== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:31:18 (1787844678)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5626 s, 7.7 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-ffff946084ba7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.383307
Iter 1/10: OSS cache speed: 0.387419
Iter 1/10: ladvise speed: 0.381541
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.33746
Iter 2/10: OSS cache speed: 0.31513
Iter 2/10: ladvise speed: 0.303032
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.324573
Iter 3/10: OSS cache speed: 0.342581
Iter 3/10: ladvise speed: 0.379012
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384031
Iter 4/10: OSS cache speed: 0.348586
Iter 4/10: ladvise speed: 0.364045
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.310736
Iter 5/10: OSS cache speed: 0.317281
Iter 5/10: ladvise speed: 0.312242
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.289272
Iter 6/10: OSS cache speed: 0.312743
Iter 6/10: ladvise speed: 0.323077
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.30187
Iter 7/10: OSS cache speed: 0.337945
Iter 7/10: ladvise speed: 0.348101
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.324316
Iter 8/10: OSS cache speed: 0.316779
Iter 8/10: ladvise speed: 0.303553
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.369644
Iter 9/10: OSS cache speed: 0.38584
Iter 9/10: ladvise speed: 0.356736
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.394539
Iter 10/10: OSS cache speed: 0.32945
Iter 10/10: ladvise speed: 0.310389
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0