== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:30:05 (1788485405)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6961 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-ffff9c4182c80800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.448124
Iter 1/10: OSS cache speed: 0.456977
Iter 1/10: ladvise speed: 0.408779
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381675
Iter 2/10: OSS cache speed: 0.379778
Iter 2/10: ladvise speed: 0.406876
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.410648
Iter 3/10: OSS cache speed: 0.430262
Iter 3/10: ladvise speed: 0.439395
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.402246
Iter 4/10: OSS cache speed: 0.451384
Iter 4/10: ladvise speed: 0.491367
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409221
Iter 5/10: OSS cache speed: 0.442771
Iter 5/10: ladvise speed: 0.426843
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.402349
Iter 6/10: OSS cache speed: 0.413231
Iter 6/10: ladvise speed: 0.427209
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.410271
Iter 7/10: OSS cache speed: 0.441482
Iter 7/10: ladvise speed: 0.446862
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.403545
Iter 8/10: OSS cache speed: 0.527385
Iter 8/10: ladvise speed: 0.47928
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389049
Iter 9/10: OSS cache speed: 0.390615
Iter 9/10: ladvise speed: 0.444836
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.450231
Iter 10/10: OSS cache speed: 0.459559
Iter 10/10: ladvise speed: 0.46226
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0