== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:22:08 (1780384928)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4462 s, 7.8 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-ffff8e8a8535b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.446988
Iter 1/10: OSS cache speed: 0.477856
Iter 1/10: ladvise speed: 0.581243
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.464387
Iter 2/10: OSS cache speed: 0.546472
Iter 2/10: ladvise speed: 0.42786
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.374123
Iter 3/10: OSS cache speed: 0.4449
Iter 3/10: ladvise speed: 0.40388
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.447891
Iter 4/10: OSS cache speed: 0.416028
Iter 4/10: ladvise speed: 0.540314
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.628697
Iter 5/10: OSS cache speed: 0.678164
Iter 5/10: ladvise speed: 0.700102
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.616013
Iter 6/10: OSS cache speed: 0.661959
Iter 6/10: ladvise speed: 0.66377
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.58145
Iter 7/10: OSS cache speed: 0.680244
Iter 7/10: ladvise speed: 0.718018
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.635846
Iter 8/10: OSS cache speed: 0.736174
Iter 8/10: ladvise speed: 0.78964
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.744617
Iter 9/10: OSS cache speed: 0.922057
Iter 9/10: ladvise speed: 0.956091
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.837088
Iter 10/10: OSS cache speed: 1.00453
Iter 10/10: ladvise speed: 1.37012
Average uncached read: .57
Average speedup with OSS cached read:  .65 = +14%
Average speedup with ladvise willread:  .71 = +24%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0