== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:09:45 (1781240985)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5394 s, 7.7 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-ffff91cf84cba800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.30033
Iter 1/10: OSS cache speed: 0.351564
Iter 1/10: ladvise speed: 0.322009
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.270794
Iter 2/10: OSS cache speed: 0.312902
Iter 2/10: ladvise speed: 0.291224
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301378
Iter 3/10: OSS cache speed: 0.306235
Iter 3/10: ladvise speed: 0.315522
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.288618
Iter 4/10: OSS cache speed: 0.310993
Iter 4/10: ladvise speed: 0.267266
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.247451
Iter 5/10: OSS cache speed: 0.287116
Iter 5/10: ladvise speed: 0.323671
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.280094
Iter 6/10: OSS cache speed: 0.312907
Iter 6/10: ladvise speed: 0.295523
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.24908
Iter 7/10: OSS cache speed: 0.310634
Iter 7/10: ladvise speed: 0.311733
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.274204
Iter 8/10: OSS cache speed: 0.275904
Iter 8/10: ladvise speed: 0.298855
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.319839
Iter 9/10: OSS cache speed: 0.326367
Iter 9/10: ladvise speed: 0.34956
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349256
Iter 10/10: OSS cache speed: 0.405978
Iter 10/10: ladvise speed: 0.431181
Average uncached read: .28
Average speedup with OSS cached read:  .32 = +14%
Average speedup with ladvise willread:  .32 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0