== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:01:39 (1769076099)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.2511 s, 6.9 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-ffff8ce146464800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.278835
Iter 1/10: OSS cache speed: 0.3665
Iter 1/10: ladvise speed: 0.313016
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319932
Iter 2/10: OSS cache speed: 0.370715
Iter 2/10: ladvise speed: 0.339272
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.250099
Iter 3/10: OSS cache speed: 0.310862
Iter 3/10: ladvise speed: 0.322998
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.306319
Iter 4/10: OSS cache speed: 0.290508
Iter 4/10: ladvise speed: 0.363074
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.408097
Iter 5/10: OSS cache speed: 0.395563
Iter 5/10: ladvise speed: 0.314379
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.349139
Iter 6/10: OSS cache speed: 0.364232
Iter 6/10: ladvise speed: 0.322887
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.281447
Iter 7/10: OSS cache speed: 0.358786
Iter 7/10: ladvise speed: 0.345044
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36617
Iter 8/10: OSS cache speed: 0.391353
Iter 8/10: ladvise speed: 0.450916
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.344014
Iter 9/10: OSS cache speed: 0.33005
Iter 9/10: ladvise speed: 0.367898
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.315769
Iter 10/10: OSS cache speed: 0.375763
Iter 10/10: ladvise speed: 0.387146
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0