== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:20:11 (1718317211)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.72579 s, 22.2 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-ffff8800b6fd6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.995184
Iter 1/10: OSS cache speed: 1.95494
Iter 1/10: ladvise speed: 1.44012
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.74481
Iter 2/10: OSS cache speed: 0.91052
Iter 2/10: ladvise speed: 1.03255
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.07435
Iter 3/10: OSS cache speed: 2.31121
Iter 3/10: ladvise speed: 3.32684
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.73665
Iter 4/10: OSS cache speed: 3.20054
Iter 4/10: ladvise speed: 3.2837
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.85079
Iter 5/10: OSS cache speed: 3.29768
Iter 5/10: ladvise speed: 3.38328
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.35962
Iter 6/10: OSS cache speed: 2.65516
Iter 6/10: ladvise speed: 2.72939
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.56277
Iter 7/10: OSS cache speed: 3.15192
Iter 7/10: ladvise speed: 3.21354
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.9925
Iter 8/10: OSS cache speed: 3.22724
Iter 8/10: ladvise speed: 3.3221
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.98177
Iter 9/10: OSS cache speed: 3.29833
Iter 9/10: ladvise speed: 3.33474
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.93664
Iter 10/10: OSS cache speed: 2.80718
Iter 10/10: ladvise speed: 3.07521
Average uncached read: 2.22
Average speedup with OSS cached read: 2.68 = +20.72%
Average speedup with ladvise willread: 2.81 = +26.57%
fail_loc=0