== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:22:25 (1775874145)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.96868 s, 10.5 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-ffff992a88b53800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.440006
Iter 1/10: OSS cache speed: 0.437483
Iter 1/10: ladvise speed: 0.450307
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.445094
Iter 2/10: OSS cache speed: 0.410023
Iter 2/10: ladvise speed: 0.433481
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.426116
Iter 3/10: OSS cache speed: 0.410875
Iter 3/10: ladvise speed: 0.43289
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.449664
Iter 4/10: OSS cache speed: 0.456943
Iter 4/10: ladvise speed: 0.46348
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.493717
Iter 5/10: OSS cache speed: 0.497255
Iter 5/10: ladvise speed: 0.502076
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.527069
Iter 6/10: OSS cache speed: 0.518352
Iter 6/10: ladvise speed: 0.508769
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.485087
Iter 7/10: OSS cache speed: 0.549749
Iter 7/10: ladvise speed: 0.558329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.559277
Iter 8/10: OSS cache speed: 0.532864
Iter 8/10: ladvise speed: 0.527205
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.543531
Iter 9/10: OSS cache speed: 0.517431
Iter 9/10: ladvise speed: 0.519119
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.572181
Iter 10/10: OSS cache speed: 0.614158
Iter 10/10: ladvise speed: 0.646983
Average uncached read: .49
Average speedup with OSS cached read:  .49 = +0%
Average speedup with ladvise willread:  .50 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0