== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:09:32 (1784938172)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6684 s, 8.3 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-ffff8f2d45d0c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.375013
Iter 1/10: OSS cache speed: 0.403945
Iter 1/10: ladvise speed: 0.441792
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384247
Iter 2/10: OSS cache speed: 0.402431
Iter 2/10: ladvise speed: 0.390011
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.312784
Iter 3/10: OSS cache speed: 0.400796
Iter 3/10: ladvise speed: 0.415442
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.411061
Iter 4/10: OSS cache speed: 0.439618
Iter 4/10: ladvise speed: 0.448595
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409272
Iter 5/10: OSS cache speed: 0.435783
Iter 5/10: ladvise speed: 0.431246
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403503
Iter 6/10: OSS cache speed: 0.431851
Iter 6/10: ladvise speed: 0.399147
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400507
Iter 7/10: OSS cache speed: 0.432141
Iter 7/10: ladvise speed: 0.422059
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382475
Iter 8/10: OSS cache speed: 0.420608
Iter 8/10: ladvise speed: 0.422781
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.409794
Iter 9/10: OSS cache speed: 0.432364
Iter 9/10: ladvise speed: 0.394895
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.421604
Iter 10/10: OSS cache speed: 0.396449
Iter 10/10: ladvise speed: 0.478192
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .42 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0