== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:19:03 (1767323943)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.63735 s, 13.7 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-ffff9df75225c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.597571
Iter 1/10: OSS cache speed: 0.612531
Iter 1/10: ladvise speed: 0.616587
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.635122
Iter 2/10: OSS cache speed: 0.607006
Iter 2/10: ladvise speed: 0.653311
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.771518
Iter 3/10: OSS cache speed: 0.819163
Iter 3/10: ladvise speed: 0.865309
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.970095
Iter 4/10: OSS cache speed: 0.90151
Iter 4/10: ladvise speed: 1.02718
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.82311
Iter 5/10: OSS cache speed: 0.867069
Iter 5/10: ladvise speed: 0.777309
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.905669
Iter 6/10: OSS cache speed: 1.24599
Iter 6/10: ladvise speed: 1.16125
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.988453
Iter 7/10: OSS cache speed: 1.35396
Iter 7/10: ladvise speed: 1.12176
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.992019
Iter 8/10: OSS cache speed: 1.147
Iter 8/10: ladvise speed: 1.19969
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.30545
Iter 9/10: OSS cache speed: 1.1875
Iter 9/10: ladvise speed: 1.24493
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.32134
Iter 10/10: OSS cache speed: 1.43384
Iter 10/10: ladvise speed: 1.51828
Average uncached read: .93
Average speedup with OSS cached read:  1.01 = +8%
Average speedup with ladvise willread:  1.01 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0