== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:49:00 (1787784540)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9527 s, 7.5 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-ffff8c5e0868d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.430065
Iter 1/10: OSS cache speed: 0.344857
Iter 1/10: ladvise speed: 0.409136
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310345
Iter 2/10: OSS cache speed: 0.378091
Iter 2/10: ladvise speed: 0.358446
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339051
Iter 3/10: OSS cache speed: 0.358324
Iter 3/10: ladvise speed: 0.396579
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.357256
Iter 4/10: OSS cache speed: 0.394915
Iter 4/10: ladvise speed: 0.382731
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.321766
Iter 5/10: OSS cache speed: 0.378895
Iter 5/10: ladvise speed: 0.369126
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.320165
Iter 6/10: OSS cache speed: 0.334562
Iter 6/10: ladvise speed: 0.3782
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.316013
Iter 7/10: OSS cache speed: 0.393057
Iter 7/10: ladvise speed: 0.386064
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.383429
Iter 8/10: OSS cache speed: 0.38457
Iter 8/10: ladvise speed: 0.374867
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.380061
Iter 9/10: OSS cache speed: 0.333976
Iter 9/10: ladvise speed: 0.379836
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363639
Iter 10/10: OSS cache speed: 0.396682
Iter 10/10: ladvise speed: 0.344132
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0