== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:02:28 (1786482148)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.99797 s, 11.7 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-ffff9bffd14bb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.513241
Iter 1/10: OSS cache speed: 0.6266
Iter 1/10: ladvise speed: 0.614282
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.54852
Iter 2/10: OSS cache speed: 0.613921
Iter 2/10: ladvise speed: 0.598335
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.516529
Iter 3/10: OSS cache speed: 0.618539
Iter 3/10: ladvise speed: 0.638778
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.547739
Iter 4/10: OSS cache speed: 0.622657
Iter 4/10: ladvise speed: 0.634022
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.55764
Iter 5/10: OSS cache speed: 0.642582
Iter 5/10: ladvise speed: 0.800874
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.598641
Iter 6/10: OSS cache speed: 0.747996
Iter 6/10: ladvise speed: 0.796518
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.743443
Iter 7/10: OSS cache speed: 1.04796
Iter 7/10: ladvise speed: 0.995837
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.09784
Iter 8/10: OSS cache speed: 1.36219
Iter 8/10: ladvise speed: 1.40511
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.992751
Iter 9/10: OSS cache speed: 0.993306
Iter 9/10: ladvise speed: 0.421695
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.258986
Iter 10/10: OSS cache speed: 0.260366
Iter 10/10: ladvise speed: 0.382103
Average uncached read: .63
Average speedup with OSS cached read:  .75 = +19%
Average speedup with ladvise willread:  .72 = +14%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0