== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:37:56 (1786408676)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.2052 s, 5.8 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-ffff8e0003367800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.447699
Iter 1/10: OSS cache speed: 0.549301
Iter 1/10: ladvise speed: 0.482193
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.498152
Iter 2/10: OSS cache speed: 0.526657
Iter 2/10: ladvise speed: 0.513365
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.489369
Iter 3/10: OSS cache speed: 0.539114
Iter 3/10: ladvise speed: 0.575647
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.521999
Iter 4/10: OSS cache speed: 0.57377
Iter 4/10: ladvise speed: 0.540597
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.509153
Iter 5/10: OSS cache speed: 0.503018
Iter 5/10: ladvise speed: 0.57956
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.532864
Iter 6/10: OSS cache speed: 0.55163
Iter 6/10: ladvise speed: 0.566317
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.55487
Iter 7/10: OSS cache speed: 0.546663
Iter 7/10: ladvise speed: 0.588833
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.532034
Iter 8/10: OSS cache speed: 0.603274
Iter 8/10: ladvise speed: 0.565509
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.439754
Iter 9/10: OSS cache speed: 0.494226
Iter 9/10: ladvise speed: 0.547044
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.503924
Iter 10/10: OSS cache speed: 0.513493
Iter 10/10: ladvise speed: 0.524592
Average uncached read: .50
Average speedup with OSS cached read:  .54 = +8%
Average speedup with ladvise willread:  .54 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0