== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:45:22 (1786650322)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6555 s, 8.3 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-ffff972cc7e1b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.432457
Iter 1/10: OSS cache speed: 0.402783
Iter 1/10: ladvise speed: 0.359201
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.331658
Iter 2/10: OSS cache speed: 0.399418
Iter 2/10: ladvise speed: 0.398411
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.36491
Iter 3/10: OSS cache speed: 0.372976
Iter 3/10: ladvise speed: 0.384374
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.320888
Iter 4/10: OSS cache speed: 0.384405
Iter 4/10: ladvise speed: 0.325909
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.349273
Iter 5/10: OSS cache speed: 0.29195
Iter 5/10: ladvise speed: 0.349333
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356404
Iter 6/10: OSS cache speed: 0.404045
Iter 6/10: ladvise speed: 0.37835
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.372272
Iter 7/10: OSS cache speed: 0.347696
Iter 7/10: ladvise speed: 0.38871
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.380382
Iter 8/10: OSS cache speed: 0.407762
Iter 8/10: ladvise speed: 0.337208
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.346644
Iter 9/10: OSS cache speed: 0.378119
Iter 9/10: ladvise speed: 0.328956
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.31547
Iter 10/10: OSS cache speed: 0.330164
Iter 10/10: ladvise speed: 0.388251
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0