== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:29:36 (1780334976)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1245 s, 7.4 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-ffff924791bd5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.291266
Iter 1/10: OSS cache speed: 0.336042
Iter 1/10: ladvise speed: 0.318095
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332253
Iter 2/10: OSS cache speed: 0.383602
Iter 2/10: ladvise speed: 0.326202
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.421226
Iter 3/10: OSS cache speed: 0.381082
Iter 3/10: ladvise speed: 0.487305
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338187
Iter 4/10: OSS cache speed: 0.368287
Iter 4/10: ladvise speed: 0.414164
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.418965
Iter 5/10: OSS cache speed: 0.449259
Iter 5/10: ladvise speed: 0.368823
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.35165
Iter 6/10: OSS cache speed: 0.434649
Iter 6/10: ladvise speed: 0.367961
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.387551
Iter 7/10: OSS cache speed: 0.351503
Iter 7/10: ladvise speed: 0.363661
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.364338
Iter 8/10: OSS cache speed: 0.402407
Iter 8/10: ladvise speed: 0.398324
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.350694
Iter 9/10: OSS cache speed: 0.34507
Iter 9/10: ladvise speed: 0.368508
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.393449
Iter 10/10: OSS cache speed: 0.383472
Iter 10/10: ladvise speed: 0.344718
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0