== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:49:07 (1790660947)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.9247 s, 8.8 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-ffff8a2107f6d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.359808
Iter 1/10: OSS cache speed: 0.362375
Iter 1/10: ladvise speed: 0.364281
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.33255
Iter 2/10: OSS cache speed: 0.380568
Iter 2/10: ladvise speed: 0.35988
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.380255
Iter 3/10: OSS cache speed: 0.373045
Iter 3/10: ladvise speed: 0.401945
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.406302
Iter 4/10: OSS cache speed: 0.364892
Iter 4/10: ladvise speed: 0.344934
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.374859
Iter 5/10: OSS cache speed: 0.360536
Iter 5/10: ladvise speed: 0.34611
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.373034
Iter 6/10: OSS cache speed: 0.406989
Iter 6/10: ladvise speed: 0.382209
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.377931
Iter 7/10: OSS cache speed: 0.366478
Iter 7/10: ladvise speed: 0.357886
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.35949
Iter 8/10: OSS cache speed: 0.36979
Iter 8/10: ladvise speed: 0.345061
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.383143
Iter 9/10: OSS cache speed: 0.301195
Iter 9/10: ladvise speed: 0.364946
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363462
Iter 10/10: OSS cache speed: 0.360211
Iter 10/10: ladvise speed: 0.353014
Average uncached read: .37
Average speedup with OSS cached read:  .36 = +-2%
Average speedup with ladvise willread:  .36 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0