Negative value for Uncompressed ratio for genwqe_gzip test On Corsa PCI card

[hathyaga]

===> Tested genwqe_gzip with a 108GB file:

[root@p8le03 home]# du -h test_file_harsha
108G test_file_harsha

[root@p8le03 home]# genwqe_gzip test_file_harsha

[root@p8le03 home]# genwqe_gzip test_file_harsha.gz -l
compressed uncompressed ratio uncompressed_name
2583984192 -620756992 29.67% test_file_harsha

[root@p8le03 home]# du -h test_file_harsha.gz
2.5G test_file_harsha.gz

[hathyaga]

@fhaverkamp Issue for genwqe_gzip test for a negative value observed during compression test raised as requested.

[fhaverkamp]

@hathyaga What was the resulting output of software gzip?
I wonder since the output size is stored at the end of the data. The field in rfc1952 is called ISIZE:

     ISIZE (Input SIZE)
        This contains the size of the original (uncompressed) input
        data modulo 2^32.

So I wonder if they print that or if they try to decompress, and discard the output to get the real value.

The spot in the code is this:

    if (!verbose) {
            fprintf(stderr,
                    "         compressed        uncompressed  ratio "
                    "uncompressed_name\n"
                    "%19lld %19d  %2.2f%% %s\n",
                    (long long)st.st_size, size, ratio,
                    out_f);
    } else {
            time_t t = time(NULL);
            struct tm *tm = localtime(&t);
            /* (const time_t *)&head.time */

            fprintf(stderr, "method  crc     date  time           "
                    "compressed        uncompressed  ratio "
                    "uncompressed_name\n"
                    "%s %x %s %2d %d:%d %19lld %19d  %2.2f%% %s\n",
                    "defla", crc32,
                    mon[tm->tm_mon], tm->tm_mday, tm->tm_hour, tm->tm_min,
                    (long long)st.st_size, size, ratio,
                    out_f);
    }

I guess some %d should better be %u or alike. We need to try.

[fhaverkamp]

Here my current results:

haver@tul3eth3:/genwqe-user.new$ ./tools/genwqe_gzip -ACAPI -B0 -l 3GiB.bin.gz
compressed uncompressed ratio uncompressed_name
3223176858 3221225472 -0.06% 3GiB.bin
haver@tul3eth3:/genwqe-user.new$ gzip -l 3GiB.bin.gz
compressed uncompressed ratio uncompressed_name
3223176858 3221225472 -0.1% 3GiB.bin

Please have a look if that is working for you:
371a0d3

I pushed this to the master branch.