== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:39:49 (1785879589)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.1657 s, 6.5 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-ffff9d1e062a2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.224012
Iter 1/10: OSS cache speed: 0.294245
Iter 1/10: ladvise speed: 0.216751
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.222059
Iter 2/10: OSS cache speed: 0.235328
Iter 2/10: ladvise speed: 0.299954
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.288915
Iter 3/10: OSS cache speed: 0.245865
Iter 3/10: ladvise speed: 0.236357
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.244078
Iter 4/10: OSS cache speed: 0.284886
Iter 4/10: ladvise speed: 0.206216
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.246331
Iter 5/10: OSS cache speed: 0.212821
Iter 5/10: ladvise speed: 0.292329
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.217338
Iter 6/10: OSS cache speed: 0.283387
Iter 6/10: ladvise speed: 0.270042
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.231879
Iter 7/10: OSS cache speed: 0.24761
Iter 7/10: ladvise speed: 0.24292
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.212634
Iter 8/10: OSS cache speed: 0.247105
Iter 8/10: ladvise speed: 0.36266
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.23921
Iter 9/10: OSS cache speed: 0.234301
Iter 9/10: ladvise speed: 0.244309
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.276564
Iter 10/10: OSS cache speed: 0.305323
Iter 10/10: ladvise speed: 0.263581
Average uncached read: .24
Average speedup with OSS cached read:  .25 = +4%
Average speedup with ladvise willread:  .26 = +8%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0