== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:43:02 (1790955782)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0872 s, 7.0 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-ffff9344d8631800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.293713
Iter 1/10: OSS cache speed: 0.29655
Iter 1/10: ladvise speed: 0.276135
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.380923
Iter 2/10: OSS cache speed: 0.427888
Iter 2/10: ladvise speed: 0.380809
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.316775
Iter 3/10: OSS cache speed: 0.332843
Iter 3/10: ladvise speed: 0.410096
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.294608
Iter 4/10: OSS cache speed: 0.298237
Iter 4/10: ladvise speed: 0.348516
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.343447
Iter 5/10: OSS cache speed: 0.412163
Iter 5/10: ladvise speed: 0.466814
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.420454
Iter 6/10: OSS cache speed: 0.583077
Iter 6/10: ladvise speed: 0.596091
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.492999
Iter 7/10: OSS cache speed: 0.58061
Iter 7/10: ladvise speed: 0.599977
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.516921
Iter 8/10: OSS cache speed: 0.687209
Iter 8/10: ladvise speed: 0.774084
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.569523
Iter 9/10: OSS cache speed: 0.656878
Iter 9/10: ladvise speed: 0.729432
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.569469
Iter 10/10: OSS cache speed: 0.278057
Iter 10/10: ladvise speed: 0.398075
Average uncached read: .41
Average speedup with OSS cached read:  .45 = +9%
Average speedup with ladvise willread:  .49 = +19%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0