== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:27:05 (1785392825)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 21.893 s, 4.8 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-ffff9b0f11096800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.24723
Iter 1/10: OSS cache speed: 0.210961
Iter 1/10: ladvise speed: 0.233393
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.254466
Iter 2/10: OSS cache speed: 0.201673
Iter 2/10: ladvise speed: 0.196862
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.276447
Iter 3/10: OSS cache speed: 0.241634
Iter 3/10: ladvise speed: 0.230418
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.220155
Iter 4/10: OSS cache speed: 0.246537
Iter 4/10: ladvise speed: 0.270067
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.281644
Iter 5/10: OSS cache speed: 0.213189
Iter 5/10: ladvise speed: 0.31711
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.243323
Iter 6/10: OSS cache speed: 0.2594
Iter 6/10: ladvise speed: 0.291895
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.225626
Iter 7/10: OSS cache speed: 0.215377
Iter 7/10: ladvise speed: 0.222074
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.259764
Iter 8/10: OSS cache speed: 0.206126
Iter 8/10: ladvise speed: 0.248633
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.268483
Iter 9/10: OSS cache speed: 0.291433
Iter 9/10: ladvise speed: 0.261046
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.2594
Iter 10/10: OSS cache speed: 0.232555
Iter 10/10: ladvise speed: 0.258806
Average uncached read: .25
Average speedup with OSS cached read:  .23 = +-8%
Average speedup with ladvise willread:  .25 = +0%
Speedup with OSS cached read less than 20%,  got -8%. Skipping ladvise willread check.
fail_loc=0