== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:58:10 (1784170690)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.89039 s, 17.8 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-ffff92fd04f75800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.73488
Iter 1/10: OSS cache speed: 2.15315
Iter 1/10: ladvise speed: 2.08285
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.97524
Iter 2/10: OSS cache speed: 1.59765
Iter 2/10: ladvise speed: 1.11961
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.63641
Iter 3/10: OSS cache speed: 2.14907
Iter 3/10: ladvise speed: 2.16049
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.17399
Iter 4/10: OSS cache speed: 2.18771
Iter 4/10: ladvise speed: 1.87708
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.28995
Iter 5/10: OSS cache speed: 1.23983
Iter 5/10: ladvise speed: 1.29152
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.36275
Iter 6/10: OSS cache speed: 1.98361
Iter 6/10: ladvise speed: 1.55446
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.28364
Iter 7/10: OSS cache speed: 1.78831
Iter 7/10: ladvise speed: 2.21335
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.18642
Iter 8/10: OSS cache speed: 1.85016
Iter 8/10: ladvise speed: 1.80659
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.04252
Iter 9/10: OSS cache speed: 1.96534
Iter 9/10: ladvise speed: 2.0104
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.01814
Iter 10/10: OSS cache speed: 2.14519
Iter 10/10: ladvise speed: 2.19985
Average uncached read: 1.77
Average speedup with OSS cached read:  1.90 = +7%
Average speedup with ladvise willread:  1.83 = +3%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0