== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:13:15 (1788747195)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.91566 s, 10.6 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-ffff9aeb461db800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.322527
Iter 1/10: OSS cache speed: 0.402279
Iter 1/10: ladvise speed: 0.395704
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.367993
Iter 2/10: OSS cache speed: 0.423333
Iter 2/10: ladvise speed: 0.427644
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.363211
Iter 3/10: OSS cache speed: 0.412755
Iter 3/10: ladvise speed: 0.383723
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.41939
Iter 4/10: OSS cache speed: 0.449945
Iter 4/10: ladvise speed: 0.414864
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.375383
Iter 5/10: OSS cache speed: 0.360676
Iter 5/10: ladvise speed: 0.354833
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342255
Iter 6/10: OSS cache speed: 0.373775
Iter 6/10: ladvise speed: 0.51411
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435183
Iter 7/10: OSS cache speed: 0.460856
Iter 7/10: ladvise speed: 0.42429
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.418074
Iter 8/10: OSS cache speed: 0.460375
Iter 8/10: ladvise speed: 0.585168
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.560113
Iter 9/10: OSS cache speed: 0.603505
Iter 9/10: ladvise speed: 0.683659
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.587782
Iter 10/10: OSS cache speed: 0.680806
Iter 10/10: ladvise speed: 0.657122
Average uncached read: .41
Average speedup with OSS cached read:  .46 = +12%
Average speedup with ladvise willread:  .48 = +17%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0