== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:41:29 (1773222089)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.1991 s, 5.8 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-ffff9f3650a59800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.22593
Iter 1/10: OSS cache speed: 0.241176
Iter 1/10: ladvise speed: 0.281399
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.228437
Iter 2/10: OSS cache speed: 0.246322
Iter 2/10: ladvise speed: 0.242217
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.181105
Iter 3/10: OSS cache speed: 0.22518
Iter 3/10: ladvise speed: 0.237122
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.225704
Iter 4/10: OSS cache speed: 0.29413
Iter 4/10: ladvise speed: 0.271305
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.294605
Iter 5/10: OSS cache speed: 0.31511
Iter 5/10: ladvise speed: 0.329443
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33594
Iter 6/10: OSS cache speed: 0.351755
Iter 6/10: ladvise speed: 0.387615
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.374744
Iter 7/10: OSS cache speed: 0.38062
Iter 7/10: ladvise speed: 0.382416
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.381907
Iter 8/10: OSS cache speed: 0.391931
Iter 8/10: ladvise speed: 0.390543
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.386119
Iter 9/10: OSS cache speed: 0.378619
Iter 9/10: ladvise speed: 0.404879
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.396567
Iter 10/10: OSS cache speed: 0.395738
Iter 10/10: ladvise speed: 0.383492
Average uncached read: .30
Average speedup with OSS cached read:  .32 = +6%
Average speedup with ladvise willread:  .33 = +10%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0