== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:21:17 (1785777677)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0858 s, 10.4 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-ffff95abd804c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364548
Iter 1/10: OSS cache speed: 0.335681
Iter 1/10: ladvise speed: 0.379443
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392773
Iter 2/10: OSS cache speed: 0.360977
Iter 2/10: ladvise speed: 0.36761
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.376033
Iter 3/10: OSS cache speed: 0.294758
Iter 3/10: ladvise speed: 0.404538
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.416429
Iter 4/10: OSS cache speed: 0.360296
Iter 4/10: ladvise speed: 0.391225
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.388658
Iter 5/10: OSS cache speed: 0.406579
Iter 5/10: ladvise speed: 0.421619
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.406839
Iter 6/10: OSS cache speed: 0.392643
Iter 6/10: ladvise speed: 0.398873
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.392498
Iter 7/10: OSS cache speed: 0.389314
Iter 7/10: ladvise speed: 0.364605
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.403679
Iter 8/10: OSS cache speed: 0.365896
Iter 8/10: ladvise speed: 0.36457
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.359311
Iter 9/10: OSS cache speed: 0.410999
Iter 9/10: ladvise speed: 0.369577
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.389219
Iter 10/10: OSS cache speed: 0.422195
Iter 10/10: ladvise speed: 0.390848
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0