== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:08:51 (1786007331)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.0819 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-ffff985e4714a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.265574
Iter 1/10: OSS cache speed: 0.229842
Iter 1/10: ladvise speed: 0.258675
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.229394
Iter 2/10: OSS cache speed: 0.237787
Iter 2/10: ladvise speed: 0.259502
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.234282
Iter 3/10: OSS cache speed: 0.202588
Iter 3/10: ladvise speed: 0.258553
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.23719
Iter 4/10: OSS cache speed: 0.216196
Iter 4/10: ladvise speed: 0.228649
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.265579
Iter 5/10: OSS cache speed: 0.230361
Iter 5/10: ladvise speed: 0.274806
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.237612
Iter 6/10: OSS cache speed: 0.241797
Iter 6/10: ladvise speed: 0.230288
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.257761
Iter 7/10: OSS cache speed: 0.238631
Iter 7/10: ladvise speed: 0.222274
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.227735
Iter 8/10: OSS cache speed: 0.236174
Iter 8/10: ladvise speed: 0.237706
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.194446
Iter 9/10: OSS cache speed: 0.183622
Iter 9/10: ladvise speed: 0.213521
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.247669
Iter 10/10: OSS cache speed: 0.26326
Iter 10/10: ladvise speed: 0.175554
Average uncached read: .23
Average speedup with OSS cached read:  .22 = +-4%
Average speedup with ladvise willread:  .23 = +0%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0