== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:02:49 (1788451369)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9909 s, 8.1 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-ffff92a108d10800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368731
Iter 1/10: OSS cache speed: 0.396985
Iter 1/10: ladvise speed: 0.422222
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.408692
Iter 2/10: OSS cache speed: 0.497446
Iter 2/10: ladvise speed: 0.460394
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.399939
Iter 3/10: OSS cache speed: 0.445516
Iter 3/10: ladvise speed: 0.460422
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.508249
Iter 4/10: OSS cache speed: 0.418949
Iter 4/10: ladvise speed: 0.505207
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.475635
Iter 5/10: OSS cache speed: 0.537302
Iter 5/10: ladvise speed: 0.472742
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.524004
Iter 6/10: OSS cache speed: 0.468594
Iter 6/10: ladvise speed: 0.356375
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.452348
Iter 7/10: OSS cache speed: 0.47235
Iter 7/10: ladvise speed: 0.550314
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.406842
Iter 8/10: OSS cache speed: 0.455705
Iter 8/10: ladvise speed: 0.314072
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.538007
Iter 9/10: OSS cache speed: 0.499304
Iter 9/10: ladvise speed: 0.330572
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.442227
Iter 10/10: OSS cache speed: 0.429499
Iter 10/10: ladvise speed: 0.537812
Average uncached read: .45
Average speedup with OSS cached read:  .46 = +2%
Average speedup with ladvise willread:  .44 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0