== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:38:32 (1787863112)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.1278 s, 6.9 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-ffff890c48426800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.370468
Iter 1/10: OSS cache speed: 0.368679
Iter 1/10: ladvise speed: 0.35934
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.464162
Iter 2/10: OSS cache speed: 0.502809
Iter 2/10: ladvise speed: 0.41464
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.498052
Iter 3/10: OSS cache speed: 0.531093
Iter 3/10: ladvise speed: 0.356537
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368286
Iter 4/10: OSS cache speed: 0.401678
Iter 4/10: ladvise speed: 0.526554
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.470297
Iter 5/10: OSS cache speed: 0.437351
Iter 5/10: ladvise speed: 0.379559
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.441007
Iter 6/10: OSS cache speed: 0.37792
Iter 6/10: ladvise speed: 0.376448
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415211
Iter 7/10: OSS cache speed: 0.380299
Iter 7/10: ladvise speed: 0.428629
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.415487
Iter 8/10: OSS cache speed: 0.415187
Iter 8/10: ladvise speed: 0.504056
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.488237
Iter 9/10: OSS cache speed: 0.447124
Iter 9/10: ladvise speed: 0.534164
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.525736
Iter 10/10: OSS cache speed: 0.515394
Iter 10/10: ladvise speed: 0.527475
Average uncached read: .44
Average speedup with OSS cached read:  .43 = +-2%
Average speedup with ladvise willread:  .44 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0