== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:53:07 (1773687187)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.88547 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-ffff993a98132800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.6094
Iter 1/10: OSS cache speed: 1.73893
Iter 1/10: ladvise speed: 1.80154
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.97166
Iter 2/10: OSS cache speed: 2.0893
Iter 2/10: ladvise speed: 2.06417
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.991
Iter 3/10: OSS cache speed: 2.02988
Iter 3/10: ladvise speed: 1.84657
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.95118
Iter 4/10: OSS cache speed: 2.04178
Iter 4/10: ladvise speed: 2.08177
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.12271
Iter 5/10: OSS cache speed: 2.09071
Iter 5/10: ladvise speed: 2.06497
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.95228
Iter 6/10: OSS cache speed: 2.17616
Iter 6/10: ladvise speed: 2.25805
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.94682
Iter 7/10: OSS cache speed: 2.00182
Iter 7/10: ladvise speed: 1.96655
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.8845
Iter 8/10: OSS cache speed: 2.01106
Iter 8/10: ladvise speed: 1.87026
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.04667
Iter 9/10: OSS cache speed: 2.00654
Iter 9/10: ladvise speed: 1.92003
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02632
Iter 10/10: OSS cache speed: 2.02045
Iter 10/10: ladvise speed: 2.02613
Average uncached read: 1.95
Average speedup with OSS cached read:  2.02 = +3%
Average speedup with ladvise willread:  1.99 = +2%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0