== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:05:29 (1748469929)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.39384 s, 43.8 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-ffff8800b62cb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.58538
Iter 1/10: OSS cache speed: 1.92234
Iter 1/10: ladvise speed: 1.81357
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.75365
Iter 2/10: OSS cache speed: 2.20408
Iter 2/10: ladvise speed: 1.94017
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.39219
Iter 3/10: OSS cache speed: 1.67193
Iter 3/10: ladvise speed: 1.73554
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.48847
Iter 4/10: OSS cache speed: 1.67875
Iter 4/10: ladvise speed: 2.347
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.916919
Iter 5/10: OSS cache speed: 0.874973
Iter 5/10: ladvise speed: 1.8274
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.77518
Iter 6/10: OSS cache speed: 2.89866
Iter 6/10: ladvise speed: 3.12571
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.07428
Iter 7/10: OSS cache speed: 3.2302
Iter 7/10: ladvise speed: 3.31594
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.73076
Iter 8/10: OSS cache speed: 2.83117
Iter 8/10: ladvise speed: 3.09959
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.88758
Iter 9/10: OSS cache speed: 3.15535
Iter 9/10: ladvise speed: 3.20152
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.84857
Iter 10/10: OSS cache speed: 3.26849
Iter 10/10: ladvise speed: 3.17985
Average uncached read: 2.14
Average speedup with OSS cached read:  2.37 = +10%
Average speedup with ladvise willread:  2.55 = +19%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0