== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:35:44 (1788611744)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.3809 s, 6.8 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-ffff92ee5146b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.321711
Iter 1/10: OSS cache speed: 0.312355
Iter 1/10: ladvise speed: 0.298895
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.31061
Iter 2/10: OSS cache speed: 0.317702
Iter 2/10: ladvise speed: 0.33464
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.305206
Iter 3/10: OSS cache speed: 0.318096
Iter 3/10: ladvise speed: 0.29274
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.262908
Iter 4/10: OSS cache speed: 0.296176
Iter 4/10: ladvise speed: 0.359802
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.31796
Iter 5/10: OSS cache speed: 0.318998
Iter 5/10: ladvise speed: 0.266059
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.304043
Iter 6/10: OSS cache speed: 0.284659
Iter 6/10: ladvise speed: 0.267392
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368415
Iter 7/10: OSS cache speed: 0.299259
Iter 7/10: ladvise speed: 0.337728
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.331336
Iter 8/10: OSS cache speed: 0.310339
Iter 8/10: ladvise speed: 0.324682
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.345563
Iter 9/10: OSS cache speed: 0.380589
Iter 9/10: ladvise speed: 0.347655
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.379884
Iter 10/10: OSS cache speed: 0.384071
Iter 10/10: ladvise speed: 0.352014
Average uncached read: .32
Average speedup with OSS cached read:  .32 = +0%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0