTEM=="nxgzip", KERNEL=="nx-gzip", MODE="0666" diff --git a/tools/testing/selftests/powerpc/nx-gzip/README b/tools/testing/selftests/powerpc/nx-gzip/README new file mode 100644 index 0000000..9809dba --- /dev/null +++ b/tools/testing/selftests/powerpc/nx-gzip/README @@ -0,0 +1,45 @@ +Test the nx-gzip function: +========================= + +Verify that following device exists: + /dev/crypto/nx-gzip +If you get a permission error run as sudo or set the device permissions: + sudo chmod go+rw /dev/crypto/nx-gzip +However, chmod may not survive across boots. You may create a udev file such +as: + /etc/udev/rules.d/99-nx-gzip.rules + + +To manually build and run: +$ gcc -O3 -I./include -o gzfht_test gzfht_test.c gzip_vas.c +$ gcc -O3 -I./include -o gunz_test gunz_test.c gzip_vas.c + + +Compress any file using Fixed Huffman mode. Output will have a .nx.gz suffix: +$ ./gzfht_test gzip_vas.c +file gzip_vas.c read, 6413 bytes +compressed 6413 to 3124 bytes total, crc32 checksum = abd15e8a + + +Uncompress the previous output. Output will have a .nx.gunzip suffix: +./gunz_test gzip_vas.c.nx.gz +gzHeader FLG 0 +00 00 00 00 04 03 +gzHeader MTIME, XFL, OS ignored +computed checksum abd15e8a isize 0000190d +stored checksum abd15e8a isize 0000190d +decomp is complete: fclose + + +Compare two files: +$ sha1sum gzip_vas.c.nx.gz.nx.gunzip gzip_vas.c +bf43e3c0c3651f5f22b6f9784cd9b1eeab4120b6 gzip_vas.c.nx.gz.nx.gunzip +bf43e3c0c3651f5f22b6f9784cd9b1eeab4120b6 gzip_vas.c + + +Note that the code here are intended for testing the nx-gzip hardware function. +They are not intended for demonstrating performance or compression ratio. +By being simplistic these selftests expect to allocate the entire set of source +and target pages in the memory so it needs enough memory to work. +For more information and source code consider using: +https://github.com/libnxz/power-gzip