== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:30:16 (1773199816)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6835 s, 9.0 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-ffff8b69c9009000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385169
Iter 1/10: OSS cache speed: 0.425511
Iter 1/10: ladvise speed: 0.402882
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.412317
Iter 2/10: OSS cache speed: 0.397053
Iter 2/10: ladvise speed: 0.435133
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.452932
Iter 3/10: OSS cache speed: 0.387005
Iter 3/10: ladvise speed: 0.394879
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.416773
Iter 4/10: OSS cache speed: 0.37548
Iter 4/10: ladvise speed: 0.356666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.413
Iter 5/10: OSS cache speed: 0.378857
Iter 5/10: ladvise speed: 0.434779
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.371356
Iter 6/10: OSS cache speed: 0.337421
Iter 6/10: ladvise speed: 0.353725
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.397755
Iter 7/10: OSS cache speed: 0.407462
Iter 7/10: ladvise speed: 0.410075
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.410666
Iter 8/10: OSS cache speed: 0.364197
Iter 8/10: ladvise speed: 0.35222
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.386266
Iter 9/10: OSS cache speed: 0.403991
Iter 9/10: ladvise speed: 0.370817
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.384948
Iter 10/10: OSS cache speed: 0.32982
Iter 10/10: ladvise speed: 0.277633
Average uncached read: .40
Average speedup with OSS cached read:  .38 = +-5%
Average speedup with ladvise willread:  .37 = +-7%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0