== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:34:07 (1788528847)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0877 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-ffff8e8304cf9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.462415
Iter 1/10: OSS cache speed: 0.546873
Iter 1/10: ladvise speed: 0.551672
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.50202
Iter 2/10: OSS cache speed: 0.493433
Iter 2/10: ladvise speed: 0.53238
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.389201
Iter 3/10: OSS cache speed: 0.54074
Iter 3/10: ladvise speed: 0.482922
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.512985
Iter 4/10: OSS cache speed: 0.463097
Iter 4/10: ladvise speed: 0.461853
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319024
Iter 5/10: OSS cache speed: 0.458914
Iter 5/10: ladvise speed: 0.435067
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.363283
Iter 6/10: OSS cache speed: 0.54191
Iter 6/10: ladvise speed: 0.388847
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.378029
Iter 7/10: OSS cache speed: 0.421102
Iter 7/10: ladvise speed: 0.549733
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.444353
Iter 8/10: OSS cache speed: 0.47423
Iter 8/10: ladvise speed: 0.516468
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.469928
Iter 9/10: OSS cache speed: 0.515519
Iter 9/10: ladvise speed: 0.516275
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.453232
Iter 10/10: OSS cache speed: 0.446468
Iter 10/10: ladvise speed: 0.517333
Average uncached read: .42
Average speedup with OSS cached read:  .49 = +16%
Average speedup with ladvise willread:  .49 = +16%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0