flags 含义 MS_ASYNC 调用一个写操作并返回 MS_INVALIDATE 映像到相同文件的内存映像数据更新 MS_SYNC 完成写操作后函数返回 1. 2. 3. 4. 5. 6. 7. 通过/dev/mem设备文件和mmap系统调用,可以将线性地址描述的物理内存映射到进程的地址空间,然后就可以直接访问这段内存了。 二、应用实例: 1.
Sun Dec 27 20:28:01 2020 kern.warn kernel: [127864.712729] async_xor async_memcpy async_tx raid10 raid1 raid0 md_mod nls_utf8 nls_iso8859_1 nls_cp437 natsemi eeprom_93cx6 shortcut_fe_ipv6 shortcut_fe crypto_user algif_skcipher algif_rng algif_hash algif_aead af_alg sha256_sss...
(async_memcpy.ko) kmod(async_pq.ko) kmod(async_raid6_recov.ko) kmod(async_tx.ko) kmod(async_xor.ko) kmod(at24.ko) kmod(at803x.ko) kmod(at86rf230.ko) kmod(ata_generic.ko) kmod(ata_piix.ko) kmod(atbm8830.ko) kmod(ath.ko) kmod(ath10k_core.ko) kmod(ath10k_pci.ko) kmod(...
(O) vhost_net vhost vhost_iotlb tap efi_pstore dmi_sysfs Jun 25 11:52:38 kernel: ip_tables x_tables autofs4 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 raid1 ixgbe xhci_pci nvme xhci_pci_renesas xfrm_algo i2c_i801 nvme...
使用async_schedule调用module的probe函数,对于那些需要较多msleep的模块,这个方法可以通过并行提高init速度,但是一些模块对初始化顺序是有依赖的,所以慎用。 4. 优化设备IO驱动,提高数据的读写速度,kernel启动完成到android launcher完成,几乎无处不涉及到文件的读写,IO速度对启动时间的影响重大,代码是人写的,所以平台特...
Additionally, there is a set of asynchronous (i.e., non-blocking) CUDA memory functions (all having the Async suffix) that accept an additional stream parameter so that they can be queued in a particular sequence. For example: // Same as cudaMemcpy, with the addition of the cudaStream_t...
select ASYNC_MEMCPY help This is a one-shot self test that permutes through the recovery of all the possible two disk failure scenarios for a N-disk array. Recovery is performed with the asynchronous raid6 recovery routines, and will optionally use an offload engine if one ...
对于支持P2P内存访问的GPU,可以通过cudaMemcpy API实现基于拉取或推送的传输。主要区别在于指针:拉取使用本地目标指针和远程源指针,而推送则相反。图9展示了在8-A100 PCIe和8-A100 NVLink集群中两种传输方法的性能差异。结果表明,不同的互连可能有不同的偏好,因此应用自动调优来选择合适的传输方法。对于不支持P2P...
- io_uring: use kmemdup instead of kmalloc and memcpy - io_uring: increase IORING_MAX_ENTRIES to 32K - io_uring: make sqpoll wakeup possible with getevents - io_uring: extend async work merging - io_uring: limit parallelism of buffered writes ...
invalid opcode: 0000 [#1] SMP last sysfs file: /sys/kernel/dlm/emslv/event_done CPU 0 Modules linked in: ext2 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 linear vfat msdos fat autofs4 gfs2 sunrpc dlm configfs ipv6 uinput ppdev ...