== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:30:01 (1787369401)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2537 s, 8.6 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-ffff99a3c2a2e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.420872
Iter 1/10: OSS cache speed: 0.496533
Iter 1/10: ladvise speed: 0.42095
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.437123
Iter 2/10: OSS cache speed: 0.494104
Iter 2/10: ladvise speed: 0.454506
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.443799
Iter 3/10: OSS cache speed: 0.49387
Iter 3/10: ladvise speed: 0.403546
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.35741
Iter 4/10: OSS cache speed: 0.490363
Iter 4/10: ladvise speed: 0.476547
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.411136
Iter 5/10: OSS cache speed: 0.465802
Iter 5/10: ladvise speed: 0.429548
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.423702
Iter 6/10: OSS cache speed: 0.463595
Iter 6/10: ladvise speed: 0.486115
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415424
Iter 7/10: OSS cache speed: 0.474561
Iter 7/10: ladvise speed: 0.489008
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389425
Iter 8/10: OSS cache speed: 0.439298
Iter 8/10: ladvise speed: 0.482568
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.459452
Iter 9/10: OSS cache speed: 0.397836
Iter 9/10: ladvise speed: 0.458073
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.38262
Iter 10/10: OSS cache speed: 0.508784
Iter 10/10: ladvise speed: 0.437952
Average uncached read: .41
Average speedup with OSS cached read:  .47 = +14%
Average speedup with ladvise willread:  .45 = +9%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0