mirror of
https://github.com/YosysHQ/yosys
synced 2026-02-02 15:26:19 +00:00
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2014 Claire Xenia Wolf <claire@yosyshq.com>
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* Copyright (C) 2014 Johann Glaser <Johann.Glaser@gmx.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/yosys.h"
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#include "kernel/log_help.h"
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#include <fcntl.h>
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#include <stdlib.h>
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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#ifdef __linux__
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#include <unistd.h>
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struct LinuxPerf : public Pass {
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LinuxPerf() : Pass("linux_perf", "turn linux perf recording off or on") {
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internal();
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}
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bool formatted_help() override
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{
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auto *help = PrettyHelp::get_current();
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auto content_root = help->get_root();
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content_root->usage("linux_perf [on|off]");
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content_root->paragraph(
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"This pass turns Linux 'perf' profiling on or off, when it has been configured to use control FIFOs."
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"YOSYS_PERF_CTL and YOSYS_PERF_ACK must point to Linux perf control FIFOs."
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);
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content_root->paragraph("Example shell command line:");
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content_root->codeblock(
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"mkfifo /tmp/perf.fifo /tmp/perf-ack.fifo\n"
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"YOSYS_PERF_CTL=/tmp/perf.fifo YOSYS_PERF_ACK=/tmp/perf-ack.fifo \\\n"
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" perf record --latency --delay=-1 \\\n"
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" --control=fifo:/tmp/perf.fifo,/tmp/perf-ack.fifo --call-graph=dwarf ./yosys \\\n"
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" -dt -p \"read_rtlil design.rtlil; linux_perf on; opt_clean; linux_perf off\"\n"
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);
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return true;
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}
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void execute(std::vector<std::string> args, RTLIL::Design *) override
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{
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if (args.size() > 2)
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cmd_error(args, 2, "Unexpected argument.");
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std::string_view ctl_msg;
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if (args.size() == 2) {
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if (args[1] == "on")
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ctl_msg = "enable\n";
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else if (args[1] == "off")
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ctl_msg = "disable\n";
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else
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cmd_error(args, 1, "Unexpected argument.");
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}
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const char *ctl_fifo = std::getenv("YOSYS_PERF_CTL");
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if (!ctl_fifo)
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log_error("YOSYS_PERF_CTL environment variable not set.");
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const char *ack_fifo = std::getenv("YOSYS_PERF_ACK");
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if (!ack_fifo)
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log_error("YOSYS_PERF_ACK environment variable not set.");
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int ctl_fd = open(ctl_fifo, O_WRONLY);
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if (ctl_fd < 0)
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log_error("Failed to open YOSYS_PERF_CTL.");
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int ack_fd = open(ack_fifo, O_RDONLY);
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if (ack_fd < 0)
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log_error("Failed to open YOSYS_PERF_ACK.");
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int result = write(ctl_fd, ctl_msg.data(), ctl_msg.size());
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if (result != static_cast<int>(ctl_msg.size()))
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log_error("Failed to write to YOSYS_PERF_CTL.");
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char buffer[64];
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result = read(ack_fd, buffer, sizeof(buffer));
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close(ctl_fd);
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close(ack_fd);
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if (result <= 0)
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log_error("Failed to read from YOSYS_PERF_ACK.");
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if (strcmp(buffer, "ack\n") != 0)
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log_error("YOSYS_PERF_ACK did not return 'ack'.");
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}
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} LinuxPerf;
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#endif
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PRIVATE_NAMESPACE_END
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