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7daebbe469
Hardware breakpoints were originally intended to speed up the resume process by stopping the process at a specific point in the pie code. However, it turned out that they don't provide a significant speedup and, in some cases, can even slow it down. This is especially critical for hosts with a large number of CPUs. Hardware Breakpoint Restore Performance Benchmark ================================================== System: Linux 6.17.0-1007-gcp x86_64 CPU: INTEL(R) XEON(R) PLATINUM 8581C CPU @ 2.10GHz Virt: google CRIU: Version: 4.2 Iterations per data point: 5 Threads With BP (us) Without BP (us) Diff (%) -------- ------------ --------------- -------- >>> Benchmarking with 1 thread(s)... 1 391 326 19.9% >>> Benchmarking with 10 thread(s)... 10 1098 695 58.0% >>> Benchmarking with 50 thread(s)... 50 3772 2344 60.9% >>> Benchmarking with 100 thread(s)... 100 6740 4504 49.6% >>> Benchmarking with 500 thread(s)... 500 31382 19982 57.1% >>> Benchmarking with 1000 thread(s)... 1000 58617 40568 44.5% Notes: 'With BP' = hardware breakpoints enabled (current default) 'Without BP' = CRIU_FAULT=130 (FI_NO_BREAKPOINTS, uses PTRACE_SYSCALL) Positive diff% means breakpoints are slower Signed-off-by: Andrei Vagin <avagin@google.com>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#ifndef __COMPEL_RPC_H__
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#define __COMPEL_RPC_H__
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struct ctl_msg {
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uint32_t cmd; /* command itself */
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uint32_t ack; /* ack on command */
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int32_t err; /* error code on reply */
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};
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#define ctl_msg_cmd(_cmd) \
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(struct ctl_msg) \
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{ \
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.cmd = _cmd, \
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}
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#define ctl_msg_ack(_cmd, _err) \
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(struct ctl_msg) \
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{ \
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.cmd = _cmd, .ack = _cmd, .err = _err, \
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}
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/*
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* NOTE: each command's args should be arch-independed sized.
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* If you want to use one of the standard types, declare
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* alternative type for compatible tasks in parasite-compat.h
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*/
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enum {
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PARASITE_CMD_IDLE = 0,
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PARASITE_CMD_ACK,
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PARASITE_CMD_INIT_DAEMON,
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/*
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* This must be greater than INITs.
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*/
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PARASITE_CMD_FINI,
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__PARASITE_END_CMDS,
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};
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struct parasite_init_args {
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int32_t h_addr_len;
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struct sockaddr_un h_addr;
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int32_t log_level;
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uint64_t sigframe; /* pointer to sigframe */
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futex_t daemon_connected;
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#ifdef ARCH_HAS_LONG_PAGES
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uint32_t page_size;
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#endif
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};
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struct parasite_unmap_args {
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uint64_t parasite_start;
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uint64_t parasite_len;
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};
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#endif
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