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https://github.com/ibm-s390-linux/s390-tools.git
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14a79eb142
Increase the auxiliary buffer size from 8 pages to 1 megabyte in order to significantly increase compressed dump processing speed. For uncompressed dumps, the effect is minor. Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/*
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* zgetdump - Tool for copying and converting System z dumps
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*
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* Write dump to the file descriptor (fd)
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*
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* Copyright IBM Corp. 2001, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include "zg.h"
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#include "dfi.h"
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#include "dfo.h"
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#include "output.h"
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#define BUFFER_SIZE (1 * MIB)
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int write_dump(FILE *stream)
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{
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const u64 output_size = dfo_size();
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char *buf = zg_alloc(BUFFER_SIZE);
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u64 written = 0;
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if (!dfi_feat_copy())
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ERR_EXIT("Copying not possible for %s dumps", dfi_name());
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STDERR("Format Info:\n");
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STDERR(" Source: %s\n", dfi_name());
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STDERR(" Target: %s\n", dfo_name());
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STDERR("\n");
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zg_progress_init("Copying dump", output_size);
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while (written != output_size) {
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size_t rc;
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u64 cnt;
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cnt = dfo_read(buf, BUFFER_SIZE);
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rc = fwrite(buf, cnt, 1, stream);
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if (rc != 1 && ferror(stream))
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ERR_EXIT("Error: Write failed");
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written += cnt;
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zg_progress(written);
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};
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STDERR("\n");
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STDERR("Success: Dump has been copied\n");
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zg_free(buf);
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return 0;
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}
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