== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:45:30 (1775868330)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.3745 s, 6.8 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-ffff88acd02fe800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.349453
Iter 1/10: OSS cache speed: 0.343556
Iter 1/10: ladvise speed: 0.316639
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310178
Iter 2/10: OSS cache speed: 0.338671
Iter 2/10: ladvise speed: 0.39272
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.42157
Iter 3/10: OSS cache speed: 0.344866
Iter 3/10: ladvise speed: 0.419083
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.311256
Iter 4/10: OSS cache speed: 0.334761
Iter 4/10: ladvise speed: 0.505216
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.513551
Iter 5/10: OSS cache speed: 0.583755
Iter 5/10: ladvise speed: 0.611383
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.546917
Iter 6/10: OSS cache speed: 0.589833
Iter 6/10: ladvise speed: 0.529654
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.243124
Iter 7/10: OSS cache speed: 0.366788
Iter 7/10: ladvise speed: 0.361763
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.368978
Iter 8/10: OSS cache speed: 0.370759
Iter 8/10: ladvise speed: 0.34103
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.398719
Iter 9/10: OSS cache speed: 0.402251
Iter 9/10: ladvise speed: 0.417025
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.410161
Iter 10/10: OSS cache speed: 0.401933
Iter 10/10: ladvise speed: 0.395301
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0