== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:06:41 (1788764801)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4741 s, 7.2 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-ffff9bf452343000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.373716
Iter 1/10: OSS cache speed: 0.427786
Iter 1/10: ladvise speed: 0.411467
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332833
Iter 2/10: OSS cache speed: 0.391523
Iter 2/10: ladvise speed: 0.38658
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.359393
Iter 3/10: OSS cache speed: 0.363928
Iter 3/10: ladvise speed: 0.384945
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.372309
Iter 4/10: OSS cache speed: 0.374902
Iter 4/10: ladvise speed: 0.411016
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.374517
Iter 5/10: OSS cache speed: 0.402978
Iter 5/10: ladvise speed: 0.409732
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.378466
Iter 6/10: OSS cache speed: 0.388116
Iter 6/10: ladvise speed: 0.444583
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385884
Iter 7/10: OSS cache speed: 0.442942
Iter 7/10: ladvise speed: 0.444425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.379174
Iter 8/10: OSS cache speed: 0.402822
Iter 8/10: ladvise speed: 0.412241
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.378759
Iter 9/10: OSS cache speed: 0.423198
Iter 9/10: ladvise speed: 0.411783
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.347463
Iter 10/10: OSS cache speed: 0.367917
Iter 10/10: ladvise speed: 0.410972
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0