== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:57:45 (1784170665)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.60679 s, 18.7 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-ffff99f2498f0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.88304
Iter 1/10: OSS cache speed: 2.04405
Iter 1/10: ladvise speed: 1.35154
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.05062
Iter 2/10: OSS cache speed: 1.11968
Iter 2/10: ladvise speed: 2.01385
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.75243
Iter 3/10: OSS cache speed: 1.99473
Iter 3/10: ladvise speed: 1.27162
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.04383
Iter 4/10: OSS cache speed: 1.44793
Iter 4/10: ladvise speed: 1.24282
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.10358
Iter 5/10: OSS cache speed: 1.32236
Iter 5/10: ladvise speed: 1.76332
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.86837
Iter 6/10: OSS cache speed: 1.24146
Iter 6/10: ladvise speed: 1.60779
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.20733
Iter 7/10: OSS cache speed: 1.46149
Iter 7/10: ladvise speed: 1.29198
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.22885
Iter 8/10: OSS cache speed: 1.50878
Iter 8/10: ladvise speed: 1.37534
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.07015
Iter 9/10: OSS cache speed: 1.22955
Iter 9/10: ladvise speed: 1.5933
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.36057
Iter 10/10: OSS cache speed: 1.19287
Iter 10/10: ladvise speed: 1.33493
Average uncached read: 1.45
Average speedup with OSS cached read:  1.45 = +0%
Average speedup with ladvise willread:  1.48 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0