== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 15:51:40 (1773690700)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.94638 s, 15.1 MB/s
llite.lustre-ffff9026efd15000.read_ahead_stats=clear
llite.lustre-ffff9026efd15000.read_ahead_stats=
snapshot_time             1773690717.846949452 secs.nsecs
start_time                1773690709.135500126 secs.nsecs
elapsed_time              8.711449326 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=277813: Mon Mar 16 15:59:30 2026
  read: IOPS=11, BW=11.4MiB/s (11.9MB/s)(5120MiB/449744msec)
    clat (msec): min=46, max=296, avg=87.67, stdev=40.64
     lat (msec): min=46, max=296, avg=87.67, stdev=40.64
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   59], 10.00th=[   61], 20.00th=[   64],
     | 30.00th=[   66], 40.00th=[   69], 50.00th=[   72], 60.00th=[   75],
     | 70.00th=[   80], 80.00th=[   89], 90.00th=[  159], 95.00th=[  176],
     | 99.00th=[  226], 99.50th=[  243], 99.90th=[  268], 99.95th=[  288],
     | 99.99th=[  296]
   bw (  KiB/s): min= 4087, max=18432, per=100.00%, avg=11687.26, stdev=4280.34, samples=897
   iops        : min=    3, max=   18, avg=11.40, stdev= 4.18, samples=897
  lat (msec)   : 50=0.21%, 100=81.74%, 250=17.66%, 500=0.39%
  cpu          : usr=0.59%, sys=87.64%, ctx=11730, majf=5120, minf=1305870
  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=11.4MiB/s (11.9MB/s), 11.4MiB/s-11.4MiB/s (11.9MB/s-11.9MB/s), io=5120MiB (5369MB), run=449744-449744msec