== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:17:52 (1789586272)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2955 s, 10.2 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-ffff8d18c9275000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.391001
Iter 1/10: OSS cache speed: 0.387565
Iter 1/10: ladvise speed: 0.455027
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.447548
Iter 2/10: OSS cache speed: 0.422603
Iter 2/10: ladvise speed: 0.393203
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.39337
Iter 3/10: OSS cache speed: 0.382521
Iter 3/10: ladvise speed: 0.3957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.381542
Iter 4/10: OSS cache speed: 0.391852
Iter 4/10: ladvise speed: 0.360738
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.38572
Iter 5/10: OSS cache speed: 0.395105
Iter 5/10: ladvise speed: 0.372606
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.406629
Iter 6/10: OSS cache speed: 0.385482
Iter 6/10: ladvise speed: 0.387283
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415216
Iter 7/10: OSS cache speed: 0.320226
Iter 7/10: ladvise speed: 0.417247
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.345188
Iter 8/10: OSS cache speed: 0.361819
Iter 8/10: ladvise speed: 0.385752
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.305166
Iter 9/10: OSS cache speed: 0.345816
Iter 9/10: ladvise speed: 0.310673
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.365771
Iter 10/10: OSS cache speed: 0.367446
Iter 10/10: ladvise speed: 0.341273
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