== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:07:27 (1788203247)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8983 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-ffff8bfbc9058000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.335783
Iter 1/10: OSS cache speed: 0.353012
Iter 1/10: ladvise speed: 0.282069
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.274754
Iter 2/10: OSS cache speed: 0.306823
Iter 2/10: ladvise speed: 0.340099
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339216
Iter 3/10: OSS cache speed: 0.33959
Iter 3/10: ladvise speed: 0.355719
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.331663
Iter 4/10: OSS cache speed: 0.328352
Iter 4/10: ladvise speed: 0.307909
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.354914
Iter 5/10: OSS cache speed: 0.392706
Iter 5/10: ladvise speed: 0.355893
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.326046
Iter 6/10: OSS cache speed: 0.346053
Iter 6/10: ladvise speed: 0.299815
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.307176
Iter 7/10: OSS cache speed: 0.313273
Iter 7/10: ladvise speed: 0.350342
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.352456
Iter 8/10: OSS cache speed: 0.342409
Iter 8/10: ladvise speed: 0.358567
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.354868
Iter 9/10: OSS cache speed: 0.331595
Iter 9/10: ladvise speed: 0.328564
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.33725
Iter 10/10: OSS cache speed: 0.374468
Iter 10/10: ladvise speed: 0.375011
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0