== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:51:53 (1743735113)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 1.95315 s, 53.7 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-ffff88012a45f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.95104
Iter 1/10: OSS cache speed: 1.63858
Iter 1/10: ladvise speed: 1.42931
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.34488
Iter 2/10: OSS cache speed: 1.36652
Iter 2/10: ladvise speed: 1.31624
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.34121
Iter 3/10: OSS cache speed: 1.339
Iter 3/10: ladvise speed: 1.31614
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.30944
Iter 4/10: OSS cache speed: 2.38692
Iter 4/10: ladvise speed: 1.4684
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.66358
Iter 5/10: OSS cache speed: 1.32925
Iter 5/10: ladvise speed: 1.28018
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.48343
Iter 6/10: OSS cache speed: 1.33218
Iter 6/10: ladvise speed: 1.4031
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.35819
Iter 7/10: OSS cache speed: 1.44233
Iter 7/10: ladvise speed: 1.33055
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.50219
Iter 8/10: OSS cache speed: 2.05013
Iter 8/10: ladvise speed: 1.59562
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.50416
Iter 9/10: OSS cache speed: 1.86318
Iter 9/10: ladvise speed: 2.1101
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.44429
Iter 10/10: OSS cache speed: 2.30341
Iter 10/10: ladvise speed: 2.44514
Average uncached read: 1.59
Average speedup with OSS cached read:  1.70 = +6%
Average speedup with ladvise willread:  1.56 = +-1%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0