== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:17:55 (1790943475)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.506 s, 6.4 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-ffff9b7949234000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.3468
Iter 1/10: OSS cache speed: 0.29064
Iter 1/10: ladvise speed: 0.293924
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.35172
Iter 2/10: OSS cache speed: 0.335464
Iter 2/10: ladvise speed: 0.315015
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.288469
Iter 3/10: OSS cache speed: 0.293087
Iter 3/10: ladvise speed: 0.357824
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.331573
Iter 4/10: OSS cache speed: 0.315141
Iter 4/10: ladvise speed: 0.337943
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334828
Iter 5/10: OSS cache speed: 0.297057
Iter 5/10: ladvise speed: 0.323396
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329831
Iter 6/10: OSS cache speed: 0.305398
Iter 6/10: ladvise speed: 0.391319
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.321724
Iter 7/10: OSS cache speed: 0.357565
Iter 7/10: ladvise speed: 0.369262
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.39792
Iter 8/10: OSS cache speed: 0.359606
Iter 8/10: ladvise speed: 0.376649
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.363419
Iter 9/10: OSS cache speed: 0.374128
Iter 9/10: ladvise speed: 0.330546
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.396472
Iter 10/10: OSS cache speed: 0.400524
Iter 10/10: ladvise speed: 0.314355
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0