== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:44:25 (1763354665)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.2075 s, 14.5 MB/s
llite.lustre-ffff9e44c0419800.read_ahead_stats=clear
llite.lustre-ffff9e44c0419800.read_ahead_stats=
snapshot_time             1763354680.752713846 secs.nsecs
start_time                1763354674.849642379 secs.nsecs
elapsed_time              5.903071467 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=294597: Sun Nov 16 23:51:22 2025
  read: IOPS=12, BW=12.8MiB/s (13.5MB/s)(5120MiB/399080msec)
    clat (msec): min=35, max=240, avg=77.78, stdev=39.52
     lat (msec): min=35, max=240, avg=77.78, stdev=39.52
    clat percentiles (msec):
     |  1.00th=[   43],  5.00th=[   47], 10.00th=[   50], 20.00th=[   53],
     | 30.00th=[   55], 40.00th=[   57], 50.00th=[   61], 60.00th=[   65],
     | 70.00th=[   71], 80.00th=[  112], 90.00th=[  140], 95.00th=[  171],
     | 99.00th=[  203], 99.50th=[  213], 99.90th=[  228], 99.95th=[  230],
     | 99.99th=[  241]
   bw (  KiB/s): min= 4087, max=24576, per=100.00%, avg=13170.96, stdev=5490.60, samples=795
   iops        : min=    3, max=   24, avg=12.84, stdev= 5.37, samples=795
  lat (msec)   : 50=12.71%, 100=63.95%, 250=23.34%
  cpu          : usr=0.70%, sys=84.49%, ctx=12141, majf=5121, minf=1305871
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=12.8MiB/s (13.5MB/s), 12.8MiB/s-12.8MiB/s (13.5MB/s-13.5MB/s), io=5120MiB (5369MB), run=399080-399080msec