== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:07:11 (1763341631)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0576 s, 7.5 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-ffff94b69817d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.48087
Iter 1/10: OSS cache speed: 0.566125
Iter 1/10: ladvise speed: 0.559909
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.505105
Iter 2/10: OSS cache speed: 0.581882
Iter 2/10: ladvise speed: 0.585531
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.54211
Iter 3/10: OSS cache speed: 0.578755
Iter 3/10: ladvise speed: 0.573198
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.477806
Iter 4/10: OSS cache speed: 0.584193
Iter 4/10: ladvise speed: 0.563756
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.515308
Iter 5/10: OSS cache speed: 0.585847
Iter 5/10: ladvise speed: 0.578824
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.511428
Iter 6/10: OSS cache speed: 0.552714
Iter 6/10: ladvise speed: 0.534962
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.466041
Iter 7/10: OSS cache speed: 0.555501
Iter 7/10: ladvise speed: 0.607971
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.513317
Iter 8/10: OSS cache speed: 0.570647
Iter 8/10: ladvise speed: 0.599312
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.503686
Iter 9/10: OSS cache speed: 0.599997
Iter 9/10: ladvise speed: 0.578746
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.525108
Iter 10/10: OSS cache speed: 0.581901
Iter 10/10: ladvise speed: 0.556271
Average uncached read: .50
Average speedup with OSS cached read:  .57 = +14%
Average speedup with ladvise willread:  .57 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0