== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:35:54 (1784046954)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7563 s, 7.6 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-ffff9f0612af9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.298864
Iter 1/10: OSS cache speed: 0.369919
Iter 1/10: ladvise speed: 0.347241
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.360583
Iter 2/10: OSS cache speed: 0.391908
Iter 2/10: ladvise speed: 0.304168
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.311927
Iter 3/10: OSS cache speed: 0.307258
Iter 3/10: ladvise speed: 0.351814
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.312322
Iter 4/10: OSS cache speed: 0.338972
Iter 4/10: ladvise speed: 0.321706
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.297894
Iter 5/10: OSS cache speed: 0.346545
Iter 5/10: ladvise speed: 0.282963
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.294413
Iter 6/10: OSS cache speed: 0.318564
Iter 6/10: ladvise speed: 0.303228
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.285619
Iter 7/10: OSS cache speed: 0.333933
Iter 7/10: ladvise speed: 0.2917
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.285167
Iter 8/10: OSS cache speed: 0.32668
Iter 8/10: ladvise speed: 0.309189
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353924
Iter 9/10: OSS cache speed: 0.332188
Iter 9/10: ladvise speed: 0.305865
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.249459
Iter 10/10: OSS cache speed: 0.335772
Iter 10/10: ladvise speed: 0.344977
Average uncached read: .30
Average speedup with OSS cached read:  .34 = +13%
Average speedup with ladvise willread:  .31 = +3%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0