== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:38:22 (1788687502)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4198 s, 9.2 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-ffff89b3d0aea000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.401788
Iter 1/10: OSS cache speed: 0.432088
Iter 1/10: ladvise speed: 0.369855
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.383818
Iter 2/10: OSS cache speed: 0.406258
Iter 2/10: ladvise speed: 0.445061
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.320817
Iter 3/10: OSS cache speed: 0.418689
Iter 3/10: ladvise speed: 0.38982
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.301245
Iter 4/10: OSS cache speed: 0.352132
Iter 4/10: ladvise speed: 0.334063
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.324778
Iter 5/10: OSS cache speed: 0.379395
Iter 5/10: ladvise speed: 0.40088
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374637
Iter 6/10: OSS cache speed: 0.38547
Iter 6/10: ladvise speed: 0.442631
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.339252
Iter 7/10: OSS cache speed: 0.375416
Iter 7/10: ladvise speed: 0.354681
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382667
Iter 8/10: OSS cache speed: 0.416567
Iter 8/10: ladvise speed: 0.404137
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.319966
Iter 9/10: OSS cache speed: 0.391553
Iter 9/10: ladvise speed: 0.441488
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317472
Iter 10/10: OSS cache speed: 0.393191
Iter 10/10: ladvise speed: 0.40003
Average uncached read: .34
Average speedup with OSS cached read:  .39 = +14%
Average speedup with ladvise willread:  .39 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0