== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:10:00 (1788253800)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6799 s, 7.7 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-ffff92bdd1eda000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.333259
Iter 1/10: OSS cache speed: 0.389876
Iter 1/10: ladvise speed: 0.48703
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.486783
Iter 2/10: OSS cache speed: 0.495214
Iter 2/10: ladvise speed: 0.465981
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.511661
Iter 3/10: OSS cache speed: 0.445972
Iter 3/10: ladvise speed: 0.49195
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.418982
Iter 4/10: OSS cache speed: 0.468574
Iter 4/10: ladvise speed: 0.440439
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.450924
Iter 5/10: OSS cache speed: 0.488225
Iter 5/10: ladvise speed: 0.512158
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.497787
Iter 6/10: OSS cache speed: 0.444939
Iter 6/10: ladvise speed: 0.451232
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.486186
Iter 7/10: OSS cache speed: 0.560527
Iter 7/10: ladvise speed: 0.493299
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.436765
Iter 8/10: OSS cache speed: 0.482814
Iter 8/10: ladvise speed: 0.469381
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.517921
Iter 9/10: OSS cache speed: 0.436292
Iter 9/10: ladvise speed: 0.506588
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.375649
Iter 10/10: OSS cache speed: 0.498979
Iter 10/10: ladvise speed: 0.466975
Average uncached read: .45
Average speedup with OSS cached read:  .47 = +4%
Average speedup with ladvise willread:  .47 = +4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0