== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:46:12 (1780087572)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.78713 s, 18.1 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-ffff958bc8754800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.13167
Iter 1/10: OSS cache speed: 2.08005
Iter 1/10: ladvise speed: 2.12211
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.17085
Iter 2/10: OSS cache speed: 2.08372
Iter 2/10: ladvise speed: 2.16169
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19611
Iter 3/10: OSS cache speed: 2.14885
Iter 3/10: ladvise speed: 2.15559
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.04749
Iter 4/10: OSS cache speed: 2.1671
Iter 4/10: ladvise speed: 2.18486
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.20167
Iter 5/10: OSS cache speed: 2.00373
Iter 5/10: ladvise speed: 2.20693
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.25944
Iter 6/10: OSS cache speed: 1.97219
Iter 6/10: ladvise speed: 2.1046
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.21597
Iter 7/10: OSS cache speed: 2.2719
Iter 7/10: ladvise speed: 2.20864
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.9348
Iter 8/10: OSS cache speed: 1.49345
Iter 8/10: ladvise speed: 1.34211
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.51712
Iter 9/10: OSS cache speed: 1.51782
Iter 9/10: ladvise speed: 0.732742
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.44354
Iter 10/10: OSS cache speed: 1.54178
Iter 10/10: ladvise speed: 1.61995
Average uncached read: 2.01
Average speedup with OSS cached read:  1.92 = +-4%
Average speedup with ladvise willread:  1.88 = +-6%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0