== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:32:25 (1779096745)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.8875 s, 11.8 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-ffff8f14c551e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339701
Iter 1/10: OSS cache speed: 0.335336
Iter 1/10: ladvise speed: 0.36676
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.351433
Iter 2/10: OSS cache speed: 0.327872
Iter 2/10: ladvise speed: 0.347505
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.331158
Iter 3/10: OSS cache speed: 0.315825
Iter 3/10: ladvise speed: 0.284777
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.329466
Iter 4/10: OSS cache speed: 0.301033
Iter 4/10: ladvise speed: 0.244063
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317943
Iter 5/10: OSS cache speed: 0.364841
Iter 5/10: ladvise speed: 0.327163
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.275445
Iter 6/10: OSS cache speed: 0.281854
Iter 6/10: ladvise speed: 0.226071
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.297666
Iter 7/10: OSS cache speed: 0.290984
Iter 7/10: ladvise speed: 0.304941
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.299962
Iter 8/10: OSS cache speed: 0.263212
Iter 8/10: ladvise speed: 0.329747
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.306957
Iter 9/10: OSS cache speed: 0.288808
Iter 9/10: ladvise speed: 0.269841
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.339169
Iter 10/10: OSS cache speed: 0.335795
Iter 10/10: ladvise speed: 0.273483
Average uncached read: .31
Average speedup with OSS cached read:  .31 = +0%
Average speedup with ladvise willread:  .29 = +-6%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0