== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:19:30 (1788639570)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9867 s, 7.5 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-ffff9fd34606f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.428069
Iter 1/10: OSS cache speed: 0.437668
Iter 1/10: ladvise speed: 0.434644
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.405699
Iter 2/10: OSS cache speed: 0.374137
Iter 2/10: ladvise speed: 0.298248
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.389811
Iter 3/10: OSS cache speed: 0.383286
Iter 3/10: ladvise speed: 0.373362
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338002
Iter 4/10: OSS cache speed: 0.378396
Iter 4/10: ladvise speed: 0.362894
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.33464
Iter 5/10: OSS cache speed: 0.260151
Iter 5/10: ladvise speed: 0.327696
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372547
Iter 6/10: OSS cache speed: 0.312167
Iter 6/10: ladvise speed: 0.32632
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.387071
Iter 7/10: OSS cache speed: 0.393284
Iter 7/10: ladvise speed: 0.353786
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36759
Iter 8/10: OSS cache speed: 0.434237
Iter 8/10: ladvise speed: 0.463635
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365865
Iter 9/10: OSS cache speed: 0.368592
Iter 9/10: ladvise speed: 0.363435
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.4351
Iter 10/10: OSS cache speed: 0.448852
Iter 10/10: ladvise speed: 0.453919
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0