== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:43:01 (1787316181)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1872 s, 8.6 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-ffff8d9f492f1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.306873
Iter 1/10: OSS cache speed: 0.315948
Iter 1/10: ladvise speed: 0.321416
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.330324
Iter 2/10: OSS cache speed: 0.304859
Iter 2/10: ladvise speed: 0.300176
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.304268
Iter 3/10: OSS cache speed: 0.303289
Iter 3/10: ladvise speed: 0.293528
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.265441
Iter 4/10: OSS cache speed: 0.297287
Iter 4/10: ladvise speed: 0.314084
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.338154
Iter 5/10: OSS cache speed: 0.304548
Iter 5/10: ladvise speed: 0.27513
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300993
Iter 6/10: OSS cache speed: 0.306358
Iter 6/10: ladvise speed: 0.314156
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.352218
Iter 7/10: OSS cache speed: 0.339994
Iter 7/10: ladvise speed: 0.313152
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346581
Iter 8/10: OSS cache speed: 0.353439
Iter 8/10: ladvise speed: 0.347153
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330531
Iter 9/10: OSS cache speed: 0.329821
Iter 9/10: ladvise speed: 0.326088
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.321324
Iter 10/10: OSS cache speed: 0.348094
Iter 10/10: ladvise speed: 0.342369
Average uncached read: .31
Average speedup with OSS cached read:  .32 = +3%
Average speedup with ladvise willread:  .31 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0