== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:09:33 (1788728973)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.07164 s, 13.0 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-ffff945203147000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.513887
Iter 1/10: OSS cache speed: 0.507081
Iter 1/10: ladvise speed: 0.499734
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.494673
Iter 2/10: OSS cache speed: 0.517499
Iter 2/10: ladvise speed: 0.499627
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.496816
Iter 3/10: OSS cache speed: 0.501761
Iter 3/10: ladvise speed: 0.561298
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.546406
Iter 4/10: OSS cache speed: 0.561518
Iter 4/10: ladvise speed: 0.588853
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.586566
Iter 5/10: OSS cache speed: 0.49878
Iter 5/10: ladvise speed: 0.608291
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.57505
Iter 6/10: OSS cache speed: 0.596663
Iter 6/10: ladvise speed: 0.6742
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.747693
Iter 7/10: OSS cache speed: 0.905722
Iter 7/10: ladvise speed: 1.09916
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.49786
Iter 8/10: OSS cache speed: 1.16119
Iter 8/10: ladvise speed: 1.1416
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.53383
Iter 9/10: OSS cache speed: 1.11093
Iter 9/10: ladvise speed: 1.27389
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.63165
Iter 10/10: OSS cache speed: 1.45353
Iter 10/10: ladvise speed: 1.72718
Average uncached read: .86
Average speedup with OSS cached read:  .78 = +-9%
Average speedup with ladvise willread:  .86 = +0%
Speedup with OSS cached read less than 20%,  got -9%. Skipping ladvise willread check.
fail_loc=0