== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:53:04 (1790949184)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.464 s, 7.8 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-ffff99a4cafe6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.320215
Iter 1/10: OSS cache speed: 0.387489
Iter 1/10: ladvise speed: 0.296408
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.357793
Iter 2/10: OSS cache speed: 0.36282
Iter 2/10: ladvise speed: 0.35314
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.359937
Iter 3/10: OSS cache speed: 0.395823
Iter 3/10: ladvise speed: 0.376805
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.362376
Iter 4/10: OSS cache speed: 0.347674
Iter 4/10: ladvise speed: 0.398373
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341896
Iter 5/10: OSS cache speed: 0.365395
Iter 5/10: ladvise speed: 0.38056
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.301346
Iter 6/10: OSS cache speed: 0.319008
Iter 6/10: ladvise speed: 0.390164
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375597
Iter 7/10: OSS cache speed: 0.368651
Iter 7/10: ladvise speed: 0.368322
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.334269
Iter 8/10: OSS cache speed: 0.30814
Iter 8/10: ladvise speed: 0.351008
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312998
Iter 9/10: OSS cache speed: 0.373844
Iter 9/10: ladvise speed: 0.411021
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.373723
Iter 10/10: OSS cache speed: 0.409613
Iter 10/10: ladvise speed: 0.289004
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .36 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0