== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:32:23 (1790713943)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8147 s, 7.6 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-ffff9aa590ff4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379064
Iter 1/10: OSS cache speed: 0.425592
Iter 1/10: ladvise speed: 0.343181
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.413497
Iter 2/10: OSS cache speed: 0.40131
Iter 2/10: ladvise speed: 0.43606
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.426758
Iter 3/10: OSS cache speed: 0.438817
Iter 3/10: ladvise speed: 0.414941
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.456061
Iter 4/10: OSS cache speed: 0.411593
Iter 4/10: ladvise speed: 0.459387
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.405883
Iter 5/10: OSS cache speed: 0.48294
Iter 5/10: ladvise speed: 0.44874
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.497277
Iter 6/10: OSS cache speed: 0.4403
Iter 6/10: ladvise speed: 0.451537
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.487819
Iter 7/10: OSS cache speed: 0.405933
Iter 7/10: ladvise speed: 0.489963
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.363244
Iter 8/10: OSS cache speed: 0.430397
Iter 8/10: ladvise speed: 0.458305
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.497877
Iter 9/10: OSS cache speed: 0.415685
Iter 9/10: ladvise speed: 0.469746
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.428192
Iter 10/10: OSS cache speed: 0.42409
Iter 10/10: ladvise speed: 0.46092
Average uncached read: .43
Average speedup with OSS cached read:  .42 = +-2%
Average speedup with ladvise willread:  .44 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0