== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:13:43 (1788815623)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.32318 s, 11.2 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-ffff98f88545a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.666053
Iter 1/10: OSS cache speed: 0.763807
Iter 1/10: ladvise speed: 0.749204
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.657027
Iter 2/10: OSS cache speed: 0.582869
Iter 2/10: ladvise speed: 0.438517
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.46123
Iter 3/10: OSS cache speed: 0.595784
Iter 3/10: ladvise speed: 0.521486
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.59849
Iter 4/10: OSS cache speed: 0.612926
Iter 4/10: ladvise speed: 0.633204
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.589727
Iter 5/10: OSS cache speed: 0.65355
Iter 5/10: ladvise speed: 0.727
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.618642
Iter 6/10: OSS cache speed: 0.715054
Iter 6/10: ladvise speed: 0.703417
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.624674
Iter 7/10: OSS cache speed: 0.732852
Iter 7/10: ladvise speed: 0.75966
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.643052
Iter 8/10: OSS cache speed: 0.741238
Iter 8/10: ladvise speed: 0.776644
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333413
Iter 9/10: OSS cache speed: 0.421438
Iter 9/10: ladvise speed: 0.475816
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.444095
Iter 10/10: OSS cache speed: 0.444869
Iter 10/10: ladvise speed: 0.449096
Average uncached read: .56
Average speedup with OSS cached read:  .62 = +10%
Average speedup with ladvise willread:  .62 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0