== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:24:34 (1784697874)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7253 s, 8.9 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-ffff8eb65821b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.451176
Iter 1/10: OSS cache speed: 0.663256
Iter 1/10: ladvise speed: 0.6104
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.623101
Iter 2/10: OSS cache speed: 0.616226
Iter 2/10: ladvise speed: 0.616769
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.655635
Iter 3/10: OSS cache speed: 0.67791
Iter 3/10: ladvise speed: 0.683466
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.696292
Iter 4/10: OSS cache speed: 0.755106
Iter 4/10: ladvise speed: 0.709334
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.736867
Iter 5/10: OSS cache speed: 0.805858
Iter 5/10: ladvise speed: 0.777026
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.769811
Iter 6/10: OSS cache speed: 0.759349
Iter 6/10: ladvise speed: 0.789227
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.843975
Iter 7/10: OSS cache speed: 1.03038
Iter 7/10: ladvise speed: 1.11335
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.01539
Iter 8/10: OSS cache speed: 0.867619
Iter 8/10: ladvise speed: 0.939595
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.84594
Iter 9/10: OSS cache speed: 0.67522
Iter 9/10: ladvise speed: 1.0191
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.629335
Iter 10/10: OSS cache speed: 0.466164
Iter 10/10: ladvise speed: 0.556729
Average uncached read: .72
Average speedup with OSS cached read:  .73 = +1%
Average speedup with ladvise willread:  .78 = +8%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0