== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:26:35 (1761247595)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0404 s, 9.5 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-ffff8c76d05f2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358665
Iter 1/10: OSS cache speed: 0.409575
Iter 1/10: ladvise speed: 0.407138
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.346151
Iter 2/10: OSS cache speed: 0.388339
Iter 2/10: ladvise speed: 0.383749
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.3881
Iter 3/10: OSS cache speed: 0.475779
Iter 3/10: ladvise speed: 0.46646
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.403413
Iter 4/10: OSS cache speed: 0.449864
Iter 4/10: ladvise speed: 0.438123
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.396381
Iter 5/10: OSS cache speed: 0.490438
Iter 5/10: ladvise speed: 0.453462
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.361549
Iter 6/10: OSS cache speed: 0.456618
Iter 6/10: ladvise speed: 0.516234
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.414901
Iter 7/10: OSS cache speed: 0.464896
Iter 7/10: ladvise speed: 0.394019
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.459528
Iter 8/10: OSS cache speed: 0.49394
Iter 8/10: ladvise speed: 0.401211
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.4145
Iter 9/10: OSS cache speed: 0.474232
Iter 9/10: ladvise speed: 0.431344
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.438112
Iter 10/10: OSS cache speed: 0.463149
Iter 10/10: ladvise speed: 0.434699
Average uncached read: .39
Average speedup with OSS cached read:  .45 = +15%
Average speedup with ladvise willread:  .43 = +10%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0