== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:29:24 (1789352964)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1887 s, 9.4 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff90fa50e5a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.471854
Iter 1/10: OSS cache speed: 0.490232
Iter 1/10: ladvise speed: 0.448203
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.526975
Iter 2/10: OSS cache speed: 0.623311
Iter 2/10: ladvise speed: 0.69628
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.600402
Iter 3/10: OSS cache speed: 0.839001
Iter 3/10: ladvise speed: 0.949136
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.924428
Iter 4/10: OSS cache speed: 1.09759
Iter 4/10: ladvise speed: 1.67747
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.89427
Iter 5/10: OSS cache speed: 1.63979
Iter 5/10: ladvise speed: 1.95518
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.32968
Iter 6/10: OSS cache speed: 1.25636
Iter 6/10: ladvise speed: 1.61947
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.50718
Iter 7/10: OSS cache speed: 1.81489
Iter 7/10: ladvise speed: 1.85842
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.91707
Iter 8/10: OSS cache speed: 1.77406
Iter 8/10: ladvise speed: 2.2562
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.21952
Iter 9/10: OSS cache speed: 2.23714
Iter 9/10: ladvise speed: 2.12996
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.31949
Iter 10/10: OSS cache speed: 2.48544
Iter 10/10: ladvise speed: 2.37928
Average uncached read: 1.37
Average speedup with OSS cached read:  1.42 = +3%
Average speedup with ladvise willread:  1.59 = +16%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0