== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:58:30 (1783969110)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9379 s, 7.5 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-ffff902bc682e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.380118
Iter 1/10: OSS cache speed: 0.418713
Iter 1/10: ladvise speed: 0.421749
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319132
Iter 2/10: OSS cache speed: 0.368377
Iter 2/10: ladvise speed: 0.353359
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.34844
Iter 3/10: OSS cache speed: 0.346347
Iter 3/10: ladvise speed: 0.347227
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.372063
Iter 4/10: OSS cache speed: 0.361202
Iter 4/10: ladvise speed: 0.397003
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.36041
Iter 5/10: OSS cache speed: 0.40768
Iter 5/10: ladvise speed: 0.386944
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.321526
Iter 6/10: OSS cache speed: 0.436963
Iter 6/10: ladvise speed: 0.442487
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368978
Iter 7/10: OSS cache speed: 0.423633
Iter 7/10: ladvise speed: 0.440384
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372661
Iter 8/10: OSS cache speed: 0.410833
Iter 8/10: ladvise speed: 0.434918
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.344717
Iter 9/10: OSS cache speed: 0.40165
Iter 9/10: ladvise speed: 0.362206
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.348046
Iter 10/10: OSS cache speed: 0.408449
Iter 10/10: ladvise speed: 0.422195
Average uncached read: .35
Average speedup with OSS cached read:  .39 = +11%
Average speedup with ladvise willread:  .40 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0