== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:52:37 (1789685557)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2769 s, 10.2 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-ffff8c9d485d1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.378279
Iter 1/10: OSS cache speed: 0.410611
Iter 1/10: ladvise speed: 0.304079
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.472748
Iter 2/10: OSS cache speed: 0.524876
Iter 2/10: ladvise speed: 0.505358
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.353873
Iter 3/10: OSS cache speed: 0.419054
Iter 3/10: ladvise speed: 0.29342
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.444969
Iter 4/10: OSS cache speed: 0.445429
Iter 4/10: ladvise speed: 0.410935
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409823
Iter 5/10: OSS cache speed: 0.396442
Iter 5/10: ladvise speed: 0.602301
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.589841
Iter 6/10: OSS cache speed: 0.723179
Iter 6/10: ladvise speed: 0.722007
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.601505
Iter 7/10: OSS cache speed: 0.711591
Iter 7/10: ladvise speed: 0.751642
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.660932
Iter 8/10: OSS cache speed: 0.685438
Iter 8/10: ladvise speed: 0.376933
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.433812
Iter 9/10: OSS cache speed: 0.506089
Iter 9/10: ladvise speed: 0.404943
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381046
Iter 10/10: OSS cache speed: 0.498978
Iter 10/10: ladvise speed: 0.439805
Average uncached read: .47
Average speedup with OSS cached read:  .53 = +12%
Average speedup with ladvise willread:  .48 = +2%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0