== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:53:34 (1783972414)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3195 s, 9.3 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-ffff90a802f40800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.289381
Iter 1/10: OSS cache speed: 0.295469
Iter 1/10: ladvise speed: 0.284776
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.333834
Iter 2/10: OSS cache speed: 0.296223
Iter 2/10: ladvise speed: 0.328844
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.288095
Iter 3/10: OSS cache speed: 0.293937
Iter 3/10: ladvise speed: 0.414585
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.386487
Iter 4/10: OSS cache speed: 0.339835
Iter 4/10: ladvise speed: 0.296447
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.390833
Iter 5/10: OSS cache speed: 0.412614
Iter 5/10: ladvise speed: 0.342824
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.346232
Iter 6/10: OSS cache speed: 0.35047
Iter 6/10: ladvise speed: 0.36772
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.350122
Iter 7/10: OSS cache speed: 0.348404
Iter 7/10: ladvise speed: 0.373321
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.326846
Iter 8/10: OSS cache speed: 0.290656
Iter 8/10: ladvise speed: 0.295451
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.302796
Iter 9/10: OSS cache speed: 0.299745
Iter 9/10: ladvise speed: 0.29362
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.297337
Iter 10/10: OSS cache speed: 0.326655
Iter 10/10: ladvise speed: 0.334169
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0