== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:26:44 (1786181204)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0544 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-ffff8b3018194000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.44146
Iter 1/10: OSS cache speed: 0.498178
Iter 1/10: ladvise speed: 0.482493
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.455956
Iter 2/10: OSS cache speed: 0.484004
Iter 2/10: ladvise speed: 0.474437
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.442311
Iter 3/10: OSS cache speed: 0.475589
Iter 3/10: ladvise speed: 0.462256
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.434774
Iter 4/10: OSS cache speed: 0.466433
Iter 4/10: ladvise speed: 0.423717
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.420486
Iter 5/10: OSS cache speed: 0.475159
Iter 5/10: ladvise speed: 0.466415
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.442358
Iter 6/10: OSS cache speed: 0.451599
Iter 6/10: ladvise speed: 0.449234
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.423023
Iter 7/10: OSS cache speed: 0.453629
Iter 7/10: ladvise speed: 0.425426
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.437671
Iter 8/10: OSS cache speed: 0.442273
Iter 8/10: ladvise speed: 0.461243
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.467817
Iter 9/10: OSS cache speed: 0.466851
Iter 9/10: ladvise speed: 0.473508
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.470086
Iter 10/10: OSS cache speed: 0.488099
Iter 10/10: ladvise speed: 0.469414
Average uncached read: .44
Average speedup with OSS cached read:  .47 = +6%
Average speedup with ladvise willread:  .45 = +2%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0