== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:12:23 (1788563543)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.144 s, 6.9 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-ffff945811714000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.294018
Iter 1/10: OSS cache speed: 0.281535
Iter 1/10: ladvise speed: 0.346258
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.323542
Iter 2/10: OSS cache speed: 0.404833
Iter 2/10: ladvise speed: 0.457152
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.423141
Iter 3/10: OSS cache speed: 0.431504
Iter 3/10: ladvise speed: 0.388289
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396506
Iter 4/10: OSS cache speed: 0.332578
Iter 4/10: ladvise speed: 0.290764
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.363199
Iter 5/10: OSS cache speed: 0.363245
Iter 5/10: ladvise speed: 0.386971
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372409
Iter 6/10: OSS cache speed: 0.471709
Iter 6/10: ladvise speed: 0.492268
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.431002
Iter 7/10: OSS cache speed: 0.457073
Iter 7/10: ladvise speed: 0.432868
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.283845
Iter 8/10: OSS cache speed: 0.446211
Iter 8/10: ladvise speed: 0.330973
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.233
Iter 9/10: OSS cache speed: 0.31741
Iter 9/10: ladvise speed: 0.37621
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.324318
Iter 10/10: OSS cache speed: 0.353886
Iter 10/10: ladvise speed: 0.401054
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .39 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0