== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:23:05 (1746134585)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.04444 s, 20.8 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-ffff8800b345d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.998133
Iter 1/10: OSS cache speed: 1.22732
Iter 1/10: ladvise speed: 1.2668
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.15182
Iter 2/10: OSS cache speed: 1.32838
Iter 2/10: ladvise speed: 1.22516
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.05497
Iter 3/10: OSS cache speed: 1.20641
Iter 3/10: ladvise speed: 1.10459
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.979859
Iter 4/10: OSS cache speed: 1.0456
Iter 4/10: ladvise speed: 1.15624
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.950633
Iter 5/10: OSS cache speed: 1.06736
Iter 5/10: ladvise speed: 1.12522
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.977164
Iter 6/10: OSS cache speed: 1.04259
Iter 6/10: ladvise speed: 1.0469
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.982861
Iter 7/10: OSS cache speed: 1.14806
Iter 7/10: ladvise speed: 1.29364
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.979289
Iter 8/10: OSS cache speed: 1.07478
Iter 8/10: ladvise speed: 1.2432
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.06837
Iter 9/10: OSS cache speed: 1.14362
Iter 9/10: ladvise speed: 1.24214
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.987364
Iter 10/10: OSS cache speed: 1.17048
Iter 10/10: ladvise speed: 0.949614
Average uncached read: 1.01
Average speedup with OSS cached read:  1.14 = +12%
Average speedup with ladvise willread:  1.16 = +14%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0