== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:30:49 (1781213449)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3099 s, 8.5 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-ffff88a259591000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.327044
Iter 1/10: OSS cache speed: 0.294501
Iter 1/10: ladvise speed: 0.295639
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.317125
Iter 2/10: OSS cache speed: 0.308037
Iter 2/10: ladvise speed: 0.356104
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.325359
Iter 3/10: OSS cache speed: 0.320409
Iter 3/10: ladvise speed: 0.355936
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.302715
Iter 4/10: OSS cache speed: 0.344745
Iter 4/10: ladvise speed: 0.261193
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.282052
Iter 5/10: OSS cache speed: 0.29982
Iter 5/10: ladvise speed: 0.317377
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.351466
Iter 6/10: OSS cache speed: 0.367582
Iter 6/10: ladvise speed: 0.409173
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385698
Iter 7/10: OSS cache speed: 0.407284
Iter 7/10: ladvise speed: 0.359956
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.401733
Iter 8/10: OSS cache speed: 0.420077
Iter 8/10: ladvise speed: 0.387479
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.369224
Iter 9/10: OSS cache speed: 0.413305
Iter 9/10: ladvise speed: 0.368164
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337439
Iter 10/10: OSS cache speed: 0.391924
Iter 10/10: ladvise speed: 0.393497
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0