== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:34:05 (1746131645)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.6744 s, 18.5 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-ffff8800b6fe5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.842356
Iter 1/10: OSS cache speed: 0.855733
Iter 1/10: ladvise speed: 0.771316
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.913527
Iter 2/10: OSS cache speed: 0.850683
Iter 2/10: ladvise speed: 0.822895
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.831404
Iter 3/10: OSS cache speed: 0.821113
Iter 3/10: ladvise speed: 0.893031
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.99591
Iter 4/10: OSS cache speed: 0.85839
Iter 4/10: ladvise speed: 0.824508
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.853093
Iter 5/10: OSS cache speed: 0.92553
Iter 5/10: ladvise speed: 0.877504
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.896003
Iter 6/10: OSS cache speed: 0.889066
Iter 6/10: ladvise speed: 0.944332
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.99877
Iter 7/10: OSS cache speed: 1.04311
Iter 7/10: ladvise speed: 1.01286
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.929982
Iter 8/10: OSS cache speed: 0.950033
Iter 8/10: ladvise speed: 0.863737
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.985011
Iter 9/10: OSS cache speed: 0.952407
Iter 9/10: ladvise speed: 0.889845
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.947936
Iter 10/10: OSS cache speed: 0.923795
Iter 10/10: ladvise speed: 0.898261
Average uncached read: .91
Average speedup with OSS cached read:  .90 = +-1%
Average speedup with ladvise willread:  .87 = +-4%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0