== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:01:48 (1789268508)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.114 s, 8.7 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-ffff958ad8016000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.407782
Iter 1/10: OSS cache speed: 0.476641
Iter 1/10: ladvise speed: 0.398018
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.360809
Iter 2/10: OSS cache speed: 0.442795
Iter 2/10: ladvise speed: 0.455513
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.420587
Iter 3/10: OSS cache speed: 0.484266
Iter 3/10: ladvise speed: 0.437075
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.576932
Iter 4/10: OSS cache speed: 0.550278
Iter 4/10: ladvise speed: 0.529648
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.564054
Iter 5/10: OSS cache speed: 0.561238
Iter 5/10: ladvise speed: 0.627214
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.45759
Iter 6/10: OSS cache speed: 0.406478
Iter 6/10: ladvise speed: 0.463107
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400135
Iter 7/10: OSS cache speed: 0.450369
Iter 7/10: ladvise speed: 0.474034
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.520193
Iter 8/10: OSS cache speed: 0.541783
Iter 8/10: ladvise speed: 0.505432
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.519753
Iter 9/10: OSS cache speed: 0.600052
Iter 9/10: ladvise speed: 0.62746
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.458129
Iter 10/10: OSS cache speed: 0.598912
Iter 10/10: ladvise speed: 0.657003
Average uncached read: .46
Average speedup with OSS cached read:  .51 = +10%
Average speedup with ladvise willread:  .51 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0