== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:43:29 (1789299809)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7693 s, 8.9 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-ffff92c0c3ec8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.387412
Iter 1/10: OSS cache speed: 0.502378
Iter 1/10: ladvise speed: 0.484679
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.456409
Iter 2/10: OSS cache speed: 0.486732
Iter 2/10: ladvise speed: 0.559478
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.476589
Iter 3/10: OSS cache speed: 0.473991
Iter 3/10: ladvise speed: 0.450008
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.449969
Iter 4/10: OSS cache speed: 0.558978
Iter 4/10: ladvise speed: 0.431584
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.482984
Iter 5/10: OSS cache speed: 0.467572
Iter 5/10: ladvise speed: 0.432916
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.400007
Iter 6/10: OSS cache speed: 0.521244
Iter 6/10: ladvise speed: 0.461893
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.399884
Iter 7/10: OSS cache speed: 0.492723
Iter 7/10: ladvise speed: 0.462555
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.417374
Iter 8/10: OSS cache speed: 0.416388
Iter 8/10: ladvise speed: 0.411113
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.42504
Iter 9/10: OSS cache speed: 0.481995
Iter 9/10: ladvise speed: 0.436045
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337941
Iter 10/10: OSS cache speed: 0.339702
Iter 10/10: ladvise speed: 0.477661
Average uncached read: .42
Average speedup with OSS cached read:  .47 = +11%
Average speedup with ladvise willread:  .46 = +9%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0