== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:51:18 (1786963878)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1151 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-ffff939dc2f0b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.465116
Iter 1/10: OSS cache speed: 0.548113
Iter 1/10: ladvise speed: 0.452968
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.423738
Iter 2/10: OSS cache speed: 0.423691
Iter 2/10: ladvise speed: 0.369045
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.445884
Iter 3/10: OSS cache speed: 0.366331
Iter 3/10: ladvise speed: 0.379947
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356206
Iter 4/10: OSS cache speed: 0.393952
Iter 4/10: ladvise speed: 0.433141
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.378873
Iter 5/10: OSS cache speed: 0.442432
Iter 5/10: ladvise speed: 0.404326
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403592
Iter 6/10: OSS cache speed: 0.3944
Iter 6/10: ladvise speed: 0.465411
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.333557
Iter 7/10: OSS cache speed: 0.422757
Iter 7/10: ladvise speed: 0.382169
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.400426
Iter 8/10: OSS cache speed: 0.433067
Iter 8/10: ladvise speed: 0.377678
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.444424
Iter 9/10: OSS cache speed: 0.482787
Iter 9/10: ladvise speed: 0.453985
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.426512
Iter 10/10: OSS cache speed: 0.417248
Iter 10/10: ladvise speed: 0.430493
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .41 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0